Note F - Allowance For Loan Losses (Detail) - Activity In The Allowance For Loan Losses By Segregated Loan Category (USD $) In Thousands, unless otherwise specified																																																														3 Months Ended		6 Months Ended					3 Months Ended		6 Months Ended					3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended					3 Months Ended		6 Months Ended					3 Months Ended		6 Months Ended					3 Months Ended	6 Months Ended					3 Months Ended		6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011 Beginning Balance [Member] Construction Residential [Member] Real Estate [Member]	Mar. 31, 2012 Beginning Balance [Member] Construction Residential [Member]	Jun. 30, 2011 Beginning Balance [Member] Construction Residential [Member]	Jun. 30, 2011 Beginning Balance [Member] Construction Commercial [Member] Real Estate [Member]	Mar. 31, 2012 Beginning Balance [Member] Construction Commercial [Member]	Jun. 30, 2011 Beginning Balance [Member] Construction Commercial [Member]	Jun. 30, 2011 Beginning Balance [Member] Residential [Member] Real Estate [Member]	Mar. 31, 2012 Beginning Balance [Member] Residential [Member]	Jun. 30, 2011 Beginning Balance [Member] Residential [Member]	Jun. 30, 2011 Beginning Balance [Member] Commercial [Member] Real Estate [Member]	Mar. 31, 2012 Beginning Balance [Member] Commercial [Member]	Jun. 30, 2011 Beginning Balance [Member] Commercial [Member]	Jun. 30, 2011 Beginning Balance [Member] Commercial And Industrial [Member] Real Estate [Member]	Mar. 31, 2012 Beginning Balance [Member] Commercial And Industrial [Member]	Jun. 30, 2011 Beginning Balance [Member] Commercial And Industrial [Member]	Jun. 30, 2011 Beginning Balance [Member] Consumer [Member] Real Estate [Member]	Mar. 31, 2012 Beginning Balance [Member] Consumer [Member]	Jun. 30, 2011 Beginning Balance [Member] Consumer [Member]	Jun. 30, 2011 Beginning Balance [Member] Non Real Estate Other [Member] Real Estate [Member]	Mar. 31, 2012 Beginning Balance [Member] Non Real Estate Other [Member]	Jun. 30, 2011 Beginning Balance [Member] Non Real Estate Other [Member]	Jun. 30, 2011 Beginning Balance [Member] Allowance for Loan and Lease Losses [Member] Real Estate [Member]	Mar. 31, 2012 Beginning Balance [Member] Allowance for Loan and Lease Losses [Member]	Jun. 30, 2011 Beginning Balance [Member] Allowance for Loan and Lease Losses [Member]	Jun. 30, 2011 Ending Balance [Member] Construction Residential [Member] Real Estate [Member]	Sep. 30, 2011 Ending Balance [Member] Construction Residential [Member]	Dec. 31, 2010 Ending Balance [Member] Construction Residential [Member]	Jun. 30, 2011 Ending Balance [Member] Construction Commercial [Member] Real Estate [Member]	Sep. 30, 2011 Ending Balance [Member] Construction Commercial [Member]	Dec. 31, 2010 Ending Balance [Member] Construction Commercial [Member]	Jun. 30, 2011 Ending Balance [Member] Residential [Member] Real Estate [Member]	Sep. 30, 2011 Ending Balance [Member] Residential [Member]	Dec. 31, 2010 Ending Balance [Member] Residential [Member]	Jun. 30, 2011 Ending Balance [Member] Commercial [Member] Real Estate [Member]	Sep. 30, 2011 Ending Balance [Member] Commercial [Member]	Dec. 31, 2010 Ending Balance [Member] Commercial [Member]	Jun. 30, 2011 Ending Balance [Member] Commercial And Industrial [Member] Real Estate [Member]	Sep. 30, 2011 Ending Balance [Member] Commercial And Industrial [Member]	Dec. 31, 2010 Ending Balance [Member] Commercial And Industrial [Member]	Jun. 30, 2011 Ending Balance [Member] Consumer [Member] Real Estate [Member]	Sep. 30, 2011 Ending Balance [Member] Consumer [Member]	Dec. 31, 2010 Ending Balance [Member] Consumer [Member]	Jun. 30, 2011 Ending Balance [Member] Non Real Estate Other [Member] Real Estate [Member]	Sep. 30, 2011 Ending Balance [Member] Non Real Estate Other [Member]	Dec. 31, 2010 Ending Balance [Member] Non Real Estate Other [Member]	Jun. 30, 2011 Ending Balance [Member] Allowance for Loan and Lease Losses [Member] Real Estate [Member]	Sep. 30, 2011 Ending Balance [Member] Allowance for Loan and Lease Losses [Member]	Dec. 31, 2010 Ending Balance [Member] Allowance for Loan and Lease Losses [Member]	Jun. 30, 2012 Individually Impaired [Member] Construction Residential [Member]	Sep. 30, 2011 Individually Impaired [Member] Construction Residential [Member]	Jun. 30, 2012 Individually Impaired [Member] Construction Commercial [Member]	Sep. 30, 2011 Individually Impaired [Member] Construction Commercial [Member]	Jun. 30, 2012 Individually Impaired [Member] Residential [Member]	Sep. 30, 2011 Individually Impaired [Member] Residential [Member]	Jun. 30, 2012 Individually Impaired [Member] Commercial And Industrial [Member]	Sep. 30, 2011 Individually Impaired [Member] Commercial And Industrial [Member]	Jun. 30, 2012 Individually Impaired [Member] Allowance for Loan and Lease Losses [Member]	Sep. 30, 2011 Individually Impaired [Member] Allowance for Loan and Lease Losses [Member]	Sep. 30, 2011 Construction Residential [Member] Individually Impaired [Member]	Jun. 30, 2012 Construction Residential [Member]	Jun. 30, 2011 Construction Residential [Member]	Jun. 30, 2012 Construction Residential [Member]	Jun. 30, 2011 Construction Residential [Member]	Sep. 30, 2011 Construction Residential [Member]	Dec. 31, 2010 Construction Residential [Member]	Sep. 30, 2011 Construction Commercial [Member] Individually Impaired [Member]	Jun. 30, 2012 Construction Commercial [Member]	Jun. 30, 2011 Construction Commercial [Member]	Jun. 30, 2012 Construction Commercial [Member]	Jun. 30, 2011 Construction Commercial [Member]	Sep. 30, 2011 Construction Commercial [Member]	Dec. 31, 2010 Construction Commercial [Member]	Sep. 30, 2011 Residential [Member] Individually Impaired [Member]	Jun. 30, 2012 Residential [Member]	Jun. 30, 2011 Residential [Member]	Jun. 30, 2012 Residential [Member]	Jun. 30, 2011 Residential [Member]	Sep. 30, 2011 Residential [Member]	Dec. 31, 2010 Residential [Member]	Jun. 30, 2012 Commercial [Member]	Jun. 30, 2011 Commercial [Member]	Jun. 30, 2012 Commercial [Member]	Jun. 30, 2011 Commercial [Member]	Sep. 30, 2011 Commercial [Member]	Dec. 31, 2010 Commercial [Member]	Sep. 30, 2011 Commercial And Industrial [Member] Individually Impaired [Member]	Jun. 30, 2012 Commercial And Industrial [Member]	Jun. 30, 2011 Commercial And Industrial [Member]	Jun. 30, 2012 Commercial And Industrial [Member]	Jun. 30, 2011 Commercial And Industrial [Member]	Sep. 30, 2011 Commercial And Industrial [Member]	Dec. 31, 2010 Commercial And Industrial [Member]	Sep. 30, 2011 Consumer [Member] Individually Impaired [Member]	Jun. 30, 2012 Consumer [Member]	Jun. 30, 2011 Consumer [Member]	Jun. 30, 2012 Consumer [Member]	Jun. 30, 2011 Consumer [Member]	Sep. 30, 2011 Consumer [Member]	Dec. 31, 2010 Consumer [Member]	Sep. 30, 2011 Non Real Estate Other [Member] Individually Impaired [Member]	Jun. 30, 2012 Non Real Estate Other [Member]	Jun. 30, 2012 Non Real Estate Other [Member]	Jun. 30, 2011 Non Real Estate Other [Member]	Sep. 30, 2011 Non Real Estate Other [Member]	Dec. 31, 2010 Non Real Estate Other [Member]	Sep. 30, 2011 Allowance for Loan and Lease Losses [Member] Individually Impaired [Member]	Jun. 30, 2012 Allowance for Loan and Lease Losses [Member]	Jun. 30, 2011 Allowance for Loan and Lease Losses [Member]	Jun. 30, 2012 Allowance for Loan and Lease Losses [Member]	Jun. 30, 2011 Allowance for Loan and Lease Losses [Member]	Sep. 30, 2011 Allowance for Loan and Lease Losses [Member]	Dec. 31, 2010 Allowance for Loan and Lease Losses [Member]
Allowance for loan losses:
Balance			$ 1,475	$ 1,237	$ 1,224	$ 2,269	$ 2,316	$ 2,152	$ 2,339	$ 1,547	$ 2,016	$ 2,464	$ 51	$ 2,610	$ 1,354	$ 3,213	$ 1,269										$ 971	$ 1,035	$ 22,419	$ 2,988	$ 1,857	$ 44,355	$ 2,017	$ 1,505	$ 100,370	$ 2,953	$ 64	$ 63,816	$ 944	$ 3,244	$ 210,977
Balance																		30	739	72	4	39	3	9,935	9,142	9,346																68	612	37,178	3	38	3,710	9,944	8,355	482,825
Ending balance, individually evaluated for impairment																																																				473		118		17		211		819	10,399		92		92			8,644		740		740			5,663		341		341				861		861			5,338		300		300			309		45		45			11						30,364		2,379		2,379
Ending balance, individually evaluated for impairment																																																				473		118		17		211		819	10,399		92		92			8,644		740		740			5,663		341		341				861		861			5,338		300		300			309		45		45			11						30,364		2,379		2,379
Ending balance, collectively evaluated for impairment																																																															26,394		26,394	12,020				65,880		65,880	35,711				116,848		116,848	94,707			200,321		200,321	63,816				36,179		36,179	205,639				2,829		2,829	36,869					382	3,699				448,833		448,833	452,461
Ending balance, collectively evaluated for impairment																																																															26,394		26,394	12,020				65,880		65,880	35,711				116,848		116,848	94,707			200,321		200,321	63,816				36,179		36,179	205,639				2,829		2,829	36,869					382	3,699				448,833		448,833	452,461
Ending balance, collectively evaluated for impairment																																																															879		879	562	562			2,248		2,248	1,739	1,739			1,676		1,676	1,488	1,488		2,092		2,092	64	64			644		644	3,033	3,033			23		23	612	612				3	38	38			7,565		7,565	7,536	7,536
Charge-offs																																																														(669)	(46)	(1,508)	(164)				(1,224)		(2,503)	(96)				(81)	(469)	(255)	(1,342)				(141)		(609)					(190)		(367)				(265)		(306)	(11)				(11)	(11)					(2,250)	(846)	(4,583)	(2,589)
Recoveries																																																														11	18	17	30				10		27					27		35	1				5		16				11	2	16	90				40	1	42	28				1	1					100	26	138	165
Provision																																																														456	(225)	1,029	(370)				755	836	1,550	815				12	470	117	1,019			13	479	24	1,082				20	(137)	49	(133)				98	(5)	113	21				9	12	(1)				1,363	1,418	2,894	2,433
Ending balance	482,825	490,455																																																												1,035	37,036	1,035	37,036	22,419			1,857	76,627	1,857	76,627	44,355			1,505	121,485	1,505	121,485	100,370		64	207,159	64	207,159	63,816			3,244	37,127	3,244	37,127	210,977			612	2,905	612	2,905	37,178			38	38	382	3,710			8,355	482,721	8,355	482,721	482,825
Ending balance, individually evaluated for impairment																																																			473		118		17		211		819				10,642		10,642	10,399				10,747		10,747	8,644				4,637		4,637	5,663			6,838		6,838					948		948	5,338				76		76	309						11				33,888		33,888	30,364
Balance			1,475	1,237	1,224	2,269	2,316	2,152	2,339	1,547	2,016	2,464	51	2,610	1,354	3,213	1,269										971	1,035	22,419	2,988	1,857	44,355	2,017	1,505	100,370	2,953	64	63,816	944	3,244	210,977																					1,497	971	1,497	971				2,783	2,988	2,783	2,988				1,608	2,017	1,608	2,017			40	2,953	40	2,953				3,179	944	3,179	944
Balance																		$ 30	$ 739	$ 72	$ 4	$ 39	$ 3	$ 9,935	$ 9,142	$ 9,346																$ 68	$ 612	$ 37,178	$ 3	$ 38	$ 3,710	$ 9,944	$ 8,355	$ 482,825																																														$ 763	$ 68	$ 763	$ 68				$ 36	$ 36	$ 3				$ 9,906	$ 9,944	$ 9,906	$ 9,944

NORTH STATE BANCORP 10-Q