Share-Based Compensation - Summary of Stock Options, Employee Stock SARs, and Employee Cash SARs Exercised (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Exercised	65,599	60,556	212,178	87,118
Intrinsic Value	$ 781	$ 70	$ 1,507	$ 128
Number of Shares Issued	35,800	15,822	90,191	33,292
Net Cash Payment to Employees	$ 26	$ 27	$ 169	$ 32
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Exercised	56,776	11,951	137,307	28,426
Weighted Average Exercise Price	$ 12.65	$ 12.07	$ 14.90	$ 12.07
Intrinsic Value	$ 734	$ 54	$ 1,396	$ 108
Number of Shares Issued	33,336	11,951	79,601	28,426
Employee Stock SARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Exercised	8,014	32,304	46,721	38,569
Weighted Average Exercise Price	$ 12.44	$ 13.41	$ 15.85	$ 11.82
Intrinsic Value	$ 47	$ 16	$ 111	$ 20
Number of Shares Issued	2,464	3,871	10,590	4,866
Employee Cash SARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Exercised	809	16,301	28,150	20,123
Weighted Average Exercise Price	$ 14.44	$ 14.07	$ 16.47	$ 11.69
Net Cash Payment to Employees	$ 26	$ 27	$ 169	$ 32

PACIFIC CONTINENTAL CORP 10-Q