Condensed Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Apr. 30, 2013	Jul. 31, 2012	Apr. 30, 2012
Current Assets
Cash and cash equivalents	$ 114,569	$ 123,714	$ 57,075	$ 55,547
Receivables, net of allowance for doubtful accounts	310,655	317,249
Income taxes receivable	23,374	25,871
Deferred income tax assets	48	49
Inventories	113,936	105,794
Prepaid expenses	35,722	22,219
Other assets	58,282	56,083
Assets, Current, Total	656,586	650,979
Property and equipment, net	1,052,542	1,075,254
Investments	29,363	26,896
Intangible assets	194,373	197,810
Goodwill	425,940	430,462
Restricted cash	33,470	29,639
Other assets	476,620	438,777
Deferred income tax assets	9,118	10,752
Assets held for sale	51,858	32,047
Total assets	2,929,870	2,892,616
Current Liabilities
Payables and accruals	374,657	419,179
Deferred revenue	36,481	27,652
Income taxes payable	40,736	47,987
Deferred income tax liabilities	618	618
Current facility secured by accounts receivable	45,450	53,512
Other liabilities	20,386	22,791
Current portion of long-term debt obligations	24,512	2,138
Liabilities, Current, Total	542,840	573,877
Long-term debt obligations	1,632,068	1,475,087
Deferred revenue	62,242	55,990
Other liabilities	239,612	246,455
Deferred income tax liabilities	10,810	10,627
Total liabilities	2,487,572	2,362,036
Redeemable non-controlling interests	(6,206)	(8,262)
Shareholder's equity	448,504	538,842
Liabilities and Equity	2,929,870	2,892,616
Parent
Current Assets
Cash and cash equivalents	(5,930)	19,391	(743)	196
Receivables, net of allowance for doubtful accounts	4	4
Current intercompany receivables	10,903	12,352
Prepaid expenses	13	26
Assets, Current, Total	4,990	31,773
Investments	444,012	507,725
Total assets	449,002	539,498
Current Liabilities
Payables and accruals	31	115
Income taxes payable	451	525
Liabilities, Current, Total	482	640
Other liabilities	16	16
Total liabilities	498	656
Shareholder's equity	448,504	538,842
Liabilities and Equity	449,002	539,498
Issuer
Current Assets
Cash and cash equivalents	84,908	3,478	29,116	(6,771)
Receivables, net of allowance for doubtful accounts	113	113
Current intercompany receivables	425,073	439,585
Prepaid expenses	22	49
Other assets	6,196	5,593
Assets, Current, Total	516,312	448,818
Investments	445,404	393,062
Other assets	33,250	29,449
Long-term intercompany receivables	1,045,938	859,564
Total assets	2,040,904	1,730,893
Current Liabilities
Payables and accruals	44,302	6,516
Income taxes payable	541	457
Current intercompany payables	39,015	35,729
Other liabilities	174,888	83,596
Liabilities, Current, Total	258,746	126,298
Long-term debt obligations	1,587,602	1,337,303
Total liabilities	1,846,348	1,463,601
Shareholder's equity	194,556	267,292
Liabilities and Equity	2,040,904	1,730,893
Guarantor
Current Assets
Cash and cash equivalents	216,359	117,444	93,625	41,032
Receivables, net of allowance for doubtful accounts	129,846	147,134
Current intercompany receivables	513,134	496,789
Income taxes receivable	162	362
Deferred income tax assets	(10)	(8)
Inventories	106,423	100,263
Prepaid expenses	13,527	10,287
Other assets	47,829	46,715
Assets, Current, Total	1,027,270	918,986
Property and equipment, net	966,615	993,911
Investments	436,471	357,608
Intangible assets	190,938	194,360
Goodwill	329,858	334,129
Restricted cash	5,278	8,172
Other assets	410,975	377,211
Long-term intercompany receivables	45,354	43,324
Deferred income tax assets	10,230	10,104
Assets held for sale	51,339	32,047
Total assets	3,474,328	3,269,852
Current Liabilities
Payables and accruals	255,709	280,876
Deferred revenue	22,709	18,901
Income taxes payable	29,754	36,891
Current intercompany payables	319,153	284,548
Deferred income tax liabilities	537	537
Other liabilities	190,510	100,129
Current portion of long-term debt obligations	24,512	2,138
Liabilities, Current, Total	842,884	724,020
Long-term debt obligations	1,632,068	1,475,087
Long-term intercompany payables	427,997	436,282
Deferred revenue	29,358	25,910
Other liabilities	151,214	145,550
Deferred income tax liabilities	9,333	9,287
Total liabilities	3,092,854	2,816,136
Shareholder's equity	381,474	453,716
Liabilities and Equity	3,474,328	3,269,852
Non-guarantor
Current Assets
Cash and cash equivalents	(95,860)	(13,121)	(35,807)	14,319
Receivables, net of allowance for doubtful accounts	181,388	170,744
Current intercompany receivables	243,675	241,723
Income taxes receivable	23,212	25,509
Deferred income tax assets	58	57
Inventories	7,513	5,531
Prepaid expenses	22,182	11,906
Other assets	185,359	93,038
Assets, Current, Total	567,527	535,387
Property and equipment, net	86,308	81,724
Investments	20,016	18,116
Intangible assets	3,435	3,450
Goodwill	96,082	96,333
Restricted cash	28,192	21,467
Other assets	65,662	61,596
Long-term intercompany receivables	441,433	449,718
Deferred income tax assets	(1,112)	648
Assets held for sale	519
Total assets	1,308,062	1,268,439
Current Liabilities
Payables and accruals	118,911	138,188
Deferred revenue	13,772	8,751
Income taxes payable	10,531	10,571
Current intercompany payables	448,499	466,300
Deferred income tax liabilities	81	81
Current facility secured by accounts receivable	45,450	53,512
Other liabilities	4,781	6,332
Liabilities, Current, Total	642,025	683,735
Long-term intercompany payables	58,808	56,789
Deferred revenue	32,884	30,080
Other liabilities	88,382	100,889
Deferred income tax liabilities	1,477	1,340
Total liabilities	823,576	872,833
Redeemable non-controlling interests	(6,206)	(8,262)
Shareholder's equity	490,692	403,868
Liabilities and Equity	1,308,062	1,268,439
Eliminations
Current Assets
Cash and cash equivalents	(84,908)	(3,478)	(29,116)	6,771
Receivables, net of allowance for doubtful accounts	(696)	(746)
Current intercompany receivables	(1,192,785)	(1,190,449)
Prepaid expenses	(22)	(49)
Other assets	(181,102)	(89,263)
Assets, Current, Total	(1,459,513)	(1,283,985)
Property and equipment, net	(381)	(381)
Investments	(1,316,540)	(1,249,615)
Other assets	(33,267)	(29,479)
Long-term intercompany receivables	(1,532,725)	(1,352,606)
Total assets	(4,342,426)	(3,916,066)
Current Liabilities
Payables and accruals	(44,296)	(6,516)
Income taxes payable	(541)	(457)
Current intercompany payables	(806,667)	(786,577)
Other liabilities	(349,793)	(167,266)
Liabilities, Current, Total	(1,201,297)	(960,816)
Long-term debt obligations	(1,587,602)	(1,337,303)
Long-term intercompany payables	(486,805)	(493,071)
Total liabilities	(3,275,704)	(2,791,190)
Shareholder's equity	(1,066,722)	(1,124,876)
Liabilities and Equity	$ (4,342,426)	$ (3,916,066)

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