Condensed Consolidated Statement of Shareholders’ Equity and Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	Predecessor [Member] Common Stock [Member] USD ($)	Predecessor [Member] Additional Paid-in Capital [Member] USD ($)	Predecessor [Member] Retained Earnings [Member] USD ($)	Predecessor [Member] Accumulated Other Comprehensive Income (Loss) [Member] USD ($)		Predecessor [Member] USD ($)	Successor [Member] Common Stock [Member]	Successor [Member] Additional Paid-in Capital [Member] USD ($)	Successor [Member] Retained Earnings [Member] USD ($)	Successor [Member] Accumulated Other Comprehensive Income (Loss) [Member] USD ($)		Successor [Member] USD ($)		Common Stock [Member] USD ($)	Additional Paid-in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Total USD ($)
Balance at beginning of period at May. 31, 2009	$ 7,046	$ 42,012	$ 327,242	$ 8,278		$ 384,578
Balance at beginning of period (in Shares) at May. 31, 2009	70,456
Shares issued under employee stock plan	12	324				336
Shares issued under employee stock plan (in Shares)	125
Share-based compensation expense		5,946				5,946												5,946
Stock repurchases and retirements	(67)	(11,843)				(11,910)
Stock repurchases and retirements (in Shares)	(669)
Tax benefits (shortfall) related to stock-based compensation		(183)				(183)
Comprehensive income (net of taxes):
Foreign currency translation adjustments				(5,227)		(5,227)												(5,227)
Net income (loss)			82,583			82,583
Total comprehensive income (loss)						77,356												77,356
Balance at end of period at May. 31, 2010														6,991	36,256	409,825	3,051	456,123
Balance at beginning of period (in Shares) at May. 31, 2010														69,912
Shares issued under employee stock plan														48	1,264			1,312
Shares issued under employee stock plan (in Shares)														482
Share-based compensation expense															6,941			6,941
Stock repurchases and retirements														(2)	(524)			(526)
Stock repurchases and retirements (in Shares)														(27)
Tax benefits (shortfall) related to stock-based compensation															1,792			1,792
Comprehensive income (net of taxes):
Foreign currency translation adjustments																	13,903	13,903
Net income (loss)																89,327		89,327
Total comprehensive income (loss)																		103,230
Balance at end of period at May. 31, 2011	7,037	45,729	499,152	16,954	[1]	568,872												568,872
Balance at beginning of period (in Shares) at May. 31, 2011	70,367
Shares issued under employee stock plan	41	485			[1]	526
Shares issued under employee stock plan (in Shares)	415
Share-based compensation expense		16,233			[1]	16,233												16,233
Stock repurchases and retirements	(10)	(448)			[1]	(458)
Stock repurchases and retirements (in Shares)	(103)
Comprehensive income (net of taxes):
Foreign currency translation adjustments				(2,153)	[1]	(2,153)												(2,153)
Net income (loss)			(6,374)		[1]	(6,374)
Total comprehensive income (loss)						(8,527)												(8,527)
Balance at end of period at Aug. 19, 2011	7,068	61,999	492,778	14,801	[1]	576,646
Balance at end of period (in Shares) at Aug. 19, 2011	70,679
Capital contribution from parent, net of costs								706,233				706,233	[1]
Capital contribution from parent, net of costs (in Shares)							100
Other									(218)			(218)
Share-based compensation expense								753			[1]	753						753
Comprehensive income (net of taxes):
Foreign currency translation adjustments										(18,385)	[1]	(18,385)						(18,385)
Cash flow hedges, net of tax										(1,358)	[1]	(1,358)						(1,358)
Net income (loss)									(49,647)		[1]	(49,647)
Total comprehensive income (loss)												(69,390)						(69,390)
Balance at end of period at May. 31, 2012								$ 706,986	$ (49,865)	$ (19,743)	[1]	$ 637,378						$ 637,378
Balance at end of period (in Shares) at May. 31, 2012							100

[1] Accumulated Other Comprehensive Income balance primarily consists of foreign currency translation adjustments and has no tax effect.