Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Predecessor [Member]	Predecessor [Member] Common Stock [Member]	Predecessor [Member] Additional Paid-In Capital [Member]	Predecessor [Member] Retained Earnings [Member]	Predecessor [Member] Accumulated Other Comprehensive Income/(Loss) [Member]	Predecessor [Member] Treasury Stock [Member]	Successor [Member]	Successor [Member] Common Stock [Member]	Successor [Member] Additional Paid-In Capital [Member]	Successor [Member] Retained Earnings [Member]	Successor [Member] Accumulated Other Comprehensive Income/(Loss) [Member]	Successor [Member] Treasury Stock [Member]
Beginning balance at Dec. 31, 2011		$ 609,581	$ 397	$ 389,166	$ 302,984	$ 13	$ (82,979)
Beginning balance (in shares) at Dec. 31, 2011			39,678
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		21,175			21,175
Unrealized loss on available for sale securities, net of tax		36				36
Exercise of stock options		11,316	4	11,312
Exercise of stock options (in shares)		1,659	394
Tax benefit related to share-based compensation		7,946		7,946
Employee stock purchase program		266		266
Purchase of treasury stock		(2,163)					(2,163)
Restricted stock grants		0	1	(1)
Restricted stock grants (in shares)			99
Forfeitures of restricted stock		0
Forfeitures of restricted stock (in shares)			(10)
Reclassification adjustment for net losses included in net loss, net of tax		0
Compensatory arrangements		7,282		7,282
Ending balance at Sep. 28, 2012		655,439	402	415,971	324,159	49	(85,142)	0	0	0	0	0	0
Ending balance (in shares) at Sep. 28, 2012			40,161						0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								(32,545)			(32,545)
Unrealized loss on available for sale securities, net of tax								(10)				(10)
Reclassification adjustment for net losses included in net loss, net of tax								0
Compensatory arrangements								2,240		2,240
Capital contribution from Holdings								675,410		675,410
Ending balance at Dec. 31, 2012								645,095	0	677,650	(32,545)	(10)	0
Ending balance (in shares) at Dec. 31, 2012									0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								(14,746)
Ending balance at Mar. 31, 2013
Beginning balance at Dec. 31, 2012								645,095	0	677,650	(32,545)	(10)	0
Beginning balance (in shares) at Dec. 31, 2012									0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								(105,871)			(105,871)
Unrealized loss on available for sale securities, net of tax								(27)				(27)
Unrealized loss on cash flow hedges, net of tax								(1,411)				(1,411)
Reclassification adjustment for net losses included in net loss, net of tax								649				649
Compensatory arrangements								9,154		9,154
Capital contribution from Holdings								695		695
Cash settlement of Holdings stock option exercises								(327)		(327)
Cash contribution from Holdings								100		100
Ending balance at Dec. 31, 2013	548,057							548,057	0	687,272	(138,416)	(799)	0
Ending balance (in shares) at Dec. 31, 2013									0
Beginning balance at Sep. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								(40,035)
Ending balance at Dec. 31, 2013	548,057							548,057	0				0
Ending balance (in shares) at Dec. 31, 2013									0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								(39,365)
Ending balance at Mar. 31, 2014
Beginning balance at Dec. 31, 2013	548,057							548,057	0	687,272	(138,416)	(799)	0
Beginning balance (in shares) at Dec. 31, 2013									0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								(105,517)			(105,517)
Unrealized loss on available for sale securities, net of tax								(3)				(3)
Unrealized loss on cash flow hedges, net of tax								(5,765)				(5,765)
Reclassification adjustment for net losses included in net loss, net of tax								2,880				2,880
Compensatory arrangements								8,678		8,678
Capital contribution from Holdings								113,121		113,121
Cash settlement of Holdings stock option exercises								(424)		(424)
Other								39		0		39
Ending balance at Dec. 31, 2014	561,066							561,066	0	808,647	(243,933)	(3,648)	0
Ending balance (in shares) at Dec. 31, 2014									0
Beginning balance at Sep. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								(1,594)
Ending balance at Dec. 31, 2014	$ 561,066							$ 561,066	$ 0				$ 0
Ending balance (in shares) at Dec. 31, 2014									0