Share-Based Compensation - Summary of Stock Option Activity (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended	9 Months Ended
	Dec. 31, 2014	Sep. 28, 2012
Successor [Member] | Stock Option Tranche 1 [Member]
Shares
Beginning balance (in shares)	21,830
Granted (in shares)	6,604
Exercised (in shares)	(170)
Forfeited (in shares)	(400)
Ending balance (in shares)	27,864
Exercisable (in shares)	8,762
Expected to vest (in shares)	27,488
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 1.00
Granted (in dollars per share)	$ 1.40
Exercised (in dollars per share)	$ 1.00
Forfeited (in dollars per share)	$ 1.02
Ending balance (in dollars per share)	$ 1.09
Exercisable (in dollars per share)	$ 1.01
Expected to vest (in dollars per share)	$ 1.10
Weighted Average Remaining Life
Outstanding	8 years 2 months
Exercisable	7 years 11 months
Expected to vest	8 years 2 months
Aggregate Intrinsic Value
Ending balance	$ 40,834
Exercisable	13,569
Vested and expected to vest	40,248
Successor [Member] | Stock Option Tranche 2 [Member]
Shares
Beginning balance (in shares)	21,330
Granted (in shares)	6,104
Exercised (in shares)	(110)
Forfeited (in shares)	(400)
Ending balance (in shares)	26,924
Exercisable (in shares)	8,372
Expected to vest (in shares)	26,384
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 1.00
Granted (in dollars per share)	$ 1.40
Exercised (in dollars per share)	$ 1.00
Forfeited (in dollars per share)	$ 1.02
Ending balance (in dollars per share)	$ 1.09
Exercisable (in dollars per share)	$ 1.00
Expected to vest (in dollars per share)	$ 1.09
Weighted Average Remaining Life
Outstanding	8 years 2 months 12 days
Exercisable	7 years 9 months
Expected to vest	8 years 2 months 12 days
Aggregate Intrinsic Value
Ending balance	39,568
Exercisable	13,060
Vested and expected to vest	38,795
Successor [Member] | Rollover Stock Options [Member]
Shares
Beginning balance (in shares)	17,351
Granted (in shares)	0
Exercised (in shares)	(268)
Forfeited (in shares)	0
Ending balance (in shares)	17,083
Exercisable (in shares)	17,083
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 0.25
Granted (in dollars per share)	$ 0.25
Exercised (in dollars per share)	$ 0.25
Forfeited (in dollars per share)	$ 0.25
Ending balance (in dollars per share)	$ 0.25
Exercisable (in dollars per share)	$ 0.25
Weighted Average Remaining Life
Outstanding	5 years 5 months
Exercisable	5 years 5 months
Aggregate Intrinsic Value
Ending balance	39,461
Exercisable	39,461
Predecessor [Member]
Shares
Beginning balance (in shares)		2,286
Granted (in shares)		310
Exercised (in shares)		(1,659)
Forfeited (in shares)		(937)
Ending balance (in shares)		0
Weighted Average Exercise Price
Beginning balance (in dollars per share)		$ 30.11
Granted (in dollars per share)		$ 32.97
Exercised (in dollars per share)		$ 25.61
Forfeited (in dollars per share)		$ 39.12
Ending balance (in dollars per share)		$ 0.00
Aggregate Intrinsic Value
Ending balance		$ 0