Income Taxes - Reconciliation of Gross Unrecognized Tax Benefits (Details) (USD $) In Thousands, unless otherwise specified	11 Months Ended	12 Months Ended		1 Months Ended
	Dec. 31, 2010 Successor Company	Dec. 31, 2012 Successor Company	Dec. 31, 2011 Successor Company	Jan. 31, 2010 Predecessor Company
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of period	$ 390,872	$ 5,942	$ 20,954	$ 298,001
Gross additions for tax positions related to the current year	693	0	7,029	95,555
Gross reductions for tax positions related to the current year	(370,611)	0	0	(2,684)
Gross reductions for tax positions related to prior years	0	(16)	0	0
Gross reductions for tax positions related to the lapse of applicable statute of limitations	0	0	(20,261)	0
Settlements	0	0	(1,780)	0
Balance at end of period	$ 20,954	$ 5,926	$ 5,942	$ 390,872