Condensed Parent Company Statements of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	11 Months Ended	12 Months Ended		11 Months Ended	12 Months Ended		1 Months Ended
	Dec. 31, 2010 Successor Company	Dec. 31, 2012 Successor Company	Dec. 31, 2011 Successor Company	Dec. 31, 2010 Successor Company Parent Company	Dec. 31, 2012 Successor Company Parent Company	Dec. 31, 2011 Successor Company Parent Company	Jan. 31, 2010 Predecessor Company	Jan. 31, 2010 Predecessor Company Parent Company
Cash flow provided by (used in) operating activities	$ 512,359	$ 348,478	$ 413,314	$ 4,778	$ 1,579	$ 40,454	$ 71,741	$ (531)
Cash flow from investing activities
Additions to fixed assets and computer software	(36,527)	(22,589)	(28,085)	0	0	0	(1,766)	(643)
Contributions to subsidiaries				0	0	(12,227)		0
Intercompany loan				(4,900)	0	(2,000)		0
Net cash used in investing activities	(35,601)	(22,485)	(12,532)	(4,900)	0	(14,227)	(1,766)	(643)
Cash flow from financing activities
Long-term debt repurchases	(556,637)	(400,853)	(254,635)	0	(26,520)	0	(511,272)	0
Debt issuance costs and other financing items, net	(1,233)	(10,812)	497	0	0	0	(22,096)	(370)
Decrease in checks not yet presented for payment	9,509	(227)	(16,557)	(1,025)	0	0	(3,092)	(182)
Net cash used in financing activities	(548,361)	(411,892)	(270,695)	(1,025)	(26,520)	0	(536,460)	(552)
Increase (decrease) in cash and cash equivalents	(71,603)	(85,899)	130,087	(1,147)	(24,941)	26,227	(466,485)	(1,726)
Cash and cash equivalents, beginning of period	199,455	257,939	127,852	3,281	28,361	2,134	665,940	5,007
Cash and cash equivalents, end of period	$ 127,852	$ 172,040	$ 257,939	$ 2,134	$ 3,420	$ 28,361	$ 199,455	$ 3,281