Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended		10 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Nov. 15, 2010 Predecessor
Current:
Federal	$ 1,602	$ 18,097	$ 9,868	$ 3,650
State	366	3,267	2,370	1,185
Foreign	182	334	393	95
Total current	2,150	21,698	12,631	4,930
Deferred:
Federal	2,372	2,399	6,250	(47,022)
State	433	1,658	1,160	(8,576)
Foreign	(148)	5	(36)	148
Total deferred	2,657	4,062	7,374	(55,450)
Total income tax expense (benefit)	$ 4,807	$ 25,760	$ 20,005	$ (50,520)
Current:
Federal income tax at the statutory rate (as a percent)	35.00%	35.00%	35.00%	35.00%
Increase in income tax expense (benefit):
State and foreign income taxes, net of federal benefits (as a percent)	4.10%	4.30%	4.40%	3.60%
Jobs tax credits, net (as a percent)	(3.10%)	(2.30%)	(5.90%)	1.40%
Nondeductible expenses (as a percent)	0.30%	0.40%	(1.10%)	(1.50%)
Reserve for uncertain tax positions (as a percent)		1.30%
Other (as a percent)		(0.10%)
Nondeductible impairments (as a percent)				(14.60%)
Effective tax rate (as a percent)	36.30%	38.60%	32.40%	23.90%