Long-Term and Other Debt (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended		1 Months Ended		1 Months Ended
	Dec. 31, 2011 Credit agreement August Amendment	Aug. 25, 2011 Credit agreement August Amendment	Feb. 29, 2012 Secured senior term loan and revolving credit facility	Dec. 31, 2011 Secured senior term loan and revolving credit facility	Aug. 31, 2011 Term loan facilities under the Credit Agreement August Amendment tranche	Aug. 25, 2011 Incremental revolving facility August Amendment
Debt Instrument
Number of tranche requests					1
Maximum revolving commitments				$ 250,000		$ 200,000
Restricted payment basket		200,000
Fees and expenses	6,300
Deferred financing fees	5,800
Loss on early extinguishment of long-term debt	4,200
Fees and expenses			$ 57