Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Long-term debt
Total debt	$ 938,125	$ 988,125
Less: current portion of long-term debt	(21,693)	(14,903)
Total long-term debt	916,432	973,222
11.5% Senior Notes due 2018 [Member]
Long-term debt
Total debt	325,000	325,000
Term Loan A, maturing August 17, 2015 [Member] | Credit Agreement [Member]
Long-term debt
Total debt	146,693	158,653
Term Loan B, maturing August 17, 2016 [Member] | Credit Agreement [Member]
Long-term debt
Total debt	$ 466,432	$ 504,472