Long-Term Indebtedness (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Summary of Long-term debt
Long-term debt	$ 1,407,039
Net discount	(6,436)	(8,109)
Long-term debt	1,400,603	1,405,206
Less current portion	(6,269)	(6,240)
Long-term debt	1,394,334	1,398,966
Annual maturities of long-term debt, assuming no acceleration of maturities
2014	6,269
2015	6,339
2016	6,370
2017	34,983
2018	553,078
Thereafter	800,000
Total	1,407,039
Term Loan B
Summary of Long-term debt
Long-term debt	576,366	582,187
Annual maturities of long-term debt, assuming no acceleration of maturities
Total	576,366	582,187
Senior unsecured 2021 Notes
Summary of Long-term debt
Long-term debt	800,000	800,000
Annual maturities of long-term debt, assuming no acceleration of maturities
Total	800,000	800,000
HWP Refinance Loan
Summary of Long-term debt
Long-term debt	30,673	31,128
Annual maturities of long-term debt, assuming no acceleration of maturities
Total	$ 30,673	$ 31,128