Long Term Obligations (Details 3) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Secured Seller Notes [Member]	Dec. 31, 2013 Senior Term Notes Two [Member]	Dec. 31, 2013 Senior Term Notes [Member]	Dec. 31, 2013 Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum			10.00%
Senior Notes	$ 556,914	$ 592,422
2012	51,089			47,344	47,574	3,515
2013	54,708				51,289	3,419
2014	461,452				458,281	3,171
2015	3,490				0	3,490
2016	3,805				0	3,805
Long-term Debt, Maturities, Repayments of Principal after Year Five	45,101				0	45,101
Line of Credit Facility, Amount Outstanding	0	0
Secured Debt	230	266
Long-term Debt	557,144	592,688
Capital Lease Obligations	62,501	37,955
Debt and Capital Lease Obligations	619,645	630,643
Long-term Debt and Capital Lease Obligations, Current	51,087	39,002
Long-term Debt and Capital Lease Obligations	$ 568,558	$ 591,641
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum			10.00%