Long Term Debt (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Capital Leases Obligations
Capital Leases Obligations, 2012	$ 4,180
Capital Leases Obligations, 2013	3,786
Capital Leases Obligations, 2014	2,828
Capital Leases Obligations, 2015	2,659
Capital Leases Obligations, 2016	2,490
Capital Leases Obligations, Thereafter	16,033
Gross	31,976
Less - amount representing interest	(8,889)
Total	23,087
Long-term Debt
Long-term Debt, 2012	453,257
Long-term Debt, 2013	527,648
Long-term Debt, 2014	1,517,236
Long-term Debt, 2015	3,758,974
Long-term Debt, 2016	3,697,025
Long-term Debt, Thereafter	56,297
Total	$ 10,010,437