Long Term Debt (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of Interest Expense
Cash payments for interest			$ 28,236	$ 18,630
Commitment and other fees paid			807	438
Unamortized (discount) premium			1,290	1,213
Change in accrued interest			4	2,871
Capitalized interest			(293)
Other			11	32
Interest expense	$ 14,832	$ 11,842	$ 30,055	$ 23,184