Cumulative Other Comprehensive (Loss) Income (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reclassifications out of cumulative other comprehensive income (loss)
Interest expenses	$ 173,011	$ 201,840	$ 191,876
Equity in earnings of investees	(25,754)	(11,420)	(11,377)
Total reclassifications	(5,004)
Cumulative Other Comprehensive Income (Loss) to Net Loss
Reclassifications out of cumulative other comprehensive income (loss)
Total reclassifications	5,004
Unrealized gains and losses on available for sale securities
Reclassifications out of cumulative other comprehensive income (loss)
Total reclassifications	17
Unrealized gains and losses on available for sale securities | Cumulative Other Comprehensive Income (Loss) to Net Loss
Reclassifications out of cumulative other comprehensive income (loss)
Equity in earnings of investees	(17)
Interest rate swap contracts | Cumulative Other Comprehensive Income (Loss) to Net Loss
Reclassifications out of cumulative other comprehensive income (loss)
Interest expenses	$ 5,021