Cumulative Other Comprehensive Income (Loss) - Schedule of Amounts Recognized in Cumulative Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Amounts recognized in cumulative other comprehensive income (Loss) by component
Balance at beginning of period	$ (21,205)	$ (38,331)
Other comprehensive income (loss) before reclassifications	(19,855)	(5,126)
Amount of loss reclassified from cumulative other comprehensive (loss) income into interest expense	1,295	3,692
Net current period other comprehensive income (loss)	(18,560)	(1,434)
Balance at end of period	(39,765)	(39,765)
Unrealized Gain (Loss) on Derivative Instruments
Amounts recognized in cumulative other comprehensive income (Loss) by component
Balance at beginning of period	(10,079)	(11,706)
Other comprehensive income (loss) before reclassifications	537	(324)
Amount of loss reclassified from cumulative other comprehensive (loss) income into interest expense	1,268	3,756
Net current period other comprehensive income (loss)	1,805	3,432
Balance at end of period	(8,274)	(8,274)
Foreign Currency Translation Adjustments
Amounts recognized in cumulative other comprehensive income (Loss) by component
Balance at beginning of period	(11,099)	(26,647)
Other comprehensive income (loss) before reclassifications	(20,392)	(4,844)
Amount of loss reclassified from cumulative other comprehensive (loss) income into interest expense	0	0
Net current period other comprehensive income (loss)	(20,392)	(4,844)
Balance at end of period	(31,491)	(31,491)
Equity in Unrealized Gain (Loss) of an Investee
Amounts recognized in cumulative other comprehensive income (Loss) by component
Balance at beginning of period	(27)	22
Other comprehensive income (loss) before reclassifications	0	42
Amount of loss reclassified from cumulative other comprehensive (loss) income into interest expense	27	(64)
Net current period other comprehensive income (loss)	27	(22)
Balance at end of period	$ 0	$ 0