Accumulated Other Comprehensive Loss - (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2013	[1]
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance	$ 3,030,254	$ 3,106,312
Ending Balance	3,062,923	3,030,254
Total equity	3,030,254	3,106,312	$ 3,062,923	$ 3,030,254	$ 3,117,062
Total accumulated other comprehensive loss included in shareholders' equity			3,003,391	2,972,581
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance	(22,023)	(9,483)
Other comprehensive income (loss), before reclassifications	(34,744)	(12,540)
Ending Balance	(56,767)	(22,023)
Total equity	(22,023)	(9,483)	(56,767)	(22,023)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance	(865)	(377)
Other comprehensive income (loss), before reclassifications	(659)	(1,884)
Reclassification adjustment	1,069	1,396
Ending Balance	(455)	(865)
Total equity	(865)	(377)	(455)	(865)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance	(22,888)
Ending Balance	(57,222)	(22,888)
Total equity	(22,888)	(22,888)	(57,222)	(22,888)
AOCI Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance	382
Ending Balance	1,191	382
Total equity	382	382	1,191	382
AOCI Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance	(22,506)	(9,784)
Ending Balance	(56,031)	(22,506)
Total equity	$ (22,506)	$ (9,784)	(56,031)	(22,506)	$ 7,437
Total accumulated other comprehensive loss included in shareholders' equity			$ (56,031)	$ (22,506)

[1] The Company adjusted the January 1, 2014 balances of Accumulated Other Comprehensive (Loss) Income, Distributions in Excess of Net Income, and Noncontrolling Interest - Operating Partnership - Common from previous filings. See Note 2.