Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Foreign Currency Translation:
Beginning balance		$ (5,823)	$ 8,592
Translation adjustment		1,741	7,811
Ending balance		(4,082)	16,403
Derivative Instruments:
Beginning balance		(377)	1,584
Unrealized loss		(1,022)	(2,382)
Reclassification adjustment	[1]	703	726
Ending balance		(696)	(72)
Total accumulated other comprehensive (loss) income		(4,778)	16,331
Less: portion included in noncontrolling interest - operating partnership		(85)	(579)
Total accumulated other comprehensive (loss) income included in shareholders' equity/owners' equity		$ (4,863)	$ 15,752	$ (6,252)

[1] Amounts reclassified out of Accumulated Other Comprehensive (Loss) Income/General & Limited Partner's Equity into contractual interest expense.