Equity - Changes in Other Comprehensive Income (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ 1,462,531
Ending Balance	1,471,117
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(1,939)
Other comprehensive loss before reclassifications	(7,688)
Amounts of loss reclassified from accumulated other comprehensive income to interest expense	2,107
Ending Balance	$ (7,520)