Accumulated Other Comprehensive Income - Summary of Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($)		3 Months Ended			9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015		Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Amount of income (loss) related to the effective portion of cash flow hedges recognized in other comprehensive loss	[1]	$ 3,727,000	$ (14,959,000)		$ (35,554,000)	$ (14,959,000)
Amounts reclassified from accumulated other comprehensive loss into interest expense	[1]	2,747,000	0	[2]	8,323,000	0	[2]
Unconsolidated Joint Ventures [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Amounts reclassified from accumulated other comprehensive loss into interest expense		0	0		0	0
Amount of income (loss) related to the effective portion recognized in other comprehensive loss	[1],[3]	$ (68,000)	$ 63,000		$ (18,000)	$ (430,000)

[1] Net of amount attributable to the noncontrolling interests in the Operating Partnership.

[2] There were no reclassifications from accumulated other comprehensive loss into interest expense as each swap was a forward starting interest rate swap.

[3] Balance held in accumulated other comprehensive loss relates to foreign currency translation adjustments. No amounts were reclassified from accumulated other comprehensive loss during any of the periods set forth above.