Noncontrolling Interest - Common Shares and Units Activity (Details)	3 Months Ended
	Mar. 31, 2017 shares
Increase (Decrease) in Stockholders' Equity
Ownership percentage by noncontrolling owners	0.03%
Common Shares
Increase (Decrease) in Stockholders' Equity
Outstanding, beginning balance (in shares)	123,994,465
Restricted share and time-based LTIP Unit grants, net of forfeitures (in shares)	69,730
Outstanding, ending balance (in shares)	124,064,195
Common Shares and LTIP Units
Increase (Decrease) in Stockholders' Equity
Outstanding, beginning balance (in shares)	123,994,465
Restricted share and time-based LTIP Unit grants, net of forfeitures (in shares)	109,094
Outstanding, ending balance (in shares)	124,103,559
Noncontrolling Interest | LTIP Units
Increase (Decrease) in Stockholders' Equity
Outstanding, beginning balance (in shares)	0
Restricted share and time-based LTIP Unit grants, net of forfeitures (in shares)	39,364
Outstanding, ending balance (in shares)	39,364