SCHEDULE III-Consolidated Real Estate and Accumulated Depreciation Rollforward (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Real estate assets
Balance, beginning of period		$ 2,246,028	$ 2,136,824	$ 1,995,417
Improvements		59,199	119,719	154,594
Cost of Real Estate Sold		0	(7,396)	0
Other	[1]	(4,221)	(3,119)	(13,187)
Balance, end of period		2,301,006	2,246,028	2,136,824
Accumulated depreciation
Balance, beginning of period		411,166	361,424	318,581
Additions-depreciation		62,515	54,534	55,159
Cost of Real Estate Sold		0	(2,334)	0
Other	[1]	(4,221)	(2,458)	(12,316)
Balance, end of period		$ 469,460	$ 411,166	$ 361,424

[1] Other deductions for the years ended December 31, 2016, 2015 and 2014 represent the write-off of fully depreciated assets.