Schedule III Real Estate and Accumulated Depreciation - Rollforwards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property
Balance, beginning of period	$ 1,146,548	$ 1,048,525	$ 829,508
Additions - property acquisitions			23,360
Additions - improvements	148,587	98,969	195,657
Proceeds from real estate disposal	2,399	(946)
Balance, end of period	1,295,135	1,146,548	1,048,525
Accumulated Depreciation
Balance, beginning of period	215,978	155,704	105,433
Additions, net of disposals	68,241	60,274	50,271
Balance, end of period	$ 284,219	$ 215,978	$ 155,704