Schedule III Real Estate and Accumulated Depreciation (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property
Balance, beginning of period	$ 829,508	$ 741,981	$ 624,122
Additions - property acquisitions	23,360
Additions - improvements	195,657	87,527	117,859
Balance, end of period	1,048,525	829,508	741,981
Accumulated Depreciation
Balance, beginning of period	105,433	64,428	32,943
Additions - depreciation, net of disposals	50,271	41,005	31,485
Balance, end of period	$ 155,704	$ 105,433	$ 64,428