Summary of Significant Accounting Policies Summary of Significant Accounting Policies - FF&E (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Accumulated Depreciation	$ 34,903	$ 29,108	$ 27,569	$ 23,779
Furniture, Fixtures, and Equipment
Property, Plant and Equipment [Line Items]
Accumulated Depreciation	$ 9,900	$ 8,100
Furniture, Fixtures, and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Furniture, Fixtures, and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years