Schedule III (Consolidated) - Real Estate and Accumulated Depreciation - Reconciliation of Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of the year	$ 64,069	$ 58,132	$ 53,496
Depreciation expense	6,002	6,204	5,694
Amounts retired or adjusted	(2,722)	(267)	(1,058)
Balance at the end of the year	$ 67,349	$ 64,069	$ 58,132