Investment in Unconsolidated Joint Ventures Investment in Unconsolidated Joint Ventures Income Statement Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Revenue	$ 5,995	$ 5,800	$ 2,424
Costs and expenses	5,849	3,527	1,147
Income (loss)	146	2,273	1,277
Equity in Income (loss) from unconsolidated joint ventures	$ 477	$ 499	$ 347