Summary of Significant Accounting Policies Schedule of Variable Interest Entities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Current Fiscal Year End Date	--12-31
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	$ 8,175	$ 17,948
Noncontrolling Interest in Variable Interest Entity	17,565	11,058
Real Estate [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	86,440	81,424
Cash and Cash Equivalents [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 3,444	$ 790