Basis of Presentation Basis of Presentation (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) vie shares	Mar. 31, 2015 USD ($) shares	Dec. 31, 2015 USD ($)
Organization and Offering
Variable interest entities, count | vie	5
Deferred financing costs	$ 10,015
Common Stock
Organization and Offering
Stock repurchased during period, shares | shares	295,452	174,339
Treasury Stock
Organization and Offering
Prior period reclassification adjustment		$ (4,700)
Additional Paid In Capital
Organization and Offering
Prior period reclassification adjustment		$ (4,700)
Accounting Standards Update 2015-02
Organization and Offering
Variable interest entities, count | vie	5
Accounting Standards Update 2015-03 | Other assets
Organization and Offering
Deferred financing costs			$ (8,600)
Accounting Standards Update 2015-03 | Non recourse debt
Organization and Offering
Deferred financing costs			$ 8,600
Consolidated Entities
Organization and Offering
Variable interest entities, count | vie	4
Equity Method Investee
Organization and Offering
Variable interest entities, count | vie	1