Investment in Qualified Affordable Housing (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	$ 1,800	$ 1,700
Affordable Housing Program Obligation	17,464		$ 20,311
Affordable Housing Tax Credits and Other Tax Benefits, Amount	2,300	$ 2,300
Qualified Affordable Housing [Domain]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	$ 49,411		$ 51,247