Investments in Qualified Affordable Housing Projects (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Carrying value of qualified affordable housing project investments	$ 8,021		$ 8,021		$ 8,993
Tax credit amortization	324	$ 289	972	$ 866
Tax credits and other benefits	(471)	(403)	(1,412)	(1,300)
Total	$ (147)	$ (114)	$ (440)	$ (434)