Investments in Qualified Affordable Housing Projects - (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Carrying value of qualified affordable housing project investments	$ 8,345		$ 8,345		$ 8,993
Tax credit amortization	324	$ 289	648	$ 577
Tax credits and other benefits	(471)	(467)	(941)	(897)
Total	$ (147)	$ (178)	$ (293)	$ (320)