Investment Securities Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($) purchase_agreement	Dec. 31, 2014 USD ($)	Jun. 30, 2014 USD ($)
Investment Securities
FHLB stock	$ 11,300
FRB stock	7,500
Other stock	4,000
Excess FHLB stock with the entity repurchased by FHLB through their stock repurchase program	$ 10,500
Number of inverse putable reverse repurchase of the Bank's secured by collateral | purchase_agreement	3
Value of inverse putable reverse repurchases secured by collateral	$ 28,500
Accumulated other comprehensive income (loss) before tax amount	722	$ 880
Accumulated other comprehensive income, net of tax	(425)	$ 518	$ (22)
HOA
Investment Securities
Value of inverse putable reverse repurchases secured by collateral	19,700
Mortgage-backed securities
Investment Securities
Estimated par value of securities pledged as collateral for the Bank's inverse putable reverse repurchases	65,200
Fair value of securities pledged as collateral for the Bank's inverse putable reverse repurchases	$ 66,800