Securities - Additional Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($) securities	Dec. 31, 2014 USD ($) securities
Investments, Debt and Equity Securities [Abstract]
Tax provision related to the net realized gains	$ 65
Carrying value of securities	$ 168,359	$ 177,060
Number of securities | securities	46	38
Total Aggregate Losses	$ 1,898	$ 1,464