Securities (Additional Information) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) investment	Dec. 31, 2016 USD ($) investment
Schedule of Available-for-sale Securities [Line Items]
Carrying value of securities pledged to secure repurchase agreements, public and trust deposits and other by law	$ 180,960	$ 186,572
Original amount in non-controlling investment security in a single banking organization	$ 1,350
Equity Securities
Schedule of Available-for-sale Securities [Line Items]
Number of non-controlling investments in a single banking organization. | investment	1	1
Other than temporary impairment loss, non-controlling investment in single banking organization	$ 997