Parent Company Financial Information - Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Balance Sheets [Abstract]
Securities available for sale, at fair value	$ 346,502	$ 340,349
Total assets	1,678,638	1,547,599	$ 1,346,492
Junior subordinated debt	27,724	27,622
Shareholders' equity	201,380	197,835	$ 173,780	$ 167,551
Total liabilities and shareholders' equity	1,678,638	1,547,599
Parent Company
Consolidated Balance Sheets [Abstract]
Cash	4,654	5,571
Securities available for sale, at fair value	8,355	1,486
Investment in subsidiaries	216,340	218,543
Due from subsidiaries	120	85
Other assets	40	18
Total assets	229,509	225,703
Junior subordinated debt	27,724	27,622
Other liabilities	405	246
Shareholders' equity	201,380	197,835
Total liabilities and shareholders' equity	$ 229,509	$ 225,703