Parent Company Financial Information - Consolidated Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Dividends from subsidiary	$ 334	$ 346	$ 296
Income taxes (benefit)	7,007	6,020	5,202
Net Income	16,301	15,039	12,741
Parent Company
Condensed Financial Statements, Captions [Line Items]
Dividends from subsidiary	16,000	11,000	17,000
Other income	117	80	79
Expenses	1,662	1,156	1,100
Income taxes (benefit)	(526)	(366)	(347)
Income before equity in undistributed earnings of subsidiary	14,981	10,290	16,326
Equity in (distributed) undistributed earnings of subsidiary	1,320	4,749	(3,585)
Net Income	$ 16,301	$ 15,039	$ 12,741