CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Securities held to maturity, fair value (in dollars)	$ 53,249	$ 39,196
Preferred stock, no par value	$ 0	$ 0
Preferred stock, shares authorized	100,000	100,000
Class A Common Stock
Common Stock, no par value	$ 0	$ 0
Common Stock, shares authorized	30,000,000	30,000,000
Common Stock, issued	18,614,961	18,651,841
Common Stock, outstanding	18,614,961	18,651,841
Class B Common Stock
Common Stock, no par value	$ 0	$ 0
Common Stock, shares authorized	5,000,000	5,000,000
Common Stock, issued	2,245,011	2,245,250
Common Stock, outstanding	2,245,011	2,245,250