Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets
Securities available-for-sale, cost	$ 434,749	$ 443,928
Securities held-to-maturity, fair value	$ 34,834	$ 36,974
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, authorized (in shares)	30,000,000	30,000,000
Common stock, issued (in shares)	16,715,671	16,641,017
Common stock, outstanding (in shares)	16,715,671	16,641,017
Series B Preferred Stock
Stockholders' equity:
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock, issued (in shares)	32,000	32,000
Preferred stock, outstanding (in shares)	32,000	32,000
Series C Preferred stock
Stockholders' equity:
Preferred stock, authorized (in shares)	100,000	100,000
Preferred stock, issued (in shares)	89,721	89,721
Preferred stock, outstanding (in shares)	89,721	89,721