Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Securities available-for-sale, cost	$ 443,928	$ 310,484
Securities held-to-maturity, fair value	$ 36,974	$ 80,920
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)	16,641,017	16,548,829
Common stock, outstanding (in shares)	16,641,017	16,548,829
Series B Preferred stock
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
Preferred stock, authorized (in shares)	100,000	100,000
Preferred stock, issued (in shares)	89,721	89,875
Preferred stock, outstanding (in shares)	89,721	89,875