Condensed Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balances at Dec. 31, 2017	$ 457,078	$ 275,059	$ 185,570	$ (3,551)
Net income	12,804		12,804
Other comprehensive income (loss), net of tax	(5,861)			(5,861)
Amortization of unearned compensation	61	61
Exercise of stock options	100	100
Stock option expense	82	82
Reclassification of tax adjustment on accumulated other comprehensive loss			766	(766)
Cash dividends on common stock ($0.10 per share)	(3,848)		(3,848)
Ending Balances at Mar. 31, 2018	460,416	275,302	195,292	(10,178)
Beginning Balances at Dec. 31, 2018	491,992	276,101	224,035	(8,144)
Net income	10,816		10,816
Other comprehensive income (loss), net of tax	8,322			8,322
Amortization of unearned compensation	91	91
Exercise of stock options	117	117
Stock option expense	57	57
Stock issued stock plans	(125)	(125)
Stock issued in Salin acquisition	102,722	102,722
Cash dividends on common stock ($0.10 per share)	(4,524)		(4,524)
Ending Balances at Mar. 31, 2019	$ 609,468	$ 378,963	$ 230,327	$ 178