Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances (in shares) at Dec. 31, 2017	26,106,623
Balance at Dec. 31, 2017	$ 5,100	$ 526	$ 332,378	$ (12,509)	$ 325,495
Net income			9,617		9,617
Other comprehensive loss				699	699
Cash dividends			(3,263)		(3,263)
Balances (in shares) at Mar. 31, 2018	26,106,623
Balance at Mar. 31, 2018	$ 5,100	526	338,732	(11,810)	332,548
Balances (in shares) at Dec. 31, 2018	26,117,045
Balance at Dec. 31, 2018	$ 5,102	2,539	308,914	(23,423)	293,132
Net income			7,222		7,222
Other comprehensive loss				164	164
Stock based compensation (in shares)	6,647
Stock based compensation	$ 1	(81)	35		(45)
Cash dividends			(3,526)		(3,526)
Balances (in shares) at Mar. 31, 2019	26,123,692
Balance at Mar. 31, 2019	$ 5,103	$ 2,458	$ 312,645	$ (23,259)	$ 296,947