CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
BALANCE at Dec. 31, 2018	$ 182,498	$ 327	$ 181,815	$ 105,212		$ (431)
BALANCE, Shares at Dec. 31, 2018		32,723,972
BALANCE, Treasury Stock, Value at Dec. 31, 2018					$ (104,425)
BALANCE, Treasury Stock, Shares at Dec. 31, 2018					(2,808,361)
Net income	8,834			8,834
Issuance of common stock awards to employees, value		$ 1	(1)
Issuance of common stock awards to employees, shares		56,995
Surrender of common stock awards, value	(4)				$ (4)
Surrender of common stock awards, shares					(643)
Share-based compensation expense	2,022		2,022
Other comprehensive income (loss), net of tax	(2,749)					(2,749)
BALANCE at Mar. 31, 2019	190,601	$ 328	183,836	114,046		(3,180)
BALANCE, Shares at Mar. 31, 2019		32,780,967
BALANCE, Treasury Stock, Value at Mar. 31, 2019					$ (104,429)
BALANCE, Treasury Stock, Shares at Mar. 31, 2019					(2,809,004)
BALANCE at Dec. 31, 2019	$ 250,031	$ 329	190,230	173,371		(7,143)
BALANCE, Shares at Dec. 31, 2019	32,871,504	32,871,504
BALANCE, Treasury Stock, Value at Dec. 31, 2019	$ (106,756)				$ (106,756)
BALANCE, Treasury Stock, Shares at Dec. 31, 2019	(2,855,164)				(2,855,164)
Net income	$ 15,988			15,988
Cumulative effect of accounting changes, net of tax	(1,190)			(1,190)
Issuance of common stock awards to employees, value		$ 1	(1)
Issuance of common stock awards to employees, shares		89,957
Surrender of common stock awards, shares					(1,759)
Share-based compensation expense	2,302		2,302
Share-based compensation issued to directors, value	33		33
Share-based compensation issued to directors, shares		316
Common stock repurchase, value	(15,759)				$ (15,759)
Common stock repurchase, shares					(442,542)
Other comprehensive income (loss), net of tax	(5,608)					(5,608)
BALANCE at Mar. 31, 2020	$ 245,797	$ 330	$ 192,564	$ 188,169		$ (12,751)
BALANCE, Shares at Mar. 31, 2020	32,961,777	32,961,777
BALANCE, Treasury Stock, Value at Mar. 31, 2020	$ (122,515)				$ (122,515)
BALANCE, Treasury Stock, Shares at Mar. 31, 2020	(3,299,465)				(3,299,465)