CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Unamortized Cost of Equity Awards	Retained Earnings	Foreign Currency Translation Adjustments	Accumulated income (loss) on derivatives	Pension Adjustments	Total
Balances at Dec. 31, 2018	$ 36,779	$ (3,166)	$ 76,718	$ (7,946)	$ 434	$ (1,006)	$ 101,813
Balances (in shares) at Dec. 31, 2018	14,228
Increase (Decrease) in Stockholders' Equity
Stock transactions under employee benefit stock plans	$ 1,089						1,089
Stock transactions under employee benefit stock plans (in shares)	40
Issuance of restricted stock, net of forfeitures	$ 4,520	(4,191)					329
Issuance of restricted stock, net of forfeitures (in shares)	161
Stock-based compensation expense		2,851					2,851
Shares withheld for payment of employee payroll taxes	$ (746)						(746)
Shares withheld for payment of employee payroll taxes (in shares)	(30)
Comprehensive (loss) income				(680)	(929)	(808)	(2,417)
Tax effect					218	186	404
Net income			17,022				17,022
Dividends to stockholders			(1,151)				(1,151)
Balances at Dec. 31, 2019	$ 41,642	(4,506)	92,589	(8,626)	(277)	(1,628)	119,194
Balances (in shares) at Dec. 31, 2019	14,399
Increase (Decrease) in Stockholders' Equity
Stock transactions under employee benefit stock plans	$ 1,252						1,252
Stock transactions under employee benefit stock plans (in shares)	48
Issuance of restricted stock, net of forfeitures	$ 5,223	(4,851)					372
Issuance of restricted stock, net of forfeitures (in shares)	231
Stock-based compensation expense		3,550					3,550
Shares withheld for payment of employee payroll taxes	$ (1,032)						(1,032)
Shares withheld for payment of employee payroll taxes (in shares)	(46)
Comprehensive (loss) income				8,410	(1,526)	(5)	6,879
Tax effect					365		365
Net income			13,643				13,643
Dividends to stockholders			(1,167)				(1,167)
Balances at Dec. 31, 2020	$ 47,085	(5,807)	105,065	(216)	(1,438)	(1,633)	$ 143,056
Balances (in shares) at Dec. 31, 2020	14,632						14,632
Increase (Decrease) in Stockholders' Equity
Stock transactions under employee benefit stock plans	$ 988						$ 988
Stock transactions under employee benefit stock plans (in shares)	32
Issuance of restricted stock, net of forfeitures	$ 3,465	(3,363)					102
Issuance of restricted stock, net of forfeitures (in shares)	96
Stock-based compensation expense		4,161					4,161
Shares withheld for payment of employee payroll taxes	$ (1,928)						(1,928)
Shares withheld for payment of employee payroll taxes (in shares)	(52)
Common stock issued in connection with acquisitions (Note 2)	$ 23,496						23,496
Common stock issued in connection with acquisitions (Note 2) (in shares)	653
Comprehensive (loss) income				(7,193)	2,110	997	(4,086)
Tax effect					(492)	(227)	(719)
Net income			24,094				24,094
Dividends to stockholders			(1,402)				(1,402)
Balances at Dec. 31, 2021	$ 73,106	$ (5,009)	$ 127,757	$ (7,409)	$ 180	$ (863)	$ 187,762
Balances (in shares) at Dec. 31, 2021	15,361						15,361