Stockholders' Equity (Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 908,326	$ 800,672	$ 706,255
Net foreign currency translation adjustment	(9,697)	4,531	4,262
Actuarial gain (loss) on pension plans	2,107	(207)	0
Derivative instrument adjustment	0	1,642	(534)
Net current-period other comprehensive income (loss)	(7,590)	5,966
Ending Balance	1,092,875	908,326	800,672
Accumulated Other Comprehensive (Loss) Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	7,089	1,123	(2,605)
Ending Balance	(501)	7,089	1,123
Foreign currency items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	7,296	2,765
Net foreign currency translation adjustment	(9,697)	4,531
Actuarial gain (loss) on pension plans	0	0
Derivative instrument adjustment		0
Net current-period other comprehensive income (loss)	(9,697)	4,531
Ending Balance	(2,401)	7,296	2,765
Pension items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(207)	0
Net foreign currency translation adjustment	0	0
Actuarial gain (loss) on pension plans	2,107	(207)
Derivative instrument adjustment		0
Net current-period other comprehensive income (loss)	2,107	(207)
Ending Balance	1,900	(207)	0
Derivative instrument items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0	(1,642)
Net foreign currency translation adjustment	0	0
Actuarial gain (loss) on pension plans	0	0
Derivative instrument adjustment		1,642
Net current-period other comprehensive income (loss)	0	1,642
Ending Balance	$ 0	$ 0	$ (1,642)