Equity and Accumulated Other Comprehensive Loss (Changes in Accumulated Other Comprehensive Loss by Component) (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended
	Jun. 30, 2020		Mar. 31, 2020	Jun. 30, 2019		Mar. 31, 2019	Jun. 30, 2020		Jun. 30, 2019		Dec. 31, 2019	Dec. 31, 2018
Equity and Accumulated Other Comprehensive Loss [Abstract]
Foreign currency translation, Beginning balance	$ (108,591)		$ (91,472)	$ (89,848)		$ (86,044)	$ (91,472)		$ (86,044)
Foreign currency translation, Other comprehensive income (loss) before reclassifications	1,821			2,311			(15,298)		(1,493)
Foreign currency translation, Net other comprehensive income (loss), net of tax	1,821			2,311			(15,298)		(1,493)
Foreign currency translation, Ending balance	(106,770)		(108,591)	(87,537)		(89,848)	(106,770)		(87,537)
Unrealized gain (loss) on on derivatives, Beginning balance	(3,655)			334		292			292
Unrealized gain (loss) on on derivatives, Other comprehensive income (loss) before reclassifications	372			123			(3,410)		336
Unrealized gain (loss) on on derivatives, Amounts reclassified from accumulated other comprehensive loss	838			(235)			965		(406)
Unrealized gain (loss) on on derivatives, Net other comprehensive income (loss), net of tax	1,210	[1]	(3,655)	(112)	[1]	42	(2,445)	[1]	(70)	[1]
Unrealized gain (loss) on on derivatives, Ending balance	(2,445)		(3,655)	222		334	(2,445)		222
Total, Other comprehensive income (loss) before reclassifications	2,193			2,434			(18,708)		(1,157)
Total, Amounts reclassified from accumulated other comprehensive loss	838			(235)			965		(406)
Total, Net other comprehensive income (loss), net of tax	3,031			2,199			(17,743)		(1,563)
Accumulated other comprehensive income (loss), net of tax, total	$ (109,215)		$ (112,246)	$ (87,315)		$ (89,514)	$ (109,215)		$ (87,315)		$ (91,472)	$ (85,752)

[1] Net of tax expense (benefit) of $322 and $(30) for the three months ended June 30, 2020 and 2019, respectively. Net of tax benefit of $(650) and $(19) for the six months ended June 30, 2020 and 2019, respectively.