Equity (Rollforward of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Loss [Line Items]
Accumulated other comprehensive loss, beginning balance	$ (75,706)	$ (60,494)	$ (63,712)
Unrealized gains (losses), net of tax	(15,738)	(15,212)	3,218
Accumulated other comprehensive loss, ending balance	(91,444)	(75,706)	(60,494)
Foreign Currency [Member]
Accumulated Other Comprehensive Loss [Line Items]
Accumulated other comprehensive loss, beginning balance	(65,685)	(65,496)	(62,851)
Unrealized gains (losses), net of tax	1,413	(189)	(2,645)
Accumulated other comprehensive loss, ending balance	(64,272)	(65,685)	(65,496)
Other [Member]
Accumulated Other Comprehensive Loss [Line Items]
Accumulated other comprehensive loss, beginning balance	(10,021)	5,002	(861)
Unrealized gains (losses), net of tax	(17,151)	(15,023)	5,863
Accumulated other comprehensive loss, ending balance	$ (27,172)	$ (10,021)	$ 5,002