Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income tax based on income from continuing operations	$ 12,666	$ 14,662	$ 34,550	$ 38,256
Effective income tax rate reconciliation, percent			32.20%	27.50%
Provision for change in estimated tax rate	(1,196)	(692)	$ 0	$ 0
Income tax before discrete items	11,470	13,970	34,550	38,256
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount [Abstract]
Exercise of U.S. stock options	(7)	(55)	(7)	(111)
Adjustments to prior period tax liabilities	(1,750)	(160)	(983)	187
Net tax benefit	(46)	(558)	(1,779)	(2,785)
Out-of-period adjustments to deferred tax assets	0	0	1,830	(1,366)
Tax effect of non-deductible foreign exchange loss on intercompany loan	3	0	3,658	0
Changes in valuation allowance	8	(11)	230	830
Other	8	8	5	64
Total income tax expense	$ 9,686	$ 13,194	$ 37,504	$ 35,075