Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income tax based on income from continuing operations, at estimated tax rates of 27.5% and 29.7%, respectively	$ 14,662	$ 11,691	$ 38,256	$ 25,970
Effect of change in estimated tax rates	(692)	(191)
Income tax before discrete items	13,970	11,500	38,256	25,970
Discrete tax expense:
Exercise of U.S. Stock Options	(55)	(29)	(111)	(155)
Impact of mandatory repatriation				(1,099)
Adjustments to prior period tax liabilities	(160)	(7)	187	(259)
Provision for/resolution of tax audits and contingencies, net	(558)	(168)	(2,785)	2,280
Adjustment related to prior period change in opening valuation allowance		63	(1,366)	(4,923)
Changes in valuation allowances	(11)		830
Other	8		64	(124)
Total income tax expense	$ 13,194	$ 11,359	$ 35,075	$ 21,690