Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income tax based on income from continuing operations, at estimated tax rates of 28.4% and 30.1%, respectively	$ 13,821	$ 11,080	$ 24,668	$ 14,736
provision for change in estimated tax rates	(382)	(266)	(382)	(266)
Income tax before discrete items	13,439	10,814	24,286	14,470
Discrete tax expense:
Exercise of U.S. Stock Options	(6)	(3)	(56)	(126)
Impact of Mandatory Repatriation		(1,099)		(1,099)
Adjustments to prior period tax liabilities	153	(206)	347	(252)
Provision for/resolution of tax audits and contingencies, net	5	2,443	(2,227)	2,448
Adjustment related to prior period change in opening valuation allowance			(1,346)
Other changes in valuation allowances	841	(4,986)	841	(4,986)
Other	(27)	3	36	(124)
Total income tax expense	$ 14,405	$ 6,966	$ 21,881	$ 10,331