Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income tax based on income from continuing operations, at estimated tax rates of 29.4% and 32.5%, respectively	$ 10,847	$ 3,656
Income tax before discrete items	10,847	3,656
Discrete tax expense:
Exercise of U.S. Stock Options	(50)	(123)
Adjustments to prior period tax liabilities	194	(46)
Provision for resolution of tax audits and contingencies, net	(2,232)	5
Adjustment related to prior period change in opening valuation allowance	(1,346)
Other	63	(127)
Total income tax expense	$ 7,476	$ 3,365