Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income tax based on income from continuing operations, at estimated tax rates of 30.1% and 32.8%, respectively	$ 11,239	$ 989	$ 15,779	$ 6,744
Provision for change in estimated tax rates	(359)	36
Income tax before discrete items	10,880	1,025	15,779	6,744
Discrete tax expense:
Exercise of US Stock Options	(3)		(126)	(55)
Impact of mandatory repatriation	(1,099)		(1,099)
Adjustments to prior period tax liabilities	(206)	189	(252)	189
Provision for/resolution of tax audits and contingencies, net	2,443	599	2,448	1,451
Changes in valuation allowance	(4,986)		(4,986)
Other	2	(34)	(124)
Total income tax expense	$ 7,031	$ 1,779	$ 11,640	$ 8,329