Income Taxes (Schedule of Components of Income Tax (Benefit)/Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax based on income from continuing operations, at estimated tax rates of 31%, 32%, and 35%, respectively	$ 36,044	$ 17,519	$ 27,629
Income tax before discrete items	36,044	17,519	27,629
Discrete tax expense (benefit):
Worthless stock deduction
Net impact of mandatory deemed repatriations	(1,003)	5,758
Provision for/resolution of tax audits and contingencies, net	1,286	1,329	(2,856)
Adjustments to prior period tax liabilities	(1,284)	(840)	586
Provision for/adjustment to beginning of year valuation allowances	(4,882)	(3,522)	(88)
Enacted tax legislation	2,067	1,879	183
Total income tax expense	$ 32,228	$ 22,123	$ 25,454
Estimated tax rate	31.00%	32.00%	35.00%