Income Taxes (Schedule of Components of Income Tax (Benefit)/Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income tax based on income from continuing operations, at estimated tax rates of 32%, 35%, and 32%, respectively	$ 17,519	$ 27,629	$ 16,388
Income tax before discrete items	17,519	27,629	16,388
Discrete tax expense (benefit):
Worthless stock deduction			(28,553)
Net impact of mandatory deemed repatriations	5,758
Provision for/resolution of tax audits and contingencies, net	1,329	(2,856)	6,500
Adjustments to prior period tax liabilities	(840)	586	(867)
Provision for/adjustment to beginning of year valuation allowances	(3,522)	(88)	75
Enacted tax legislation	1,879	183	670
Total income tax expense/(benefit)	$ 22,123	$ 25,454	$ (5,787)
Estimated tax rate	32.00%	35.00%	32.00%