Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income tax based on income from continuing operations, at estimated tax rates of 37.5% in 2016 and 38.0% in 2015	$ 7,838	$ 8,331	$ 21,545	$ 15,285
Effect of change in estimated tax rate	(424)	(1,002)
Income tax expense before discrete items	7,414	7,329	21,545	15,285
Discrete tax expense/(benefit):
Provision for/resolution of tax audits and contingencies, net		4,521	(825)	4,505
Adjustments to prior period tax liabilities	(11)	(581)	(254)	(641)
Other discrete tax adjustments, net	85	968	113	1,152
Enacted tax legislation		6	34	97
Total income tax expense	$ 7,488	$ 12,243	$ 20,613	$ 20,398