Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Taxes [Abstract]
Income tax based on income from continuing operations, at estimated tax rates of 38.0% and 34.9%, respectively	$ 8,331	$ 6,470	$ 15,285	$ 19,226
Provision for change in estimated tax rates	(1,002)	(243)
Income tax before discrete items	7,329	6,227	$ 15,285	$ 19,226
Provision for/resolution of tax audits and contingencies, net	4,521	$ 330	4,505	1,310
Other discrete tax adjustments, net	968		1,152	3
Adjustments to prior period tax liabilities	$ (581)	$ 205	$ (641)	459
Provision for/adjustment to beginning of year valuation allowance				$ 437
Enacted tax legislation	$ 6		$ 97
Total income tax expense	$ 12,243	$ 6,762	$ 20,398	$ 21,435
Estimated tax rate			38.00%	34.90%