Income Taxes Components of Income Before Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Income Before Income Tax [Line Items]
Income Before Income Tax Expense From Continuing Operations Net Of Noncontrolling Interest	$ 119,893	$ 155,630	$ 118,556
United States [Member]
Schedule Of Income Before Income Tax [Line Items]
Income Before Income Tax Expense From Continuing Operations Net Of Noncontrolling Interest	81,157	124,747	89,821
Non-US [Member]
Schedule Of Income Before Income Tax [Line Items]
Income Before Income Tax Expense From Continuing Operations Net Of Noncontrolling Interest	$ 38,736	$ 30,883	$ 28,735