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Income Taxes - Income from Continuing Operations before Income Taxes Attributable to Geographic Locations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Domestic $ 215,010 $ 123,153 $ (46,876)
Foreign (55,151) 87,845 131,609
Income from continuing operations before income taxes $ 159,859 $ 210,998 $ 84,733