Annual report pursuant to Section 13 and 15(d)

Income Taxes (Consolidated Income from Continuing Operations Before Income Taxes) (Details)

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Income Taxes (Consolidated Income from Continuing Operations Before Income Taxes) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
U.S. operations $ 173,966 $ 118,743 $ 88,561
Foreign operations 73,353 79,778 42,865
Income before income tax $ 247,319 $ 198,521 $ 131,426