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Goodwill and Related Intangible Assets (Schedule of Amortization Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization of Intangible Assets $ 9,637 $ 12,679 $ 5,720