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Other Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Marketable securities held in Rabbi Trust $ 43,484 $ 45,126
Deferred tax asset 1,550 1,507
Deposits 1,827 4,043
Other 3,672 6,281
Total other assets $ 50,533 $ 56,957