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Other Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Marketable securities held in Rabbi Trust $ 46,406 $ 45,254
Deferred tax asset 177 536
Deposits 2,150 2,031
Other 6,125 5,112
Total other assets $ 54,858 $ 52,933