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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Leases, Operating [Abstract]      
Expense for operating leases $ 24,800 $ 24,400 $ 25,400
Future minimum operating lease payments      
2016 14,781    
2017 11,908    
2018 9,941    
2019 5,527    
2020 3,011    
Thereafter 8,942    
Total future minimum operating lease payments $ 54,110