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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure  
Schedule of future minimum rental payments for operating leases
(in thousands)      
2016   $ 12,013  
2017     10,974  
2018     9,823  
2019     7,521  
2020     4,708  
Thereafter     7,406  
Total rental commitments   $ 52,445