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Commitments and Contingencies (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Disclosure threshold for future non-cancelable purchase and service obligations greater than $100,000 and one year
Non-cancelable purchase and service obligations [Abstract]  
2018 $ 11,562
2019 5,976
2020 4,480
2021 2,430
2022 1,330
Total obligations $ 25,778