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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Lease Payments Under Operating Leases
As of March 31, 2018, future estimated minimum lease payments under non-cancelable operating leases were as follows (in thousands): 
Operating Leases 
Remainder of 2018 $3,020 
20193,490 
20203,276 
20213,216 
20222,931 
Thereafter13,287 
Total minimum lease payments $29,220