Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum lease payments under operating leases

Future minimum lease payments under operating leases at December 31, 2017 are as follows (in thousands):

Year ending December 31,	Minimum Lease Payments
2018	$	2,734
2019	2,434
2020	2,169
2021	1,973
2022	1,988
Thereafter	10,508
Total	$	21,806