Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Summary of Future Minimum Lease Payments

Minimum lease payments under operating leases were as follows at December 31, 2017:

(in thousands)
2018	$	2,739
2019	3,046
2020	2,788
2021	2,360
2022	538
2023 and thereafter	577
Total minimum lease payments	$	12,048