Commitments (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of of Future Payments Required Under Noncancelable Lease Agreements and Purchase Commitments

As of December 31, 2017, future payments required under noncancelable lease agreements and purchase commitments are as follows:

(in thousands)	Amount
2018	$	4,046
2019	2,262
2020	257
2021	235
2022	235
2023 and thereafter	412
Total	$	7,447