Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

Future Minimum Lease Payments Due Under Non-Cancelable Operating Leases

Future minimum lease payments, by year and in the aggregate, under non-cancelable operating leases with initial or remaining terms of one year or more as of December 31, 2018 are as follows:

Years ending December 31,
2019	$	4,161
2020		3,733
2021		3,139
2022		2,294
2023		1,960
Thereafter		3,045
	$	18,332