Leases (Tables)

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Schedule of future minimum non-cancelable operating lease payments

Minimum future obligations under all non-cancelable operating leases as of December 31, 2017, are as follows:

	Operating Leases
2018	$	3,631
2019	2,887
2020	1,722
2021	996
2022	954
Thereafter	11,161
Total minimum lease obligations	$	21,351

Summary of operating lease rent expense

Rent expense for operating leases charged to operations was as follows:

	Years Ended December 31,
	2017		2016		2015
Rent expense	$	4,762	$	5,694	$	3,550