Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Minimum rentals for aggregate lease commitments

The minimum rentals for aggregate lease commitments as of December 31, 2017, were as follows:

2018	$	14,083
2019	9,540
2020	5,721
2021	2,995
2022	1,996
Thereafter	2,596
Total	$	36,931