Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

As of December 31, 2017, the approximate aggregate minimum future payments required on the operating leases are as follows:

2018	$	35,436
2019	34,927
2020	31,882
2021	28,137
2022	23,954
Thereafter	13,258
Total	$	167,594