Leases (Tables)

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Future minimum lease payments under non-cancelable operating leases at December 31, 2017 were as follows:

Years ending December 31,
2018	$	47,820
2019	39,107
2020	30,180
2021	22,266
2022	15,256
Thereafter	63,685
Total minimum lease payments	$	218,314