Commitments (Tables)

12 Months Ended

Dec. 31, 2018

Commitments [Abstract]

Schedule of Minimum Lease Payments

At December 31, 2018, future minimum annual lease payments under all noncancelable leases are as follows:

2019	$	75,227
2020	62,974
2021	47,552
2022	38,352
2023	26,580
Thereafter	67,140
	$	317,825