Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

Future Minimum Operating Lease Payments

Future minimum operating lease payments at December 31, 2018, are as follows:

2019	$	26,554
2020		22,349
2021		18,430
2022		13,552
2023		9,041
Thereafter		8,697
Total minimum operating lease payments	$	98,623