Leases

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Leases

13. Leases

The Company is obligated under certain operating leases to rent space for its facilities and other office space. The original terms of the leases typically range from five to 30 years, with optional renewal periods.

Aggregate minimum lease payments under non-cancelable operating leases with original or remaining lease terms in excess of one year were as follows at December 31, 2018 (in thousands):

2019	$	64,958
2020		61,704
2021		57,195
2022		51,570
2023		47,684
Thereafter		777,684
Total minimum rental obligations	$	1,060,795

During the years ended December 31, 2018, 2017 and 2016, rent expense was $80.3 million, $76.8 million and $73.3 million, respectively.