Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Approximate Aggregate Minimum Future Rental Payments Required

As of December 31, 2018, the approximate aggregate minimum future rental payments required were as follows (in thousands):

2019	$	15,872
2020	13,535
2021	5,153
2022	3,768
2023	3,000
Thereafter	4,629
Total (1)	$	45,957

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(1) Minimum future rental payments are recorded at their gross amounts and have not been reduced by sublease rentals of $0.5 million for 2019 for approximately 7,000 of aggregate square footage for former Cogent office space in New York and London.