Lease Commitments (Tables)

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Schedule of Future Minimum Cash Commitments Under Operating Leases

We lease certain of our office facilities and equipment under various operating leases. Future minimum cash commitments under operating leases as of December 31, 2017 were as follows (in thousands):

Year Ending December 31,	Gross Operating Lease Commitments		Sub-Leases		Net Operating Lease Commitments
2018	$	35,239	$	283	$	34,956
2019		31,459		234		31,225
2020		26,793		234		26,559
2021		21,451		-		21,451
2022		18,979		—		18,979
Thereafter		70,244		—		70,244
Total	$	204,165	$	751	$	203,414