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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Future Minimum Lease Commitments Related to Lease Agreements, Net of Related Lease Incentives
As of December 31, 2016, the future minimum lease commitments related to lease agreements, net of related lease incentives, were as follows:
Years ending December 31,
(dollars in thousands)
Operating leases(1)

2017 
$
16,085

2018 
17,103

2019 
16,004

2020 
15,461

2021 
14,724

Thereafter
95,385

Total minimum lease payments
$
174,762


(1)
Our future minimum lease commitments related to operating leases do not include payments related to Phase Two of our New Headquarters Facility, as that option had not been exercised as of December 31, 2016.