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Leases - Schedule of Quantitative Information Related to Leases (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Lease expenses        
Fixed lease expenses - operating [1] $ 3,116 $ 3,335 $ 6,264 $ 6,705
Variable lease expenses - operating [1] 650 2,248 2,565 4,634
Sublease income [1] (563) (1,149) (1,351) (2,257)
Total lease expenses [1] 3,203 4,434 7,478 9,082
Other information        
Gross operating cash flows for operating leases [2] (5,930) (8,003) (12,120) (18,103)
Operating cash flows from subleases [2] $ 558 $ 1,055 $ 1,234 $ 2,305
Weighted average remaining lease term (in months) – operating leases 73 months 70 months 73 months 70 months
Weighted average discount rate – operating leases 5.00% 5.40% 5.00% 5.40%
[1] Lease expense and sublease income represent the amount recorded within our unaudited condensed consolidated statements of income (loss). Variable lease amounts represent expenses recognized as incurred which are not included in the lease liability. Fixed lease expenses and sublease income are recorded on a straight-line basis over the lease term and therefore are not necessarily representative of cash payments during the same period.
[2] Cash flows are presented on a consolidated basis and represent cash payments for fixed and variable lease costs.