Leases - Schedule of Quantitative Information Related to Leases (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)		Jun. 30, 2019 USD ($)
Lease expenses
Fixed lease expenses - operating	$ 3,335	[1]	$ 6,705	[1]
Variable lease expenses - operating	2,248	[1]	4,634	[1]
Sublease income	(1,149)	[1]	(2,257)	[1]
Total lease expenses	4,434	[1]	9,082	[1]
Other information
Gross operating cash flows for operating leases	(8,003)	[2]	(18,103)	[2]
Operating cash flows from subleases	$ 1,055	[2]	$ 2,305	[2]
Weighted average remaining lease term (in months) – operating leases	70 months		70 months
Weighted average discount rate – operating leases	5.40%		5.40%

[1] Lease expense and sublease income represent the amount recorded within our unaudited condensed consolidated statement of (loss) income and comprehensive (loss) income. 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, including continuing and discontinued operations, and represent cash payments for fixed and variable lease costs.