Leases - Other information regarding our leases (Detail) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows used in operating leases	$ 5,791	$ 11,908
Operating cash flows used in financing leases	16	27
Financing cash flows used in financing leases	258	383
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 768	$ 1,047
Weighted average remaining lease term
Operating leases	8 years	8 years
Financing leases	1 year	1 year
Weighted average discount rate
Operating leases	10.30%	10.30%
Financing leases	8.50%	8.50%