Leases (Lessee) - Summary of Supplemental Cash Flow Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 2,929
Operating cash flows from finance leases	52
Financing cash flows from finance leases	10
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 1,042