Leases (Lessee) - Summary of Supplemental Cash Flow Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,459
Operating cash flows from finance leases	10
Financing cash flows from finance leases	21
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 1,042