Leases (Additional Information) (Detail) - USD ($) $ in Thousands	Jan. 01, 2019	Jun. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 44,900	$ 39,229	$ 41,754
Operating lease liabilities	46,100	$ 40,221	$ 42,815
Deferred gains associated with sale and leaseback transactions	$ 5,900
Weighted-average remaining lease term		9 years 3 months 18 days
Weighted-average discount rate		3.44%