Leases - Schedule of Components of Lease Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Finance lease cost:
Total	$ 9,298	$ 4,463
Occupancy/equipment expense
Lessee, Lease, Description [Line Items]
Operating lease cost	9,181	4,402
Occupancy expense
Finance lease cost:
Amortization of right-of-use assets	166	158
Short-term lease cost	1	1
Sub-lease income	(128)	(179)
Interest Expense
Finance lease cost:
Interest on lease liabilities	$ 78	$ 81