Leases - Schedule of Components of Lease Expense (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Finance lease cost:
Total	$ 17,275
Occupancy/Equipment Expense [Member]
Lessee Lease Description [Line Items]
Operating lease cost	17,001
Occupancy Expense [Member]
Finance lease cost:
Amortization of right-of-use assets	651
Short-term lease cost	6
Sub-lease income	(703)
Interest Expense [Member]
Finance lease cost:
Interest on lease liabilities	$ 320