Leases - Schedule of Supplemental Balance Sheet Information Related to Leases (Detail) $ in Thousands	Dec. 31, 2019 USD ($)
Operating Leases
Operating lease right-of-use assets	$ 95,477
Operating lease liabilities	99,500
Finance Leases
Premises and equipment, net	7,170
Other borrowings	$ 7,406
Weighted-Average Remaining Lease Term (in Years)
Operating leases	10 years 7 months 6 days
Finance leases	11 years 3 months 18 days
Weighted-Average Discount Rate
Operating leases	3.45%
Finance leases	4.43%