Premises, Equipment, and Leases - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Land	$ 98,804	$ 107,864
Buildings	428,695	461,665
Leasehold improvements	50,032	30,230
Furniture, fixtures, and equipment	205,493	196,469
Fixed assets held-for-sale	9,719	19,617
Premises and equipment, at cost	792,743	815,845
Less accumulated depreciation and amortization	337,737	321,804
Premises and equipment, net	$ 455,006	$ 494,041