Acquisitions (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Oct. 08, 2021	Feb. 01, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Loans and leases, net	$ 22,740,984			$ 18,735,196
Goodwill	1,405,736			1,078,670	$ 2,548,670
Core deposit and customer relationship intangibles, net	44,957			23,641
Assets	40,443,344			29,498,442
Noninterest-bearing deposits	14,543,133			9,193,827
Interest-bearing deposits	20,454,624			15,746,890
Deposits	34,997,757			24,940,717
Borrowings	0			5,000
Accrued interest payable and other liabilities	582,674			491,962
Liabilities	$ 36,443,714			$ 25,903,491
Civic Acquisition
Business Acquisition [Line Items]
Cash and Due from Banks			$ 37,331
Loans and leases, net			67,294
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment			1,197
Goodwill			125,448
Core deposit and customer relationship intangibles, net			750
Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets Other			75,977
Assets			307,997
Noninterest-bearing deposits			37,339
Interest-bearing deposits			0
Deposits			37,339
Borrowings			50,210
Accrued interest payable and other liabilities			60,028
Liabilities			147,577
Cash paid			160,420
Homeowners Association Services Divison
Business Acquisition [Line Items]
Cash and Due from Banks			4,118,009
Loans and leases, net			6,486
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment			331
Goodwill		$ 201,618
Core deposit and customer relationship intangibles, net			33,300
Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets Other			3,149
Assets		4,362,893
Noninterest-bearing deposits			1,585,810
Interest-bearing deposits			2,536,965
Deposits			4,122,775
Borrowings			0
Accrued interest payable and other liabilities			2,320
Liabilities		4,125,095
Cash paid		$ 237,800	$ 237,798