Acquisitions (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021	Oct. 08, 2021	Feb. 01, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Loans and leases, net	[1]	$ 28,408,397	$ 22,740,984
Goodwill		1,376,736	1,405,736			$ 1,078,670
Core deposit and customer relationship intangibles, net		31,381	44,957
Assets		41,228,936	40,443,344
Noninterest-bearing deposits		11,212,357	14,543,133
Interest-bearing deposits		22,723,977	20,454,624
Deposits		33,936,334	34,997,757
Borrowings (including $132,030 at fair value)		1,764,030	0
Accrued interest payable and other liabilities		710,954	582,674
Liabilities		$ 37,278,405	36,443,714
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 (including $132,030 at fair value)					50,210
Accrued interest payable and other liabilities					60,028
Liabilities					147,577
Cash paid			$ (160,420)		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 (including $132,030 at fair value)					0
Accrued interest payable and other liabilities					2,320
Liabilities				4,125,095
Cash paid				$ 237,800	$ 237,798

[1] Excludes accrued interest receivable of $124.3 million and $80.3 million at December 31, 2022 and 2021, which is recorded in "Other assets" on the consolidated balance sheets.