Acquisition and Divestiture - Summary of Acquisition, Pro Forma Information (Details) - Peoples United Financial Inc [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total revenues	$ 3,900,483	[1]
Net income	$ 757,459

[1] Represents the total of net interest income and other income.