Derivatives (Effects of Derivative Instruments on the Statements of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Derivative income reflected in income statement	$ 24,871	$ 25,261	$ 43,578
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member] | Interest Rate Swaps - Variable Rate Loans [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest and Fee Income, Loan and Lease, Held-in-Portfolio	Interest and Fee Income, Loan and Lease, Held-in-Portfolio	Interest and Fee Income, Loan and Lease, Held-in-Portfolio
Derivative income reflected in income statement	$ 40,714	$ 9,928	$ 26,674
Derivatives Designated as Hedging Instruments [Member] | Fair Value Hedging [Member] | Interest Rate Swaps - Securities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest Income, Securities, Operating, Taxable	Interest Income, Securities, Operating, Taxable	Interest Income, Securities, Operating, Taxable
Derivative income reflected in income statement	$ 11,945	$ (4,963)	$ 640
Derivatives Designated as Hedging Instruments [Member] | Fair Value Hedging [Member] | Securities Termination [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Debt and Equity Securities, Gain (Loss)	Debt and Equity Securities, Gain (Loss)	Debt and Equity Securities, Gain (Loss)
Derivative income reflected in income statement	$ 2,725	$ 1,620	$ 2,499
Derivatives Not Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other	Noninterest Income, Other	Noninterest Income, Other
Derivative income reflected in income statement	$ 420	$ 5,832	$ 13,477
Derivatives Not Designated as Hedging Instruments [Member] | Residential mortgage banking
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income	Noninterest Income	Noninterest Income
Derivative income reflected in income statement	$ 753	$ 2,918	$ 1,568