Derivatives and Hedging Activities (Derivative Financial Instruments included in OCI and Current Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	$ (5,448)	$ (7,649)	$ 4,715	$ (25,599)
Derivatives designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) gain reclassified from OCI into interest income or interest expense (effective portion)	(7,020)	3,515	(13,259)	8,020
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Other income	88	(282)	237	(695)
Other expense | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Other income	98	32	370	121
Changes in fair value of mortgage derivatives | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Other income	(208)	(89)	(285)	(172)
Total | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Mortgage banking income	198	(225)	152	(644)
Derivatives designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	$ (5,448)	$ (7,649)	$ 4,715	$ (25,599)