Accumulated Other Comprehensive Loss (Components of Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Net unrealized gains (losses), before tax	$ 93	$ (13,096)
Income tax benefit/(expense) related to other comprehensive income	(24)	3,503
Other comprehensive (loss)/income, net of tax	69	(9,593)
Accumulated Other Comprehensive Loss [Member]
Unrealized net gains (losses), net of tax	(210)		$ (13,133)
Recognized gains (losses), net of tax	(279)		(1,421)
Other comprehensive (loss)/income, net of tax	69	(9,593)
Investment securities- with OTTI [Member]
Unrealized holding (losses)/gains on investments	(1,606)	141
Recognized gains (losses), before tax	50	50
Net unrealized gains (losses), before tax	(1,656)	91
Unrealized tax (expense) benefit	426	(38)
Income tax benefit/(expense) related to other comprehensive income	439	(25)
Unrealized net gains (losses), net of tax	(1,180)	103	(614)
Recognized gains (losses), net of tax	37		148
Other comprehensive (loss)/income, net of tax	(1,217)	66
Investment securities- with OTTI [Member] | Accretable Yield in Income [Member]
Recognized gains (losses), before tax	50	50
Recognized tax (expense) benefit	(13)	(13)
Recognized gains (losses), net of tax	37	37
Investment securities- all other [Member]
Unrealized holding (losses)/gains on investments	1,340	(10,844)
Recognized gains (losses), before tax		3
Net unrealized gains (losses), before tax	1,340	(2,519)
Unrealized tax (expense) benefit	(355)	2,901
Income tax benefit/(expense) related to other comprehensive income		674
Unrealized net gains (losses), net of tax	985	(7,943)
Other comprehensive (loss)/income, net of tax		(1,845)
Investment securities- all other [Member] | Recognition of Gains (Losses) In Income [Member]
Recognized gains (losses), before tax		3
Recognized tax (expense) benefit		(1)
Recognized gains (losses), net of tax		2
Investment Securities HTM [Member]
Unrealized holding (losses)/gains on investments		(8,328)
Recognized gains (losses), before tax	(181)	(94)
Net unrealized gains (losses), before tax	181	(8,234)
Unrealized tax (expense) benefit		2,228
Income tax benefit/(expense) related to other comprehensive income	(48)	2,203
Unrealized net gains (losses), net of tax		(6,100)	(6,120)
Recognized gains (losses), net of tax	(133)		(551)
Other comprehensive (loss)/income, net of tax	133	(6,031)
Investment Securities HTM [Member] | Amortization of Recognized Income [Member]
Recognized gains (losses), before tax	(181)	(94)
Recognized tax (expense) benefit	48	25
Recognized gains (losses), net of tax	(133)	(69)
Investment Securities Transferred From AFS to HTM
Unrealized holding (losses)/gains on investments		8,328
Unrealized tax (expense) benefit		(2,228)
Unrealized net gains (losses), net of tax		6,100
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Unrealized holding (losses)/gains on investments	(188)
Net unrealized gains (losses), before tax		839
Unrealized tax (expense) benefit	50
Income tax benefit/(expense) related to other comprehensive income		(225)
Unrealized net gains (losses), net of tax	(138)		1,116
Other comprehensive (loss)/income, net of tax	(138)	614
Adjustment [Member]
Unrealized holding (losses)/gains on investments	168	(3,620)
Recognized gains (losses), before tax	(250)	(279)
Net unrealized gains (losses), before tax	418	(3,341)
Adjustment [Member] | Pension [Member]
Unrealized holding (losses)/gains on investments	168	(3,620)
Net unrealized gains (losses), before tax	418	(3,341)
Unrealized tax (expense) benefit	(45)	969
Income tax benefit/(expense) related to other comprehensive income	(111)	894
Unrealized net gains (losses), net of tax	123	(2,651)	684
Recognized gains (losses), net of tax	(184)		(821)
Other comprehensive (loss)/income, net of tax	307	(2,447)
Adjustment [Member] | SERP [Member]
Unrealized holding (losses)/gains on investments
Net unrealized gains (losses), before tax	(2)	68
Unrealized tax (expense) benefit
Income tax benefit/(expense) related to other comprehensive income	1	(18)
Unrealized net gains (losses), net of tax			2,430
Recognized gains (losses), net of tax	1		$ (199)
Other comprehensive (loss)/income, net of tax	(1)	50
Adjustment [Member] | Amortization of Unrecognized Loss [Member] | Pension [Member]
Recognized gains (losses), before tax	(250)	(279)
Recognized tax (expense) benefit	66	75
Recognized gains (losses), net of tax	(184)	(204)
Adjustment [Member] | Amortization of Unrecognized Loss [Member] | SERP [Member]
Recognized gains (losses), before tax	2	(68)
Recognized tax (expense) benefit	(1)	18
Recognized gains (losses), net of tax	$ 1	$ (50)