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AFS Securities (Amortized cost and fair value of AFS securities, with gross unrealized gains and losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 625,605	$ 485,710
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	392	7,832
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	45,516	2,941
Debt Securities, Available-for-sale	580,481	490,601
States and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	122,023	116,836
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	392	4,457
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	4,903	88
Debt Securities, Available-for-sale	117,512	121,205
Auction rate money market preferred [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	3,200	3,200
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	42
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	858	0
Debt Securities, Available-for-sale	2,342	3,242
Mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	42,309	54,710
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	1,438
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3,239	0
Debt Securities, Available-for-sale	39,070	56,148
Collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	218,301	90,435
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	1,876
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	12,573	10
Debt Securities, Available-for-sale	205,728	92,301
Corporate Debt Securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	8,150	8,150
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	19
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1,022	167
Debt Securities, Available-for-sale	7,128	8,002
US Treasury Securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	231,622	212,379
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	22,921	2,676
Debt Securities, Available-for-sale	$ 208,701	$ 209,703

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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