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AFS Securities (Amortized cost and fair value of AFS securities, with gross unrealized gains and losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 632,755	$ 485,710
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	111	7,832
Gross Unrealized Losses	51,633	2,941
AFS securities	581,233	490,601
States and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	121,414	116,836
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	111	4,457
Gross Unrealized Losses	7,525	88
AFS securities	114,000	121,205
Auction rate money market preferred [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,200	3,200
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	42
Gross Unrealized Losses	721	0
AFS securities	2,479	3,242
Mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	45,087	54,710
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	1,438
Gross Unrealized Losses	4,045	0
AFS securities	41,042	56,148
Collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	223,181	90,435
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	1,876
Gross Unrealized Losses	13,461	10
AFS securities	209,720	92,301
Corporate Debt Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	8,150	8,150
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	19
Gross Unrealized Losses	949	167
AFS securities	7,201	8,002
US Treasury Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	231,723	212,379
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Gross Unrealized Losses	24,932	2,676
AFS securities	$ 206,791	$ 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

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-Publisher FASB
-Name Accounting Standards Codification
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-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).

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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
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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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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