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AFS Securities (Amortized cost and fair value of AFS securities, with gross unrealized gains and losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 586,297	$ 485,710
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	682	7,832
Gross Unrealized Losses	29,389	2,941
AFS securities	557,590	490,601
States and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	122,838	116,836
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	671	4,457
Gross Unrealized Losses	3,860	88
AFS securities	119,649	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	703	0
AFS securities	2,497	3,242
Mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	47,483	54,710
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2	1,438
Gross Unrealized Losses	1,689	0
AFS securities	45,796	56,148
Collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	172,802	90,435
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	9	1,876
Gross Unrealized Losses	5,239	10
AFS securities	167,572	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	548	167
AFS securities	7,602	8,002
US Treasury Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	231,824	212,379
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Gross Unrealized Losses	17,350	2,676
AFS securities	$ 214,474	$ 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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-SubTopic 10
-Section 50
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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
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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).

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