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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, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 437,749	$ 325,966
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	10,754	13,262
Gross Unrealized Losses	49	0
AFS securities	448,454	339,228
States and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	126,002	137,710
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	4,971	5,946
Gross Unrealized Losses	13	0
AFS securities	130,960	143,656
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	60	37
Gross Unrealized Losses	0	0
AFS securities	3,260	3,237
Mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	66,091	85,926
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2,064	2,726
Gross Unrealized Losses	0	0
AFS securities	68,155	88,652
Collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	105,965	97,430
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	3,332	4,553
Gross Unrealized Losses	3	0
AFS securities	109,294	101,983
Corporate Debt Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,200	1,700
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	17	0
Gross Unrealized Losses	25	0
AFS securities	4,192	$ 1,700
US Treasury Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	132,291
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	310
Gross Unrealized Losses	$ 8

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
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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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
-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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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