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AFS Securities (Tables)

3 Months Ended

Mar. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Amortized cost and fair value of available-for-sale securities

The amortized cost and fair value of AFS securities, with gross unrealized gains and losses, are as follows at:

			March 31, 2022
			Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Fair Value
U.S. Treasury			$	231,925					$	—					$	13,657					$	218,268
States and political subdivisions			114,112						1,595						1,692						114,015
Auction rate money market preferred			3,200						—						333						2,867
Mortgage-backed securities			50,775						9						1,206						49,578
Collateralized mortgage obligations			154,794						138						2,491						152,441
Corporate			8,150						—						400						7,750
Total			$	562,956					$	1,742					$	19,779					$	544,919

			December 31, 2021
			Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Fair Value
U.S. Treasury			$	212,379					$	—					$	2,676					$	209,703
States and political subdivisions			116,836						4,457						88						121,205
Auction rate money market preferred			3,200						42						—						3,242
Mortgage-backed securities			54,710						1,438						—						56,148
Collateralized mortgage obligations			90,435						1,876						10						92,301
Corporate			8,150						19						167						8,002
Total			$	485,710					$	7,832					$	2,941					$	490,601

Amortized cost and fair value of available-for-sale securities by contractual maturity

The amortized cost and fair value of AFS securities by contractual maturity at March 31, 2022 are as follows:

			Maturing																								Securities with Variable Monthly Payments or Noncontractual Maturities
			Due in One Year or Less						After One Year But Within Five Years						After Five Years But Within Ten Years						After Ten Years												Total
U.S. Treasury			$	—					$	231,925					$	—					$	—					$	—					$	231,925
States and political subdivisions			15,866						52,934						18,472						26,840						—						114,112
Auction rate money market preferred			—						—						—						—						3,200						3,200
Mortgage-backed securities			—						—						—						—						50,775						50,775
Collateralized mortgage obligations			—						—						—						—						154,794						154,794
Corporate			—						—						8,150						—						—						8,150
Total amortized cost			$	15,866					$	284,859					$	26,622					$	26,840					$	208,769					$	562,956
Fair value			$	15,917					$	271,929					$	26,157					$	26,030					$	204,886					$	544,919

Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value

The following information pertains to AFS securities with gross unrealized losses at March 31, 2022 and December 31, 2021, aggregated by investment category and length of time that individual securities have been in a continuous loss position.

			March 31, 2022
			Less Than Twelve Months												Twelve Months or More
			Gross Unrealized Losses						Fair Value						Gross Unrealized Losses						Fair Value						Total Unrealized Losses
U.S. Treasury			$	13,657					$	218,268					$	—					$	—					$	13,657
States and political subdivisions			1,660						21,890						32						3,137						1,692
Auction rate money market preferred			—						—						333						2,867						333
Mortgage-backed securities			1,206						48,345						—						—						1,206
Collateralized mortgage obligations			2,491						104,218						—						—						2,491
Corporate			371						6,079						29						1,672						400
Total			$	19,385					$	398,800					$	394					$	7,676					$	19,779
Number of securities in an unrealized loss position:									102												36						138

			December 31, 2021
			Less Than Twelve Months												Twelve Months or More
			Gross Unrealized Losses						Fair Value						Gross Unrealized Losses						Fair Value						Total Unrealized Losses
U.S. Treasury			$	2,676					$	209,703					$	—					$	—					$	2,676
States and political subdivisions			88						9,674						—						—						88
Collateralized mortgage obligations			10						11,165						—						—						10
Corporate			167						6,283						—						—						167
Total			$	2,941					$	236,825					$	—					$	—					$	2,941
Number of securities in an unrealized loss position:									40												—						40

X

- Definition

Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27290-111563

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455

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- Definition

Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

+ References

No definition available.

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- Definition

Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.

+ References

No definition available.

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