AFS Securities (Tables)

12 Months Ended

Dec. 31, 2020

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 as of December 31:


	2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
States and political subdivisions	$	137,710	$	5,946	$	—	$	143,656
Auction rate money market preferred	3,200		37		—		3,237
Mortgage-backed securities	85,926		2,726		—		88,652
Collateralized mortgage obligations	97,430		4,553		—		101,983
Corporate	1,700		—		—		1,700
Total	$	325,966	$	13,262	$	—	$	339,228


	2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
States and political subdivisions	$	165,005	$	4,747	$	—	$	169,752
Auction rate money market preferred	3,200		—		81		3,119
Mortgage-backed securities	139,831		933		560		140,204
Collateralized mortgage obligations	115,944		1,007		187		116,764
Total	$	423,980	$	6,687	$	828	$	429,839

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 December 31, 2020 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
States and political subdivisions	$	23,754	$	63,781	$	24,055	$	26,120	$	—	$	137,710
Auction rate money market preferred	—		—		—		—		3,200		3,200
Mortgage-backed securities	—		—		—		—		85,926		85,926
Collateralized mortgage obligations	—		—		—		—		97,430		97,430
Corporate	—		—		1,700		—		—		1,700
Total amortized cost	$	23,754	$	63,781	$	25,755	$	26,120	$	186,556	$	325,966
Fair value	$	23,922	$	65,462	$	26,990	$	28,982	$	193,872	$	339,228

Summary of the activity related to sales of available-for-sale securities

A summary of the sales activity of AFS securities during the years ended December 31 is displayed in the following table.


	2020		2019		2018
Proceeds from sales of AFS securities	$	26,855	$	33,840	$	—
Realized gains (losses)	$	71	$	6	$	—
Applicable income tax expense (benefit)	$	15	$	1	$	—

Available-for-sale securities with gross unrealized losses

The following information pertains to AFS securities with gross unrealized losses at December 31 aggregated by investment category and length of time that individual securities have been in a continuous loss position. There were no AFS securities with gross unrealized losses in a continuous loss position at December 31, 2020.


	2019
	Less Than Twelve Months				Twelve Months or More
	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Total Unrealized Losses
Auction rate money market preferred	—		—		81		3,119		81
Mortgage-backed securities	3		3,974		557		49,701		560
Collateralized mortgage obligations	43		20,262		144		13,309		187
Total	$	46	$	24,236	$	782	$	66,129	$	828
Number of securities in an unrealized loss position:			9				19		28