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Investments (Tables)

6 Months Ended

Jun. 30, 2020

Gross Unrecognized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses, Carrying Amount and Fair Value of Investments Classified as Held-to-Maturity

The gross unrecognized gains and losses on, amortized cost, allowance for credit losses, carrying amount, and fair value of, those investments classified as held-to-maturity at June 30, 2020 are summarized as follows:

	Amortized Cost		Allowance for Credit Losses			Carrying Amount		Gross Unrecognized Gains		Gross Unrecognized Losses			Fair Value
	(in thousands)
States and political subdivisions	$	469,538	$	(49	)	$	469,489	$	28,907	$	(20	)	$	498,376
Corporate bonds		83,879		(299	)		83,580		3,054		—			86,634
U.S. agency-based mortgage-backed securities		9,227		—			9,227		720		—			9,947
U.S. Treasury securities and obligations of U.S. government agencies		13,710		—			13,710		422		—			14,132
Asset-backed securities		194		(9	)		185		7		—			192
Totals	$	576,548	$	(357	)	$	576,191	$	33,110	$	(20	)	$	609,281

The gross unrealized gains and losses on, and the amortized cost and fair value of, those investments classified as held-to-maturity at December 31, 2019 are summarized as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
States and political subdivisions	$	466,270	$	19,570	$	(193	)	$	485,647
Corporate bonds		109,241		1,684		—			110,925
U.S. agency-based mortgage-backed securities		10,967		544		—			11,511
U.S. Treasury securities and obligations of U.S. government agencies		12,723		330		(12	)		13,041
Asset-backed securities		220		—		(1	)		219
Totals	$	599,421	$	22,128	$	(206	)	$	621,343

Gross Unrealized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses and Fair Value of Investments Classified as Available-for-sale

The gross unrealized gains and losses on, and the amortized cost, allowance for credit losses, and fair value of, those investments classified as available-for-sale at June 30, 2020 are summarized as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Allowance for Credit Losses
	(in thousands)
States and political subdivisions	$	227,932	$	16,750	$	—		$	244,682	$	—
Corporate bonds		103,713		5,711		(47	)		109,377		—
U.S. agency-based mortgage-backed securities		28,581		575		—			29,156		—
U.S. Treasury securities and obligations of U.S. government agencies		31,891		1,134		—			33,025		—
Totals	$	392,117	$	24,170	$	(47	)	$	416,240	$	—

The gross unrealized gains and losses on, and the amortized cost and fair value of, those investments classified as available-for-sale at December 31, 2019 are summarized as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
States and political subdivisions	$	225,895	$	11,906	$	(26	)	$	237,775
Corporate bonds		130,453		3,326		(1	)		133,778
U.S. agency-based mortgage-backed securities		29,499		64		(96	)		29,467
U.S. Treasury securities and obligations of U.S. government agencies		39,851		317		(42	)		40,126
Totals	$	425,698	$	15,613	$	(165	)	$	441,146

Gross Unrealized Gains and Losses and Cost of Equity

The gross unrealized gains and losses on, and the cost of equity securities at June 30, 2020 are summarized as follows:

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
Equity securities:
Domestic common stock	$	33,227	$	1,425	$	(1,172	)	$	33,480
Total equity securities	$	33,227	$	1,425	$	(1,172	)	$	33,480

The gross unrealized gains and losses on, and the cost of equity securities at December 31, 2019 are summarized as follows:

	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(in thousands)
Equity securities:
Domestic common stock	$	24,457	$	3,446	$	—	$	27,903
Total equity securities	$	24,457	$	3,446	$	—	$	27,903

Summary of Carrying Amount and Fair Value of Investments in Fixed Maturity Securities, by Contractual Maturity

A summary of the carrying amounts and fair value of investments in fixed maturity securities, classified as held-to-maturity, by contractual maturity, is as follows:

	June 30, 2020				December 31, 2019
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(in thousands)
Maturity:
Within one year	$	59,898	$	60,504	$	49,967	$	50,348
After one year through five years		195,398		204,082		198,025		202,109
After five years through ten years		80,484		84,789		110,460		113,877
After ten years		230,999		249,767		229,782		243,279
U.S. agency-based mortgage-backed securities		9,227		9,947		10,967		11,511
Asset-backed securities		185		192		220		219
Totals	$	576,191	$	609,281	$	599,421	$	621,343

Investment Securities Continuous Unrealized Loss Position

The following table summarizes the fair value and gross unrealized losses on securities classified as available-for-sale, aggregated by major investment category and length of time that the individual securities have been in a continuous unrealized loss position as of June 30, 2020:

	Less Than 12 Months				12 Months or Greater				Total
	Fair Value of Investments with Unrealized Losses		Gross Unrealized Losses		Fair Value of Investments with Unrealized Losses		Gross Unrealized Losses		Fair Value of Investments with Unrealized Losses		Gross Unrealized Losses
	(in thousands)
June 30, 2020
Available-for-Sale
Fixed maturity securities:
Corporate bonds		3,506		47		—		—		3,506		47
Total available-for-sale securities	$	3,506	$	47	$	—	$	—	$	3,506	$	47

The following table summarizes the fair value and gross unrealized losses on securities, aggregated by major investment category and length of time that the individual securities have been in a continuous unrealized loss position as of December 31, 2019:

	Less Than 12 Months				12 Months or Greater				Total
	Fair Value of Investments with Unrealized Losses		Gross Unrealized Losses		Fair Value of Investments with Unrealized Losses		Gross Unrealized Losses		Fair Value of Investments with Unrealized Losses		Gross Unrealized Losses
	(in thousands)
December 31, 2019
Held-to-Maturity
Fixed maturity securities:
States and political subdivisions	$	21,074	$	193	$	—	$	—	$	21,074	$	193
U.S. Treasury securities and obligations of U.S. government agencies		—		—		3,243		12		3,243		12
Asset-backed securities		—		—		68		1		68		1
Total held-to-maturity securities		21,074		193		3,311		13		24,385		206
Available-for-Sale
Fixed maturity securities:
States and political subdivisions	$	4,140	$	26	$	—	$	—	$	4,140	$	26
Corporate bonds		6,426		1		—		—		6,426		1
U.S. agency-based mortgage-backed securities		13,007		95		1,152		1		14,159		96
U.S. Treasury securities and obligations of U.S. government agencies		—		—		17,068		42		17,068		42
Total available-for-sale securities		23,573		122		18,220		43		41,793		165
Total	$	44,647	$	315	$	21,531	$	56	$	66,178	$	371

Changes in Allowance for Credit Losses by Major Security Type of Investments Classified as Held-to-Maturity

The following table illustrates the changes in the allowance for credit losses by major security type of the investments classified as held-to-maturity for the quarter ended June 30, 2020.

	States and Political Subdivisions			Corporate Bonds		U.S. Agency-Based Mortgage-Backed Securities		U.S. Treasury Securities and Obligations of U.S. Government Agencies		Asset-Backed Securities			Totals
	(in thousands)
Balance at March 31, 2020	$	50		$	215	$	—	$	—	$	10		$	275
Provision for credit loss expense (benefit)		(1	)		84		—		—		(1	)		82
Allowance for securities purchased with credit deterioration		—			—		—		—		—			—
Securities charged off		—			—		—		—		—			—
Recoveries		—			—		—		—		—			—
Balance at June 30, 2020	$	49		$	299	$	—	$	—	$	9		$	357

The following table illustrates the changes in the allowance for credit losses by major security type of the investments classified as held-to-maturity for the six months ended June 30, 2020.

	States and Political Subdivisions		Corporate Bonds		U.S. Agency-Based Mortgage-Backed Securities		U.S. Treasury Securities and Obligations of U.S. Government Agencies		Asset-Backed Securities			Totals
	(in thousands)
Balance at January 1, 2020	$	45	$	245	$	—	$	—	$	11		$	301
Provision for credit loss expense (benefit)		4		54		—		—		(2	)		56
Allowance for securities purchased with credit deterioration		—		—		—		—		—			—
Securities charged off		—		—		—		—		—			—
Recoveries		—		—		—		—		—			—
Balance at June 30, 2020	$	49	$	299	$	—	$	—	$	9		$	357

Schedule of Amortized Cost Held-to-Maturity Securities Aggregated By Credit Quality Indicator

The table below presents the amortized cost of held-to-maturity securities aggregated by credit quality indicator as of June 30, 2020.

	States and Political Subdivisions		Corporate Bonds		U.S. Agency-Based Mortgage-Backed Securities		U.S. Treasury Securities and Obligations of U.S. Government Agencies		Asset-Backed Securities		Totals
	Amortized cost
	(in thousands)
AAA/AA/A ratings	$	467,104	$	31,595	$	9,227	$	13,710	$	135	$	521,771
Baa/BBB ratings		2,434		52,284		—		—		18		54,736
B ratings		—		—		—		—		41		41
Total	$	469,538	$	83,879	$	9,227	$	13,710	$	194	$	576,548

Available-for-Sale Securities [Member]

Summary of Carrying Amount and Fair Value of Investments in Fixed Maturity Securities, by Contractual Maturity

A summary of the amortized cost and fair value of investments in fixed maturity securities, classified as available-for-sale, by contractual maturity, is as follows:

	June 30, 2020				December 31, 2019
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(in thousands)
Maturity:
Within one year	$	65,386	$	66,197	$	27,160	$	27,194
After one year through five years		89,127		93,818		144,142		146,469
After five years through ten years		45,235		49,460		47,175		49,419
After ten years		163,788		177,609		177,722		188,597
U.S. agency-based mortgage-backed securities		28,581		29,156		29,499		29,467
Totals	$	392,117	$	416,240	$	425,698	$	441,146