Fair Values of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Summary of Carrying or Reported Values and Corresponding Fair Values for Financial Instruments

The following table summarizes the carrying or reported values and corresponding fair values for financial instruments:

	December 31,
	2020				2019
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(in thousands)
Assets:
Fixed maturity securities—held to maturity	$	585,130	$	621,654	$	599,421	$	621,343
Fixed maturity securities—available-for-sale		414,279		414,279		441,146		441,146
Equity securities		43,437		43,437		27,903		27,903
Short-term investments		45,898		45,898		56,548		56,548
Cash and cash equivalents		61,757		61,757		43,813		43,813

Schedule of Assets Measured at Fair Value on Recurring Basis

Assets measured at fair value on a recurring basis as of December 31, 2020 and 2019 are as follows:

	December 31, 2020
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
	(in thousands)
Financial instruments carried at fair value,    classified as part of:
Securities available-for-sale—fixed maturity:
States and political subdivisions	$	—	$	276,542	$	—	$	276,542
Corporate bonds		—		88,899		—		88,899
U.S. agency-based mortgage-backed securities		—		19,052		—		19,052
U.S. Treasury securities		29,786		—		—		29,786
Total securities available-for-sale—fixed maturity		29,786		384,493		—		414,279
Equity securities:
Domestic common stock		43,437		—		—		43,437
Total	$	73,223	$	384,493	$	—	$	457,716

	December 31, 2019
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
	(in thousands)
Financial instruments carried at fair value,    classified as part of:
Securities available-for-sale—fixed maturity:
States and political subdivisions	$	—	$	237,775	$	—	$	237,775
Corporate bonds		—		133,778		—		133,778
U.S. agency-based mortgage-backed securities		—		29,467		—		29,467
U.S. Treasury securities		40,126		—		—		40,126
Total securities available-for-sale—fixed maturity		40,126		401,020		—		441,146
Equity securities:
Domestic common stock		27,903		—		—		27,903
Total	$	68,029	$	401,020	$	—	$	469,049

Schedule of Assets Measured at Amortized Cost

Assets measured at amortized cost as of December 31, 2020 and 2019 are as follows:

	December 31, 2020
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
	(in thousands)
Securities held-to-maturity—fixed maturity:
States and political subdivisions	$	—	$	526,821	$	—	$	526,821
Corporate bonds		—		72,900		—		72,900
U.S. agency-based mortgage-backed securities		—		7,906		—		7,906
U.S. Treasury securities		13,865		—		—		13,865
Asset-backed securities		—		162		—		162
Total held-to-maturity	$	13,865	$	607,789	$	—	$	621,654

	December 31, 2019
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
	(in thousands)
Securities held-to-maturity—fixed maturity:
States and political subdivisions	$	—	$	485,647	$	—	$	485,647
Corporate bonds		—		110,925		—		110,925
U.S. agency-based mortgage-backed securities		—		11,511		—		11,511
U.S. Treasury securities		7,873		—		—		7,873
Obligations of U.S. government agencies		—		5,168		—		5,168
Asset-backed securities		—		219		—		219
Total held-to-maturity	$	7,873	$	613,470	$	—	$	621,343