Investments (Tables)

12 Months Ended

Dec. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation

The following table details fixed maturity and equity securities available for sale, by major investment category, at December 31, 2017 and 2016:

	Cost or Adjusted/Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
December 31, 2017
U.S. government and agency securities	$	237,809	$	275	$	2,193	$	235,891
Foreign governments	2,022		14		—		2,036
States, municipalities and political subdivisions	200,706		1,929		1,123		201,512
Public utilities	20,215		127		85		20,257
Corporate securities	287,025		1,746		1,209		287,562
Asset-backed securities	14,902		23		20		14,905
Redeemable preferred stocks	755		11		74		692
Total fixed maturities	$	763,434	$	4,125	$	4,704	$	762,855
Mutual funds	29,079		2,845		—		31,924
Public utilities	1,343		359		—		1,702
Other common stocks	18,856		9,093		47		27,902
Nonredeemable preferred stocks	1,718		53		4		1,767
Total equity securities	$	50,996	$	12,350	$	51	$	63,295
December 31, 2016
U.S. government and agency securities	$	151,656	$	189	$	1,893	$	149,952
Foreign government	2,031		30		—		2,061
States, municipalities and political subdivisions	170,636		1,027		2,551		169,112
Public utilities	7,687		116		73		7,730
Corporate securities	164,424		1,238		1,126		164,536
Redeemable preferred stocks	1,182		5		62		1,125
Total fixed maturities	$	497,616	$	2,605	$	5,705	$	494,516
Public utilities	1,343		164		—		1,507
Other common stocks	19,815		4,552		319		24,048
Nonredeemable preferred stocks	2,916		10		83		2,843
Total equity securities	$	24,074	$	4,726	$	402	$	28,398

Schedule of Realized Gain (Loss)

The following tables detail our realized gains (losses) by major investment category for the years ended December 31, 2017, 2016 and 2015:

	2017					2016					2015
	Gains (Losses)			Fair Value at Sale		Gains (Losses)			Fair Value at Sale		Gains (Losses)			Fair Value at Sale
Fixed maturities	$	268		$	35,248	$	1,811		$	56,484	$	727		$	87,141
Equity securities	847			2,209		64			13,253		1,895			7,790
Total realized gains	1,115			37,457		1,875			69,737		2,622			94,931
Fixed maturities	(890		)	53,194		(1,136		)	24,464		(595		)	38,485
Equity securities	(158		)	1,749		(192		)	37,790		(1,200		)	4,172
Total realized losses	(1,048		)	54,943		(1,328		)	62,254		(1,795		)	42,657
Net realized investment gains (losses)	$	67		$	92,400	$	547		$	131,991	$	827		$	137,588

Investments Classified by Contractual Maturity Date

The table below summarizes our fixed maturities at year end by contractual maturity periods. Actual results may differ as issuers may have the right to call or prepay obligations, with or without penalties, prior to the contractual maturity of those obligations.

	December 31, 2017
	Cost or Amortized Cost		Percent of Total		Fair Value		Percent of Total
Due in one year or less	$	66,969	8.8	%	$	66,739	8.7	%
Due after one year through five years	392,256		51.3	%	390,907		51.3	%
Due after five years through ten years	260,758		34.2	%	261,919		34.3	%
Due after ten years	28,549		3.7	%	28,385		3.7	%
Asset and mortgage-backed securities	14,902		2.0	%	14,905		2.0	%
Total	$	763,434	100.0	%	$	762,855	100.0	%

Investment Income

The following table summarizes our net investment income by major investment category:

	Year Ended December 31,
	2017			2016			2015
Fixed maturities	$	14,942		$	9,170		$	8,092
Equity securities	1,277			996			859
Cash and cash equivalents	626			141			25
Other investments	937			352			222
Other assets	30			20			14
Investment income	$	17,812		$	10,679		$	9,212
Investment expenses	(686		)	(587		)	(267		)
Net investment income	$	17,126		$	10,092		$	8,945

Schedule of Unrealized Loss on Investments

The following table presents an aging of our unrealized investment losses by investment class:

	Less Than Twelve Months					Twelve Months or More
	Number of Securities*	Gross Unrealized Losses		Fair Value		Number of Securities*	Gross Unrealized Losses		Fair Value
December 31, 2017
U.S. government and agency securities	129	$	641	$	103,328	123	$	1,552	$	74,190
States, municipalities and political subdivisions	106	734		91,245		31	389		19,718
Public utilities	16	44		7,052		5	41		1,016
Corporate securities	263	871		134,755		52	338		16,476
Asset backed securities	18	20		11,682		—	—		—
Redeemable preferred stocks	—	—		—		3	74		303
Total fixed maturities	532	2,310		348,062		214	2,394		111,703
Mutual Funds	1	—		131		—	—		—
Other common stocks	5	47		748		—	—		—
Nonredeemable preferred stocks	4	4		87		—	—		—
Total equity securities	10	51		966		—	—		—
Total	542	$	2,361	$	349,028	214	$	2,394	$	111,703
December 31, 2016
U.S. government and agency securities	186	$	1,893	$	111,216	—	$	—	$	—
States, municipalities and political subdivisions	201	2,551		136,360		—	—		—
Public utilities	8	73		2,222		—	—		—
Corporate securities	215	1,100		88,605		1	26		1,021
Redeemable preferred stocks	7	62		764		—	—		—
Total fixed maturities	617	5,679		339,167		1	26		1,021
Other common stocks	16	140		2,450		17	179		1,732
Nonredeemable preferred stocks	12	52		1,830		7	31		369
Total equity securities	28	192		4,280		24	210		2,101
Other investments	1	$	27	$	987	—	$	—	$	—
Total	646	$	5,898	$	344,434	25	$	236	$	3,122

Fair Value, Measurement Inputs, Disclosure

The following table presents the fair value of our financial instruments measured on a recurring basis by level at December 31, 2017 and December 31, 2016:

December 31, 2017	Total		Level 1		Level 2		Level 3
U.S. government and agency securities	$	235,891	$	—	$	235,891	$	—
Foreign governments	2,036		—		2,036		—
States, municipalities and political subdivisions	201,512		—		201,512		—
Public utilities	20,257		—		20,257		—
Corporate securities	287,562		—		287,562		—
Asset backed securities	14,905		—		14,905		—
Redeemable preferred stocks	692		692		—		—
Total fixed maturities	762,855		692		762,163		—
Mutual Funds	31,924		31,924		—		—
Public utilities	1,702		1,702		—		—
Other common stocks	27,902		27,902		—		—
Nonredeemable preferred stocks	1,767		1,767		—		—
Total equity securities	63,295		63,295		—		—
Other investments	8,381		300		7,447		634
Total recurring investments	$	834,531	$	64,287	$	769,610	$	634
December 31, 2016
U.S. government and agency securities	$	149,952	$	—	$	149,952	$	—
Foreign governments	2,061		—		2,061		—
States, municipalities and political subdivisions	169,112		—		169,112		—
Public utilities	7,730		—		7,730		—
Corporate securities	164,536		—		164,536		—
Redeemable preferred stocks	1,125		1,125		—		—
Total fixed maturities	494,516		1,125		493,391		—
Public utilities	1,507		1,507		—		—
Other common stocks	24,048		24,048		—		—
Nonredeemable preferred stocks	2,843		2,843		—		—
Total equity securities	28,398		28,398		—		—
Other investments	5,733		300		3,735		1,698
Total recurring investments	$	528,647	$	29,823	$	497,126	$	1,698

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The table below presents the rollforward of our Level 3 investments held at fair value during the year ended December 31, 2017:

	Other Investments
December 31, 2016	$	1,698
Transfers in	—
Transfer out	(990		)
Partnership income	42
Return of capital	(200		)
Unrealized gains in accumulated other comprehensive income	84
December 31, 2017	$	634

Other Investments Not Readily Marketable [Table Text Block]

The information presented in the table below is as of December 31, 2017.

	Book Value		Unrealized Gain		Unrealized Loss		Fair Value
Limited partnership investments	$	7,757	$	324	$	—	$	8,081
Certificates of deposit	300		—		—		300
Total other investments	$	8,057	$	324	$	—	$	8,381

Fair Value Inputs, Assets, Quantitative Information [Table Text Block]

	Fair Value			Valuation		Rate
	Impact			Technique	Unobservable Input	Adjustment
December 31, 2017
DCR VI	$	(37	)	Discounted cash flow	Discount rate based on D&B paydex scale	2.35%
December 31, 2016
DCR VI	$	(56	)	Discounted cash flow	Discount rate based on D&B paydex scale	2.35%
RCH	$	(341	)	Discounted cash flow	Discount rate based on D&B paydex scale	7.35%