Investments (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2019

Dec. 31, 2018

Investments

Schedule of available-for-sale investments

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
September 30, 2019	Cost or Cost		Gains		Losses		Value
	(in thousands)
Fixed maturities:
U.S. Governments	$	13,085	$	461	$	(7)	$	13,539
States, territories, and possessions		2,300		169		—		2,469
Political subdivisions		1,922		33		—		1,955
Special revenue excluding mortgage/asset-backed securities		17,762		614		(3)		18,373
Industrial and miscellaneous		123,835		5,051		(31)		128,855
Mortgage/asset-backed securities		57,719		1,090		(14)		58,795
Total available-for-sale investments	$	216,623	$	7,418	$	(55)	$	223,986

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
December 31, 2018	Cost or Cost		Gains		Losses		Value
	(in thousands)
Fixed maturities:
U.S. Governments	$	15,299	$	96	$	(126)	$	15,269
States, territories, and possessions		1,227		—		(6)		1,221
Political subdivisions		825		—		(10)		815
Special revenue excluding mortgage/asset-backed securities		12,429		115		(91)		12,453
Industrial and miscellaneous		65,885		192		(951)		65,126
Mortgage/asset-backed securities		27,284		133		(81)		27,336
Total available-for-sale investments	$	122,949	$	536	$	(1,265)	$	122,220

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
December 31, 2018	Cost or Cost		Gains		Losses		Value
			(in thousands)
Fixed maturities:
U.S. Governments	$	15,299	$	96	$	(126)	$	15,269
States, territories, and possessions		1,227		—		(6)		1,221
Political subdivisions		825		—		(10)		815
Special revenue excluding mortgage/asset‑backed securities		12,429		115		(91)		12,453
Industrial and miscellaneous		65,885		192		(951)		65,126
Mortgage/asset‑backed securities		27,284		133		(81)		27,336
Total available‑for‑sale investments	$	122,949	$	536	$	(1,265)	$	122,220

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
December 31, 2017	Cost or Cost		Gains		Losses		Value
			(in thousands)
Fixed maturities:
U.S. Governments	$	13,393	$	—	$	(108)	$	13,285
States, territories, and possessions		3,188		10		(1)		3,197
Political subdivisions		4,118		—		(51)		4,067
Special revenue excluding mortgage/asset‑backed securities		24,039		42		(167)		23,914
Industrial and miscellaneous		44,582		150		(201)		44,531
Mortgage/asset‑backed securities		12,981		2		(64)		12,919
Total fixed maturities		102,301		204		(592)		101,913
Equity securities		19,569		4,126		(109)		23,586
Total available‑for‑sale investments	$	121,870	$	4,330	$	(701)	$	125,499

Schedule of aggregate fair value and gross unrealized losses

	Less Than 12 Months				More Than 12 Months				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
September 30, 2019	Value		Losses		Value		Losses		Value		Losses
	(in thousands)
Fixed maturity securities:
U.S. Governments		1,485		—	$	1,824	$	(7)	$	3,309	$	(7)
States, territories, and possessions		—		—		—		—		—		—
Political subdivisions		546		—		—		—		546		—
Special revenue excluding mortgage/asset-backed securities		569		(1)		997		(2)		1,566		(3)
Industrial and miscellaneous		3,936		(22)		3,457		(9)		7,393		(31)
Mortgage/asset-backed securities		5,261		(13)		263		(1)		5,524		(14)
Total	$	11,797	$	(36)	$	6,541	$	(19)	$	18,338	$	(55)

	Less Than 12 Months				More Than 12 Months				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
December 31, 2018	Value		Losses		Value		Losses		Value		Losses
	(in thousands)
Fixed maturity securities:
U.S. Governments	$	1,970	$	(25)	$	6,197	$	(101)	$	8,167	$	(126)
States, territories, and possessions		719		(5)		501		(1)		1,220		(6)
Political subdivisions		264		(1)		550		(9)		814		(10)
Special revenue excluding mortgage/asset-backed securities		1,706		(14)		5,916		(77)		7,622		(91)
Industrial and miscellaneous		30,544		(556)		14,913		(395)		45,457		(951)
Mortgage/asset-backed securities		6,653		(39)		3,830		(42)		10,483		(81)
Total	$	41,856	$	(640)	$	31,907	$	(625)	$	73,763	$	(1,265)

	Less Than 12 Months				More Than 12 Months				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
At December 31, 2018	Value		Losses		Value		Losses		Value		Losses
	(in thousands)
Fixed maturity securities:
U.S. Governments	$	1,970	$	(25)	$	6,197	$	(101)	$	8,167	$	(126)
States, territories, and possessions		719		(5)		501		(1)		1,220		(6)
Political subdivisions		264		(1)		550		(9)		814		(10)
Special revenue excluding mortgage/asset‑backed securities		1,706		(14)		5,916		(77)		7,622		(91)
Industrial and miscellaneous		30,544		(556)		14,913		(395)		45,457		(951)
Mortgage/asset‑backed securities		6,653		(39)		3,830		(42)		10,483		(81)
	$	41,856	$	(640)	$	31,907	$	(625)	$	73,763	$	(1,265)

	Less Than 12 Months				More Than 12 Months				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
At December 31, 2017	Value		Losses		Value		Losses		Value		Losses
	(in thousands)
Fixed maturity securities:
U.S. Governments	$	11,426	$	(89)	$	1,858	$	(19)	$	13,284	$	(108)
States, territories, and possessions		1,568		(1)		—		—		1,568		(1)
Political subdivisions		2,996		(24)		1,071		(27)		4,067		(51)
Special revenue excluding mortgage/asset‑backed securities		17,109		(129)		2,140		(38)		19,249		(167)
Industrial and miscellaneous		23,914		(137)		4,463		(64)		28,377		(201)
Mortgage/asset‑backed securities		7,588		(31)		3,298		(33)		10,886		(64)
Total fixed maturity		64,601		(411)		12,830		(181)		77,431		(592)
Equity securities		1,995		(57)		807		(52)		2,802		(109)
	$	66,596	$	(468)	$	13,637	$	(233)	$	80,233	$	(701)

Schedule of contractual maturities of available-for-sale securities

	Amortized		Fair
	Cost		Value
	(in thousands)
Due within one year	$	7,098	$	7,099
Due after one year through five years		68,726		69,853
Due after five years through ten years		55,711		59,609
Due after ten years		27,369		28,630
Mortgage and asset-backed securities		57,719		58,795
	$	216,623	$	223,986

	2018
	Amortized		Fair
	Cost		Value
	(in thousands)
Due within one year	$	2,621	$	2,614
Due after one year through five years		50,677		49,802
Due after five years through ten years		32,471		32,518
Due after ten years		9,896		9,950
Mortgage and asset‑backed securities		27,284		27,336
	$	122,949	$	122,220

Schedule of net investment income

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
	(in thousands)				(in thousands)
Interest income	$	1,678	$	816	$	4,140	$	2,083
Dividend income		132		118		299		365
Investment expense		(81)		(69)		(267)		(237)
Net investment income	$	1,729	$	865	$	4,172	$	2,211

	Years Ended
	December 31,
	2018		2017		2016
	(in thousands)
Interest income	$	3,036	$	1,916	$	1,425
Dividend income		514		514		472
Less: investment expense		(312)		(305)		(282)
Net investment income	$	3,238	$	2,125	$	1,615

Schedule of net realized and unrealized investment gains and losses

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
		(in thousands)				(in thousands)
Realized gains:
Gains on sales of fixed maturity securities	$	38	$	11	$	135	$	20
Gains on sales of equity securities		—		18		64		421
Total realized gains		38		29		199		441
Realized losses:
Losses on sales of fixed maturity securities		(1)		(102)		(70)		(257)
Losses on sales of equity securities		(21)		(229)		(174)		(4,287)
Total realized losses		(22)		(331)		(244)		(4,544)
Net realized investment gains (losses)		16		(302)		(45)		(4,103)
Net unrealized gains on equity securities		345		1,638		3,310		5,072
Net realized and unrealized gains on investments	$	361	$	1,336	$	3,265	$	969

	Years Ended
	December 31,
	2018		2017		2016
	(in thousands)
Realized gains:
Gains on sales of fixed maturity securities	$	19	$	3	$	56
Gains on sales of equity securities		4,287		802		592
Total realized gains		4,306		805		648
Realized losses:
Losses on sales of fixed maturity securities		(418)		(48)		—
Losses on sales of equity securities		(421)		(149)		(149)
Total realized losses		(839)		(197)		(149)
Net realized investment gains		3,467		608		499
Net unrealized losses on equity securities		(6,036)		—		—
Net realized and unrealized (losses) gains on investments	$	(2,569)	$	608	$	499