Schedule II - Statement of Cash Flows - Supplemental Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income (loss)	$ 1,538	$ (7,915)	$ (1,027)	$ (3,584)	$ 4,951	$ 2,046	$ (4,565)	$ (3,802)	$ (10,988)	$ (1,370)	$ (11,062)
Realized investment gains (losses), net									(1,502)	(5,249)	(108)
Federal income tax receivable									(706)	3,341	(52,079)
Deferred federal income tax expense (benefit)									(402)	1,573	62,633
Amortization of premiums and discounts on investments									8,061	12,859	16,998
Depreciation									1,423	1,677	1,451
Accrued investment income									1,316	1,014	595
Stock-based compensation									2,223	2,099	410
Other, net									(3,043)	(1,707)	(752)
Net cash provided by operating activities									48,834	72,223	84,620
Purchase of fixed maturities, available-for-sale									(271,474)	(329,627)	(195,001)
Maturities of fixed maturities, available-for-sale									220,397	181,618	65,906
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale									20,537	66,900	38,823
Sale of other long-term investments and property and equipment									3,671	6,983	14
Purchase of other long-term investments and property and equipment									(30,256)	(187)	0
Payments to Acquire Property, Plant, and Equipment									(221)	(511)	(724)
Purchase of short-term investments									0	(2,456)	(7,850)
Maturity of short-term investments									1,300	9,090	0
Net cash used in investing activities									(61,812)	(69,345)	(85,134)
Net cash provided by financing activities									904	(2,165)	(58)
Net increase (decrease) in cash and cash equivalents									(12,074)	713	(572)
Cash and cash equivalents at beginning of year				46,205				45,492	46,205	45,492	46,064
Cash and cash equivalents at end of year	34,131				46,205				34,131	46,205	45,492
Equity Securities [Member]
Purchases of equity securities									4,473	0	9
Parent Company [Member]
Net income (loss)									(10,988)	(1,370)	(11,062)
Realized investment gains (losses), net									62	3,013	196
Equity in income of consolidated subsidiaries									10,657	2,063	10,691
Accrued expenses and other liabilities									11,629	(6,530)	(2,036)
Federal income tax receivable									(17,647)	0	0
Deferred federal income tax expense (benefit)									79	0	0
Amortization of premiums and discounts on investments									535	496	567
Depreciation									133	267	356
Accrued investment income									64	(5)	(46)
Stock-based compensation									2,223	2,099	0
Decrease (increase) in receivable from subsidiaries									(141)	1,101	382
Other, net									(3,896)	(248)	22
Net cash provided by operating activities									(7,290)	886	(930)
Purchase of fixed maturities, available-for-sale									(4,628)	(12,970)	(11,871)
Maturities of fixed maturities, available-for-sale									7,114	691	7,160
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale									5,735	4,268	1,366
Sale of other long-term investments and property and equipment									11	14	103
Purchase of other long-term investments and property and equipment									8,790	0	0
Payments to Acquire Property, Plant, and Equipment									(60)	(85)	(60)
Purchase of short-term investments									0	(2,456)	(7,850)
Maturity of short-term investments									1,300	9,090	0
Net cash used in investing activities									432	(1,448)	(11,152)
Purchase of the Company's stock from affiliates									(869)	(377)	0
Net cash provided by financing activities									(869)	(377)	0
Net increase (decrease) in cash and cash equivalents									(7,727)	(939)	(12,082)
Cash and cash equivalents at beginning of year				$ 10,829				$ 11,768	10,829	11,768	23,850
Cash and cash equivalents at end of year	$ 3,102				$ 10,829				3,102	10,829	11,768
Parent Company [Member] | Equity Securities [Member]
Purchases of equity securities									$ 250	$ 0	$ 0