Financial Schedules Schedule II - Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income (loss)	$ (1,432)	$ (7,109)	$ (2,558)	$ 37	$ (44,204)	$ 3,449	$ 572	$ 2,056	$ (11,062)	$ (38,127)	$ 1,969
Realized investment gains (losses), net									(108)	(518)	1,985
Amortization of premiums and discounts on investments									16,998	16,606	14,676
Depreciation									1,451	1,065	806
Accrued investment income									595	(1,159)	(2,497)
Other, net									(752)	59	224
Net cash provided by operating activities									84,620	93,012	102,271
Purchase of fixed maturities, available-for-sale									(195,001)	(167,699)	(234,964)
Maturities of fixed maturities, available-for-sale									65,906	74,902	56,032
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale									38,823	1,077	20,638
Sale of other long-term investments and property and equipment									14	3,041	37
Purchase of other long-term investments and property and equipment									0	0	(75)
Purchase of short-term investments									(7,850)	0	(522)
Maturity of short-term investments									0	500	256
Net cash used in investing activities									(85,134)	(85,005)	(152,077)
Net cash provided by financing activities									(58)	2,547	2,489
Net increase (decrease) in cash and cash equivalents									(572)	10,554	(47,317)
Cash and cash equivalents at beginning of year				46,064				35,510	46,064	35,510	82,827
Cash and cash equivalents at end of year	45,492				46,064				45,492	46,064	35,510
Parent Company [Member]
Net income (loss)									(11,062)	(38,127)	1,969
Realized investment gains (losses), net									196	0	0
Equity in income of consolidated subsidiaries									10,691	38,745	(1,288)
Accrued expenses and other liabilities									(2,036)	4,370	(3,018)
Amortization of premiums and discounts on investments									567	714	911
Depreciation									356	319	162
Accrued investment income									(46)	181	35
Decrease (increase) in receivable from subsidiaries									382	(2,901)	300
Other, net									22	(102)	149
Net cash provided by operating activities									(930)	3,199	(780)
Purchase of fixed maturities, available-for-sale									(11,871)	0	(6,615)
Maturities of fixed maturities, available-for-sale									7,160	10,986	8,015
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale									1,366	0	0
Sale of other long-term investments and property and equipment									103	3	371
Purchase of other long-term investments and property and equipment									(60)	(261)	(740)
Purchase of short-term investments									(7,850)	0	(522)
Maturity of short-term investments									0	500	0
Capital contribution to subsidiary									0	(5,250)	0
Net cash used in investing activities									(11,152)	5,978	509
Purchase of the Company's stock from affiliates									0	0	(812)
Net cash provided by financing activities									0	0	(812)
Net increase (decrease) in cash and cash equivalents									(12,082)	9,177	(1,083)
Cash and cash equivalents at beginning of year				$ 23,850				$ 14,673	23,850	14,673	15,756
Cash and cash equivalents at end of year	$ 11,768				$ 23,850				$ 11,768	$ 23,850	$ 14,673