Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income (loss)	$ 8,332	$ 41,344	$ 26,500
Other comprehensive income (loss), before income taxes:
Holding gains (losses) on investments	(9,146)	10,167	9,760
Reclassification adjustment for net realized capital gain included in net income	(650)	(903)	(194)
Other comprehensive income (loss), before income taxes	(9,796)	9,264	9,566
Income tax benefit (expense) related to items of other comprehensive income (loss)	1,941	(1,945)	(2,009)
Other comprehensive income (loss), net of income taxes	(7,855)	7,319	7,557
Comprehensive income	477	48,663	34,057
Attributable to Nodak Mutual Insurance Company [Member]
Net income (loss)	8,416	40,389	26,401
Other comprehensive income (loss), before income taxes:
Holding gains (losses) on investments	(8,827)	10,051	9,583
Reclassification adjustment for net realized capital gain included in net income	(648)	(902)	(191)
Other comprehensive income (loss), before income taxes	(9,475)	9,149	9,392
Income tax benefit (expense) related to items of other comprehensive income (loss)	1,872	(1,921)	(1,972)
Other comprehensive income (loss), net of income taxes	(7,603)	7,228	7,420
Comprehensive income	813	47,617	33,821
Attributable to Non-Controlling Interest [Member]
Net income (loss)	(84)	955	99
Other comprehensive income (loss), before income taxes:
Holding gains (losses) on investments	(319)	116	177
Reclassification adjustment for net realized capital gain included in net income	(2)	(1)	(3)
Other comprehensive income (loss), before income taxes	(321)	115	174
Income tax benefit (expense) related to items of other comprehensive income (loss)	69	(24)	(37)
Other comprehensive income (loss), net of income taxes	(252)	91	137
Comprehensive income	$ (336)	$ 1,046	$ 236