Consolidated Statements of Income and Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues
Net premiums earned (includes affiliated reinsurance of $212,591,341, $192,861,276 and $204,708,630 - see note 3)	$ 776,015,201	$ 742,040,339	$ 756,078,400
Investment income, net of investment expenses	31,125,631	29,504,466	29,514,955
Installment payment fees	2,416,873	3,063,097	4,134,749
Lease income	430,800	434,089	443,750
Net investment gains (includes $382,602, $572,106 and $147,236 accumulated other comprehensive income reclassification)	6,477,286	2,777,919	21,984,617
Equity in earnings of Donegal Financial Services Corporation	0	0	295,000
Total revenues	816,465,791	777,819,910	812,451,471
Expenses
Net losses and loss expenses (includes affiliated reinsurance of $131,367,599, $87,374,791 and $103,218,679 - see note 3)	520,709,542	459,764,293	506,387,664
Amortization of deferred policy acquisition costs	128,733,000	119,072,000	122,443,000
Other underwriting expenses	129,367,893	125,862,651	114,561,741
Policyholder dividends	5,198,515	7,394,310	8,978,406
Interest	895,605	1,196,406	1,579,299
Other, net	1,222,728	1,257,747	1,420,331
Total expenses	786,127,283	714,547,407	755,370,441
Income before income tax expense	30,338,508	63,272,503	57,081,030
Income tax expense (includes $80,346, $120,142 and $30,920 income tax expense from reclassification items)	5,084,334	10,457,251	9,929,286
Net income	25,254,174	52,815,252	47,151,744
Statements of Comprehensive Income
Net income	25,254,174	52,815,252	47,151,744
Unrealized (loss) gain on securities:
Unrealized holding (loss) gain arising during the period, net of income tax (benefit) expense of ($2,008,078), $2,944,892 and $3,947,082	(7,544,805)	11,078,406	14,848,545
Reclassification adjustment for gains included in net income, net of income tax expense of $80,346, $120,142 and $30,920	(302,256)	(451,964)	(116,316)
Other comprehensive (loss) income	(7,847,061)	10,626,442	14,732,229
Comprehensive income	$ 17,407,113	$ 63,441,694	$ 61,883,973
Class A Common Stock [Member]
Basic earnings per common share:
Basic (in dollars per share)	$ 0.83	$ 1.84	$ 1.68
Diluted earnings per common share:
Diluted (in dollars per share)	0.83	1.83	1.67
Class B Common Stock [Member]
Basic earnings per common share:
Basic (in dollars per share)	0.74	1.65	1.51
Diluted earnings per common share:
Diluted (in dollars per share)	$ 0.74	$ 1.65	$ 1.51