Consolidated Statements of Income - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Net premiums earned	$ 175,014,872	$ 161,942,637	$ 344,171,019	$ 320,417,916
Investment income, net of investment expenses	5,649,870	5,343,883	11,405,269	10,890,392
Net realized investment gains	1,097,306	715,177	3,646,281	1,186,118
Lease income	127,924	172,629	269,774	350,989
Installment payment fees	1,304,129	1,367,066	2,439,771	2,729,526
Equity in earnings of Donegal Financial Services Corporation	386,615	305,475	619,565	340,702
Total revenues	183,580,716	169,846,867	362,551,679	335,915,643
Expenses:
Net losses and loss expenses	128,005,914	103,193,915	242,439,372	198,771,980
Amortization of deferred policy acquisition costs	28,700,000	26,554,000	56,383,000	52,510,000
Other underwriting expenses	28,259,223	26,578,997	56,748,504	53,217,024
Policyholder dividends	1,212,292	754,682	2,046,557	1,586,569
Interest	382,958	403,882	746,633	812,362
Other expenses	416,798	315,699	859,253	953,477
Total expenses	186,977,185	157,801,175	359,223,319	307,851,412
(Loss) income before income tax (benefit) expense	(3,396,469)	12,045,692	3,328,360	28,064,231
Income tax (benefit) expense	(1,077,821)	3,461,038	542,190	7,630,664
Net (loss) income	$ (2,318,648)	$ 8,584,654	$ 2,786,170	$ 20,433,567
Class A Common Stock [Member]
(Loss) earnings per common share:
Common stock - basic	$ (0.09)	$ 0.33	$ 0.11	$ 0.79
Common stock - diluted	(0.08)	0.32	0.10	0.78
Class B Common Stock [Member]
(Loss) earnings per common share:
Common stock - basic	(0.08)	0.30	0.09	0.72
Common stock - diluted	(0.08)	0.30	0.09	0.72
Common stock - basic and diluted	$ (0.08)	$ 0.30	$ 0.09	$ 0.72