Consolidated Statements of Income (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Net premiums earned	$ 146,529,816	$ 133,548,261
Investment income, net of investment expenses	4,948,953	4,615,776
Net realized investment gains (losses)	1,046,521	(88,532)
Lease income	200,073	212,790
Installment payment fees	1,520,325	1,641,550
Equity in earnings of Donegal Financial Services Corporation	526,760	409,242
Total revenues	154,772,448	140,339,087
Expenses:
Net losses and loss expenses	95,939,312	97,632,392
Amortization of deferred policy acquisition costs	24,010,000	21,319,000
Other underwriting expenses	23,833,064	20,458,719
Policyholder dividends	917,837	394,503
Interest	330,538	365,482
Other expenses	726,392	962,207
Total expenses	145,757,143	141,132,303
Income (loss) before income tax expense (benefit)	9,015,305	(793,216)
Income tax expense (benefit)	2,160,969	(158,802)
Net income (loss)	$ 6,854,336	$ (634,414)
Class A Common Stock [Member]
Earnings (loss) per common share:
Common stock - basic	$ 0.26	$ (0.02)
Common stock - diluted	$ 0.25	$ (0.02)
Class B Common Stock [Member]
Earnings (loss) per common share:
Common stock - basic	$ 0.23	$ (0.02)
Common stock - diluted	$ 0.23	$ (0.02)
Common stock - basic and diluted	$ 0.23	$ (0.02)