Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues:
Net premiums earned	$ 124,702,041	$ 114,691,791
Investment income, net of investment expenses	4,815,443	5,089,722
Net realized investment gains (includes $1,340,564 accumulated other comprehensive income reclassifications)	1,340,564	2,309,980
Lease income	215,397	247,365
Installment payment fees	1,710,241	1,834,785
Equity in earnings of Donegal Financial Services Corporation	1,088,906	1,174,519
Total revenues	133,872,592	125,348,162
Expenses:
Net losses and loss expenses	85,533,016	76,609,219
Amortization of deferred policy acquisition costs	19,560,000	17,881,000
Other underwriting expenses	18,751,511	19,246,819
Policyholder dividends	475,273	289,324
Interest	487,149	570,544
Other expenses	982,354	903,522
Total expenses	125,789,303	115,500,428
Income before income tax expense	8,083,289	9,847,734
Income tax expense (includes $455,792 income tax expense from reclassification items)	1,607,853	1,837,587
Net income	$ 6,475,436	$ 8,010,147
Common Class A
Earnings per common share:
Class A common stock - basic	$ 0.26	$ 0.32
Class A common stock - diluted	$ 0.25	$ 0.31
Common Class B
Earnings per common share:
Class A common stock - basic	$ 0.23	$ 0.29
Class A common stock - diluted	$ 0.23	$ 0.29
Class B common stock - basic and diluted	$ 0.23	$ 0.29