CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Investments:
Securities available-for-sale, amortized cost	$ 961,013,661	$ 920,843,939
Equity securities available-for-sale, cost	115,397,494	111,851,963
Deferred policy acquisition costs from affiliates	36,603,042	34,425,593
Affiliated other assets	7,064,353	5,760,369
LIABILITIES
Affiliated losses and settlement expenses	589,088,254	577,476,988
Unearned premiums from affiliates	209,739,584	196,215,465
Affiliated other liabilities	$ 16,339,440	$ 22,794,304
STOCKHOLDERS' EQUITY
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	13,116,098	12,909,457
Common stock, shares outstanding (in shares)	13,116,098	12,909,457