Schedule II - Condensed Statement of Cash Flows (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Activities
Net income	$ 14,796,738	$ 11,190,907	$ 6,933,936
Depreciation	669,727	486,922	475,679
Amortization, net	507,111	468,006	338,967
Net realized loss (gain) on investments	(195,800)	(1,066,239)	(28,559)
Net (earnings) loss from other investments	(1,257,266)	(1,674,594)	(749,688)
(Benefit) provision for deferred income taxes	1,804,000	(292,000)	21,000
Excess tax benefit	946,605	22,101	0
(Increase) decrease in receivables	1,569,167	(4,912,295)	646,786
Increase in income taxes recoverable	(366,772)	0	0
(Increase) decrease in other assets	(2,906,224)	(407,252)	77,056
(Decrease) increase in accounts payable and accrued liabilities	4,923,858	2,372,995	1,913,799
Net cash used in operating activities	16,251,090	8,707,514	9,007,159
Investing Activities
Capital contribution to subsidiaries	0	(350,000)	0
Purchases of available-for-sale securities	(23,466,037)	(15,899,439)	(15,318,418)
Purchases of short-term securities	(2,638,908)	(6,347,527)	(1,883,562)
Purchases of and net earnings from other investments	(1,369,210)	(3,441,412)	(853,599)
Proceeds from sales and maturities of available-for-sale securities	9,892,634	15,646,381	9,851,523
Proceeds from sales and maturities of short-term securities	8,280,183	6,892,141	14,974,850
Proceeds from sales and distributions of other investments	2,107,675	2,301,647	861,865
Proceeds from sales of other assets	40,366	220,455	0
Purchases of property	(1,424,108)	(568,728)	(361,207)
Proceeds from disposals of property	24,335	65,837	31,157
Net cash provided by investing activities	(8,553,070)	(1,480,645)	7,302,609
Financing Activities
Repurchases of common stock	(4,262,260)	(3,975,532)	(5,940,463)
Exercise of options	75,797	160,557	155,163
Dividends paid	(657,914)	(603,334)	(599,241)
Net cash used in financing activities	(4,881,277)	(4,459,109)	(6,384,541)
Net (Decrease) Increase in Cash and Cash Equivalents	2,816,743	2,767,760	9,925,227
Cash and Cash Equivalents, Beginning of Period	20,810,018	18,042,258	8,117,031
Cash and Cash Equivalents, End of Period	23,626,761	20,810,018	18,042,258
Parent Company
Operating Activities
Net income	14,796,738	11,190,907	6,933,936
Equity in net earnings of subsidiaries	(15,164,894)	(10,992,815)	(6,851,779)
Depreciation	136,031	133,334	128,215
Amortization, net	69,969	51,111	(15,859)
Issuance of common stock in payment of bonuses and fees	76,110	54,041	44,205
Net realized loss (gain) on investments	50,778	(616,001)	81,389
Net (earnings) loss from other investments	(32,499)	91,256	1,723
(Benefit) provision for deferred income taxes	(93,000)	48,000	(94,000)
Excess tax benefit	9,042	0	0
(Increase) decrease in receivables	(146,247)	368,574	(838,208)
Increase in income taxes recoverable	(1,646,373)	(398,445)	(137,379)
(Increase) decrease in other assets	(101)	20,224	21,836
(Decrease) increase in accounts payable and accrued liabilities	(8,118)	(124,799)	445,758
Net cash used in operating activities	(1,952,564)	(174,613)	(280,163)
Investing Activities
Capital contribution to subsidiaries	0	(250,000)	0
Dividends received from subsidiaries	9,252,919	5,609,489	223,331
Purchases of available-for-sale securities	(10,360,919)	(4,960,208)	(4,625,140)
Purchases of short-term securities	(58,283)	(3,565)	(203,530)
Purchases of and net earnings from other investments	(49,485)	(94,881)	(666,935)
Proceeds from sales and maturities of available-for-sale securities	3,027,896	5,033,298	1,601,297
Proceeds from sales and maturities of short-term securities	2,748,876	3,641,978	13,403,243
Proceeds from sales and distributions of other investments	45,384	505,832	8,064
Proceeds from sales of other assets	4,832	176,815	0
Purchases of property	(24,820)	(98,722)	(96,161)
Proceeds from disposals of property	7,200	0	0
Net cash provided by investing activities	4,593,600	9,560,036	9,644,169
Financing Activities
Repurchases of common stock	(4,262,260)	(3,975,532)	(5,940,463)
Exercise of options	75,797	160,557	155,163
Dividends paid	(657,914)	(603,334)	(599,241)
Net cash used in financing activities	(4,844,377)	(4,418,309)	(6,384,541)
Net (Decrease) Increase in Cash and Cash Equivalents	(2,203,341)	4,967,114	2,979,465
Cash and Cash Equivalents, Beginning of Period	9,414,297	4,447,183	1,467,718
Cash and Cash Equivalents, End of Period	7,210,956	9,414,297	4,447,183
Supplemental Disclosures:
Income tax payments, net	$ 5,583,000	$ 4,392,000	$ 2,911,000