Consolidated Statements Of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Activities
Net income	$ 19,515,452	$ 12,549,053	$ 9,672,498
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	1,306,643	1,105,839	833,104
Amortization of investments, net	772,100	728,510	630,782
Amortization of other intangible assets	213,795	0	0
Amortization related to postretirement benefits obligation	8,941	7,904	2,217
Share-based compensation expense related to stock appreciation rights and options	132,098	137,762	120,891
Net (gain) loss on disposals of property	(12,439)	(24,867)	24,608
Net realized (gain) loss on investments	(768,436)	116,163	(268,294)
Net earnings from other investments	(1,750,485)	(2,002,276)	(1,450,980)
Provision for claims	242,953	4,478,494	5,229,716
Provision for deferred income taxes	2,790,000	1,015,000	611,000
Changes in assets and liabilities:
(Increase) decrease in receivables	(261,464)	217,594	206,041
Decrease (increase) in other assets	2,631,205	(4,879,418)	(393,359)
Decrease in current income taxes recoverable	0	0	366,772
(Decrease) increase in accounts payable and accrued liabilities	(581,518)	6,689,204	(2,080,492)
Increase in current income taxes payable	1,022,077	118,163	92,192
Payments of claims, net of recoveries	(2,725,953)	(3,367,494)	(3,912,716)
Net cash provided by (used in) operating activities	22,534,969	16,889,631	9,683,980
Investing Activities
Purchases of available-for-sale securities	(19,424,849)	(20,164,353)	(30,899,452)
Purchases of short-term securities	(1,775,239)	(4,593,240)	(911,188)
Purchases of other investments	(2,743,413)	(3,717,978)	(1,689,950)
Investment in subsidiary	(9,141)	(72,600)	0
Proceeds from sales and maturities of available-for-sale securities	20,258,089	22,151,408	12,472,817
Proceeds from sales and maturities of short-term securities	2,081,805	304,827	6,260,568
Proceeds from sales and distributions of other investments	3,437,999	3,911,286	1,584,337
Proceeds from sales of other assets	17,601	149,128	38,052
Purchase of subsidiary, net of cash received	(8,316,155)	0	0
Purchase of redeemable noncontrolling interest of subsidiary	0	0	(515,275)
Purchases of property, equipment and software	(2,456,951)	(2,742,619)	(2,017,379)
Proceeds from disposals of property	91,656	75,060	24,400
Net cash provided by (used in) investing activities	(8,838,598)	(4,699,081)	(15,653,070)
Financing Activities
Repurchases of common stock	(6,219,670)	(5,483,953)	(1,055,765)
Exercise of stock appreciation rights and options	(200)	54,988	27,100
Proceeds from note payable	6,000,000	0	0
Payments on note payable	(6,000,000)	0	0
Distribution to noncontrolling interest	0	0	(168,057)
Subsidiary return of capital	0	(35,000)	0
Excess tax benefits related to exercise of stock options and SARs	32,293	26,875	15,999
Dividends paid	(1,370,390)	(789,907)	(650,433)
Net cash provided by (used in) financing activities	(7,557,967)	(6,226,997)	(1,831,156)
Net Increase (Decrease) in Cash and Cash Equivalents	6,138,404	5,963,553	(7,800,246)
Cash and Cash Equivalents, Beginning of Period	21,790,068	15,826,515	23,626,761
Cash and Cash Equivalents, End of Period	27,928,472	21,790,068	15,826,515
Cash Paid During the Year for:
Income tax payments, net	5,068,400	4,658,000	2,744,100
Non cash net unrealized (gain) loss on investments, net of deferred tax (provision) benefit of $(133,892), $708,564 and $(805,779) for 2016, 2015 and 2014, respectively	(272,906)	1,336,756	(1,538,740)
Adjustments to postretirement benefits obligation, net of deferred tax benefit of $192, $21,612 and $16,021 for 2016, 2015 and 2014, respectively	374	41,954	31,100
Changes in Financial Statement Amounts Related to Purchase of Subsidiaries, Net of Cash Received
Goodwill and other intangibles acquired	(11,249,851)	0	0
Title plant acquired (in prepaid expenses and other assets)	(690,000)	0	0
Fixed assets acquired	(533,424)	0	0
Prepaid and other assets acquired	(15,233)	0	0
Accounts payable and accrued liabilities assumed	1,683,844	0	0
Deferred income taxes	2,488,509	0	0
Purchase of subsidiary, net of cash received	$ (8,316,155)	$ 0	$ 0