Consolidated Statement of Stockholders' Equity - USD ($)	Common Stock [Member] Class A Common Stock [Member]	Common Stock [Member] Class A Common Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member] Class B Common Stock [Member]	Common Stock [Member] Class B Common Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury Stock [Member]	Treasury Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance at Dec. 31, 2021	$ 287,562		$ 56,492		$ 304,889,481		$ 3,283,551		$ 263,745,358		$ (41,226,357)		$ 531,036,087
Beginning balance (in shares) at Dec. 31, 2021	28,756,203		5,649,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (stock compensation plans)	$ 335		$ 0		423,665		0		0		0		424,000
Issuance of common stock (stock compensation plans) (in shares)	33,407		0
Share-based compensation	$ 9		$ 0		256,451		0		0		0		256,460
Share-based compensation (in shares)	900		0
Net income (loss)	$ 0		$ 0		0		0		13,145,029		0		13,145,029
Cash dividends declared	0		0		0		0		(5,490)		0		(5,490)
Grant of stock options	0		0		98,409		0		(98,409)		0		0
Other comprehensive income (loss)	0		0		0		(20,590,225)		0		0		(20,590,225)
Ending balance at Mar. 31, 2022	$ 287,906		$ 56,492		305,668,006		(17,306,674)		276,786,488		(41,226,357)		524,265,861
Ending balance (in shares) at Mar. 31, 2022	28,790,510		5,649,240
Beginning balance at Dec. 31, 2021	$ 287,562		$ 56,492		304,889,481		3,283,551		263,745,358		(41,226,357)		531,036,087
Beginning balance (in shares) at Dec. 31, 2021	28,756,203		5,649,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)													(5,438,599)
Other comprehensive income (loss)													(50,254,603)
Ending balance at Sep. 30, 2022	$ 298,400		$ 56,492		321,363,789		(46,971,052)		247,682,127		(41,226,357)		481,203,399
Ending balance (in shares) at Sep. 30, 2022	29,839,927		5,649,240
Beginning balance at Mar. 31, 2022	$ 287,906		$ 56,492		305,668,006		(17,306,674)		276,786,488		(41,226,357)		524,265,861
Beginning balance (in shares) at Mar. 31, 2022	28,790,510		5,649,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (stock compensation plans)	$ 547		$ 0		736,349		0		0		0		736,896
Issuance of common stock (stock compensation plans) (in shares)	54,743		0
Share-based compensation	$ 7,759		$ 0		11,476,429		0		0		0		11,484,188
Share-based compensation (in shares)	775,898		0
Net income (loss)	$ 0		$ 0		0		0		(8,207,757)		0		(8,207,757)
Cash dividends declared	0		0		0		0		(5,086,617)		0		(5,086,617)
Grant of stock options	0		0		59,216		0		(59,216)		0		0
Other comprehensive income (loss)	0		0		0		(12,170,089)		0		0		(12,170,089)
Ending balance at Jun. 30, 2022	$ 296,212		$ 56,492		317,940,000		(29,476,763)		263,432,898		(41,226,357)		511,022,482
Ending balance (in shares) at Jun. 30, 2022	29,621,151		5,649,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (stock compensation plans)	$ 235		$ 0		270,887		0		0		0		271,122
Issuance of common stock (stock compensation plans) (in shares)	23,454		0
Share-based compensation	$ 1,953		$ 0		3,013,995		0		0		0		3,015,948
Share-based compensation (in shares)	195,322		0
Net income (loss)	$ 0		$ 0		0		0		(10,375,871)		0		(10,375,871)
Cash dividends declared	0		0		0		0		(5,235,993)		0		(5,235,993)
Grant of stock options	0		0		138,907		0		(138,907)		0		0
Other comprehensive income (loss)	0		0		0		(17,494,289)		0		0		(17,494,289)
Ending balance at Sep. 30, 2022	$ 298,400		$ 56,492		321,363,789		(46,971,052)		247,682,127		(41,226,357)		481,203,399
Ending balance (in shares) at Sep. 30, 2022	29,839,927		5,649,240
Beginning balance at Dec. 31, 2022	$ 301,203		$ 56,492		325,601,647		(41,703,747)		240,563,774		(41,226,357)		483,593,012
Beginning balance (in shares) at Dec. 31, 2022	30,120,263		5,649,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (stock compensation plans)	$ 350		$ 0		440,746		0		0		0		441,096
Issuance of common stock (stock compensation plans) (in shares)	35,045		0
Share-based compensation	$ 1,431		$ 0		2,218,355		0		0		0		2,219,786
Share-based compensation (in shares)	143,004		0
Net income (loss)	$ 0		$ 0		0		0		5,203,596		0		5,203,596
Cash dividends declared	0		0		0		0		(7,057)		0		(7,057)
Grant of stock options	0		0		114,724		0		(114,724)		0		0
Other comprehensive income (loss)	0		0		0		4,007,638		0		0		4,007,638
Ending balance at Mar. 31, 2023	$ 302,984		$ 56,492		328,375,472		(37,696,109)		243,749,687		(41,226,357)		493,562,169
Ending balance (ASU 2016-13 [Member]) at Mar. 31, 2023		$ 0		$ 0		$ 0		$ 0		$ (1,895,902)		$ 0		$ (1,895,902)
Ending balance (in shares) at Mar. 31, 2023	30,298,312		5,649,240
Ending balance (in shares) (ASU 2016-13 [Member]) at Mar. 31, 2023		0		0
Beginning balance at Dec. 31, 2022	$ 301,203		$ 56,492		325,601,647		(41,703,747)		240,563,774		(41,226,357)		483,593,012
Beginning balance (in shares) at Dec. 31, 2022	30,120,263		5,649,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)													6,395,718
Other comprehensive income (loss)													(11,395,476)
Ending balance at Sep. 30, 2023	$ 306,297		$ 56,492		333,559,263		(50,295,321)		230,939,204		(41,226,357)		473,339,578
Ending balance (in shares) at Sep. 30, 2023	30,629,636		5,649,240
Beginning balance at Mar. 31, 2023	$ 302,984		$ 56,492		328,375,472		(37,696,109)		243,749,687		(41,226,357)		493,562,169
Beginning balance (in shares) at Mar. 31, 2023	30,298,312		5,649,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (stock compensation plans)	$ 447		$ 0		668,933		0		0		0		669,380
Issuance of common stock (stock compensation plans) (in shares)	44,664		0
Share-based compensation	$ 1,958		$ 0		2,966,842		0		0		0		2,968,800
Share-based compensation (in shares)	195,893		0
Net income (loss)	$ 0		$ 0		0		0		1,997,423		0		1,997,423
Cash dividends declared	0		0		0		0		(5,498,873)		0		(5,498,873)
Grant of stock options	0		0		61,749		0		(61,749)		0		0
Other comprehensive income (loss)	0		0		0		(7,505,333)		0		0		(7,505,333)
Ending balance at Jun. 30, 2023	$ 305,389		$ 56,492		332,072,996		(45,201,442)		240,186,488		(41,226,357)		486,193,566
Ending balance (in shares) at Jun. 30, 2023	30,538,869		5,649,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (stock compensation plans)	$ 289		$ 0		354,337		0		0		0		354,626
Issuance of common stock (stock compensation plans) (in shares)	28,912		0
Share-based compensation	$ 619		$ 0		1,030,458		0		0		0		1,031,077
Share-based compensation (in shares)	61,855		0
Net income (loss)	$ 0		$ 0		0		0		(805,301)		0		(805,301)
Cash dividends declared	0		0		0		0		(5,536,609)		0		(5,536,609)
Grant of stock options	0		0		101,472		0		(101,472)		0		0
Reclassification of held to maturity transfer	0		0		0		2,803,902		(2,803,902)		0		0
Other comprehensive income (loss)	0		0		0		(7,897,781)		0		0		(7,897,781)
Ending balance at Sep. 30, 2023	$ 306,297		$ 56,492		$ 333,559,263		$ (50,295,321)		$ 230,939,204		$ (41,226,357)		$ 473,339,578
Ending balance (in shares) at Sep. 30, 2023	30,629,636		5,649,240