Investment and Mortgage-Backed Securities, Available for Sale (Schedule of Temporarily Impaired Securities, Fair Value and Unrealized losses) (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 408,357,334	$ 240,863,386
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	93,284,383	84,912,501
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	501,641,717	325,775,887
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	17,881,433	3,854,991
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	5,110,493	1,800,444
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	22,991,926	5,655,435
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	42,904,279	36,816,929
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	8,522,110	8,826,508
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	51,426,389	45,643,437
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	638,738	216,012
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	133,847	39,666
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	772,585	255,678
SBA Bonds
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	27,636,662	15,916,497
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	44,662,286	48,791,470
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	72,298,948	64,707,967
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	1,048,385	359,541
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	1,105,676	720,233
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	2,154,061	1,079,774
Tax Exempt Municipal Bonds
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	11,333,397
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	11,333,397
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	641,833
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	641,833
Taxable Municipal Bonds [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	52,021,448	28,032,194
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	7,019,116	4,342,641
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	59,040,564	32,374,835
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	4,295,099	413,490
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	1,082,046	185,897
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	5,377,145	599,387
Mortgage-Backed Securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	274,461,548	160,097,766
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	33,080,871	22,951,882
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	307,542,419	183,049,648
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	11,257,378	2,865,948
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	2,788,924	854,648
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	$ 14,046,302	$ 3,720,596