Transactions with Affiliates, Reinsurance Atlantic States Assumed from Pool (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reinsurance Pooling and Other Reinsurance Arrangements [Abstract]
Premiums earned	$ 573,891,506	$ 514,172,696	$ 479,835,610
Unearned premiums	572,958,422	537,189,598
Liability for losses and loss expenses	581,531,000
Affiliated Entity [Member] | Atlantic States [Member]
Reinsurance Pooling and Other Reinsurance Arrangements [Abstract]
Premiums earned	573,891,394	514,172,448	479,835,362
Losses and loss expenses	383,455,320	309,315,497	309,852,141
Unearned premiums	289,976,879	262,004,199	237,106,338
Liability for losses and loss expenses	$ 455,564,733	$ 377,530,215	$ 322,658,731