Earnings Per Share (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Income (Numerator)
Net income	$ 25,643,000	$ 5,759,000	$ (1,366,000)	$ (8,803,000)	$ 18,382,000	$ 7,327,000	$ 12,439,000	$ 15,771,000	$ 21,231,990	$ 53,919,837	$ 88,282,828
Shares (Denominator)
Income available to common shareholders (in shares)									5,749,492	6,072,170	6,493,898
Effect of dilutive securities options and restricted stock (in shares)									149,178	291,896	178,212
Income available to common shareholders, diluted (in shares)									5,898,670	6,364,066	6,672,110
Basic (in dollars per share)	$ 4.44	$ 1.00	$ (0.24)	$ (1.53)	$ 3.10	$ 1.20	$ 2.04	$ 2.56	$ 3.69	$ 8.88	$ 13.59
Diluted (in dollars per share)	$ 4.37	$ 0.98	$ (0.24)	$ (1.53)	$ 2.97	$ 1.14	$ 1.94	$ 2.44	$ 3.60	$ 8.47	$ 13.23
Antidilutive securities (in shares)									333,072	412,015	608,087