Debt (Narrative) (Details)			12 Months Ended
	Feb. 28, 2024	Sep. 27, 2021 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Feb. 27, 2024
Line of Credit Facility [Line Items]
Accordion feature permitting the maximum aggregate commitments to increase			$ 730,000,000
Standby letters of credit			$ 725,800
Commitment fee percentage			0.50%
Gain on extinguishment of senior unsecured notes payable			$ 1,631,964	$ 1,831,277	$ 0
Senior notes payable
Line of Credit Facility [Line Items]
Debt issuance costs			1,100,000	1,200,000
Senior Notes Due 2026 | Senior notes payable
Line of Credit Facility [Line Items]
Interest rate		7.00%
Aggregate principal amount		$ 300,000,000
Redemption price, percentage of equity offerings		40.00%
Repurchased and extinguished amount of debt			15,700,000	9,000,000
Debt issuance costs			200,000	100,000
Reacquisition price			14,100,000	7,200,000
Gain on extinguishment of senior unsecured notes payable			1,600,000	1,800,000
Senior Notes Due 2026 | Senior notes payable | Period One
Line of Credit Facility [Line Items]
Redemption price percent		100.00%
Senior Notes Due 2026 | Senior notes payable | Period Two
Line of Credit Facility [Line Items]
Redemption price percent		107.00%
Letter Of Credit, Worker's Compensation
Line of Credit Facility [Line Items]
Standby letters of credit			300,000
Letters of Credit, Investment In Captive Insurance
Line of Credit Facility [Line Items]
Standby letters of credit			425,800
Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity			580,000,000
Amount outstanding			$ 223,400,000
Interest rate			3.50%
Unused borrowing capacity fee			$ 1,640,000	$ 1,290,000	$ 1,340,000
Effective interest rate			9.90%	7.00%	5.00%
Unused amount available			$ 355,900,000
Debt covenants minimum net worth			$ 325,000,000
Fixed charge ratio			2.0
Expiration period			60 days
Revolving Credit Facility | Scenario 1
Line of Credit Facility [Line Items]
Debt covenant, maximum ratio of total debt			2.25
Debt covenant, maximum collateral performance indicator percentage			26.00%
Fixed charge ratio			2.0
Revolving Credit Facility | Scenario 2
Line of Credit Facility [Line Items]
Fixed charge ratio			2.25
Revolving Credit Facility | Revolving Credit Facility, Twelfth Amendment
Line of Credit Facility [Line Items]
Net income available for fixed charges to fixed charges	2.00					2.25
Debt instrument, adjusted net worth limit, percentage	225.00%
Revolving Credit Facility | SOFR
Line of Credit Facility [Line Items]
Variable rate			0.10%
Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Interest rate			4.50%