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Debt - Narrative (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
Mar. 18, 2024 | May 04, 2021 USD ($) $ / shares shares | Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($) shares
Short-Term Debt [Line Items] |  |  |  |  |
Issuance of common stock (in shares) | shares |  | 4,312,500 |  |  | 4,312,500
Issuance of common stock, offering price (in dollars per share) | $ / shares |  | $ 48.00 |  |  |
Gross proceeds from issuance of common stock |  | $ 207,000,000 |  |  |
Total debt |  |  | $ 517,299,000 | $ 458,052,000 |
Accounts receivable |  |  | 171,186,000 | 151,451,000 |
Less: current portion |  |  | 50,000,000 | 40,000,000 |
Present value of lease liabilities |  |  | 12,937,000 | 13,541,000 |
Current portion of long-term debt and finance lease obligation |  |  | 670,000 | 604,000 |
Unsecured Debt |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  | 2,374,000 |  |
Outstanding borrowings |  |  | $ 0 |  |
Hartland, WI |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Finance lease term |  |  | 23 years |  |
Maximum |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Finance lease term |  |  | 23 years |  |
Minimum |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Finance lease term |  |  | 1 year |  |
Term Loan B Facility |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Quarterly principal amortization percentage |  |  | 0.0025 |  |
Excess cash flow percentage |  |  | 0.50 |  |
Line of credit facility, maximum borrowing capacity |  |  | $ 100,000,000 |  |
Leverage ratio prior to June 30, 2021 |  |  | 6.75 |  |
Leverage ratio prior to June 30, 2022 |  |  | 5.50 |  |
Leverage ratio prior to June 30, 2023 |  |  | 4.50 |  |
Leverage ratio on June 30, 2023 and thereafter |  |  | 3.50 |  |
Increase In deferred financing costs |  |  | $ 1,522,000 |  | $ 892,000
Accordion feature, increase limit |  |  | 75,000,000 |  | $ 75,000,000
Debt instrument, basis spread on variable rate | 0.25% |  |  |  |
Long-term debt, gross |  |  | 477,560,000 | 462,560,000 |
Repayments of long-term debt |  |  | 60,000,000 | 40,000,000 |
Less: current portion |  |  | 4,976,000 |  |
Deferred finance costs |  |  | 7,845,000 | 6,323,000 |
Accumulated amortization balances |  |  | $ 2,971,000 | 1,815,000 |
Term Loan B Facility | Secured Overnight Financing Rate (SOFR) |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Debt instrument, basis spread on variable rate | 2.50% |  |  |  |
Term Loan B Facility | Base Rate |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Debt instrument, basis spread on variable rate | 1.50% |  |  |  |
Term Loan B Facility | Maximum |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Excess cash flow step down, percentage |  |  | 25.00% |  |
Term Loan B Facility | Minimum |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Excess cash flow step down, percentage |  |  | 0.00% |  |
Amended and Restated Revolving Credit |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  | $ 175,000,000 |  |
Line of credit facility, increase (decrease), net |  |  | 75,000,000 |  |
Increase In deferred financing costs |  |  | 801,000 |  |
Outstanding borrowings |  |  | 0 |  |
Outstanding letters of credit |  |  | 15,368,000 |  |
Deferred finance costs |  |  | 4,828,000 | 4,027,000 |
Amended and Restated Revolving Credit | Standby Letters of Credit |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Outstanding letters of credit |  |  | 15,368,000 |  |
AR Securitization |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  | 55,000,000 |  |
Total debt |  |  | 45,000,000 |  |
Long-term debt, gross |  |  | 45,000,000 | 0 |
Deferred finance costs |  |  | 536,000 |  |
Accumulated amortization balances |  |  | 149,000 |  |
AR Securitization | United States |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Accounts receivable |  |  | $ 74,590,000 |  |
AR Securitization | Secured Overnight Financing Rate (SOFR) |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Debt instrument, credit spread adjustment on variable rate |  |  | 0.0010 |  |
Debt instrument, basis spread on variable rate |  |  | 1.10% |  |
Line of Credit |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Accumulated amortization balances |  |  | $ 2,655,000 | $ 1,611,000 |
Bank Guarantees | Unsecured Debt |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  | 13,945,000 |  |
Outstanding borrowings |  |  | 11,261,000 |  |
Long-term Debt | Term Loan B Facility |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |
Secured long-term debt, noncurrent |  |  | $ 450,000,000 |  |

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