Leases (Table Text Block)	12 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Leases [Abstract]
Supplemental Balance Sheet Information Related to Leases	As of March 31, 2023 Finance Operating Total (In thousands) Buildings and improvements $ – $ 128,221 $ 128,221 Furniture and equipment 9,687 – 9,687 Rental trailers and other rental equipment 152,294 – 152,294 Rental trucks 949,838 – 949,838 Right-of-use assets, gross 1,111,819 128,221 1,240,040 Less: Accumulated depreciation (637,054) (69,304) (706,358) Right-of-use assets, net$ 474,765 $ 58,917 $ 533,682	As of March 31, 2022 Finance Operating Total (In thousands) Buildings and improvements $ – $ 136,444 $ 136,444 Furniture and equipment 14,731 – 14,731 Rental trailers and other rental equipment 169,514 – 169,514 Rental trucks 1,114,248 – 1,114,248 Right-of-use assets, gross 1,298,493 136,444 1,434,937 Less: Accumulated depreciation (677,669) (62,062) (739,731) Right-of-use assets, net$ 620,824 $ 74,382 $ 695,206
Summary of Weighted-average remaining lease terms and Discount rates	Financing leases March 31, 2023 2022 Weighted average remaining lease term (years) 2 3 Weighted average discount rate 3.8 % 3.7 %	Operating leases March 31, 2023 2022 Weighted average remaining lease term (years) 19.2 16.5 Weighted average discount rate 4.7 % 4.6 %
Lease costs	Twelve Months Ended March 31, 2023 2022 (In thousands) Operating lease costs $ 32,878 $ 30,239 Finance lease cost: Amortization of right-of-use assets $ 81,006 $ 115,199 Interest on lease liabilities 11,199 15,289 Total finance lease cost$ 92,205 $ 130,488
Maturities of Lease Liabilities	Finance leases Operating leases Year ending March 31, (In thousands) 2024 $ 110,812 $ 24,338 2025 77,621 11,540 2026 46,763 4,957 2027 – 3,555 2028 – 2,951 Thereafter – 56,615 Total lease payments 235,196 103,956 Less: imputed interest (11,991) (45,583) Present value of lease liabilities$ 223,205 $ 58,373

Leases (Table Text Block)

12 Months Ended

Mar. 31, 2023

Mar. 31, 2022

Supplemental Balance Sheet Information Related to Leases

As of March 31, 2023 Finance Operating Total (In thousands) Buildings and improvements $ – $ 128,221 $ 128,221 Furniture and equipment 9,687 – 9,687 Rental trailers and other rental equipment 152,294 – 152,294 Rental trucks 949,838 – 949,838 Right-of-use assets, gross 1,111,819 128,221 1,240,040 Less: Accumulated depreciation (637,054) (69,304) (706,358) Right-of-use assets, net$ 474,765 $ 58,917 $ 533,682

As of March 31, 2022 Finance Operating Total (In thousands) Buildings and improvements $ – $ 136,444 $ 136,444 Furniture and equipment 14,731 – 14,731 Rental trailers and other rental equipment 169,514 – 169,514 Rental trucks 1,114,248 – 1,114,248 Right-of-use assets, gross 1,298,493 136,444 1,434,937 Less: Accumulated depreciation (677,669) (62,062) (739,731) Right-of-use assets, net$ 620,824 $ 74,382 $ 695,206

Summary of Weighted-average remaining lease terms and Discount rates

Financing leases March 31, 2023 2022 Weighted average remaining lease term (years) 2 3 Weighted average discount rate 3.8 % 3.7 %

Operating leases March 31, 2023 2022 Weighted average remaining lease term (years) 19.2 16.5 Weighted average discount rate 4.7 % 4.6 %

Lease costs

Twelve Months Ended March 31, 2023 2022 (In thousands) Operating lease costs $ 32,878 $ 30,239 Finance lease cost: Amortization of right-of-use assets $ 81,006 $ 115,199 Interest on lease liabilities 11,199 15,289 Total finance lease cost$ 92,205 $ 130,488

Maturities of Lease Liabilities

Finance leases Operating leases Year ending March 31, (In thousands) 2024 $ 110,812 $ 24,338 2025 77,621 11,540 2026 46,763 4,957 2027 – 3,555 2028 – 2,951 Thereafter – 56,615 Total lease payments 235,196 103,956 Less: imputed interest (11,991) (45,583) Present value of lease liabilities$ 223,205 $ 58,373