Revenue Recognition (Table Text Block)	12 Months Ended
	Mar. 31, 2022
Revenue From Contract With Customer [Abstract]
Lease schedule over next five years and thereafter	Year Ended March 31,     2023   2024   2025   2026   2027   Thereafter           (In thousands)                           Self-moving equipment rentals $ 5,537 $ – $ – $ – $ – $ – Property lease revenues   16,544   11,063   8,180   6,381   5,254   43,931 Total$ 22,081 $ 11,063 $ 8,180 $ 6,381 $ 5,254 $ 43,931
Disaggregation of revenue	Years Ended March 31,     2022   2021   2020           (In thousands)               Revenues recognized over time $   284,401 $   182,278 $   147,565 Revenues recognized at a point in time   414,985   396,600   309,804 Total revenues recognized under ASC 606   699,386   578,878   457,369               Revenues recognized under ASC 842   4,690,434   3,644,798   3,182,902 Revenues recognized under ASC 944   201,666   195,371   200,768 Revenues recognized under ASC 320   148,261   122,938   137,829 Total revenues$  5,739,747 $  4,541,985 $  3,978,868