Disaggregation of revenue (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Revenue From Contract With Customer [Abstract]
Lease schedule over next five years and thereafter	Year Ended March 31,     2021   2022   2023   2024   2025   Thereafter           (In thousands)                           Self-moving equipment rentals $ 2,139 $ – $ – $ – $ – $ – Property lease revenues   20,715   16,927   13,250   9,834   7,102   58,379 Total $ 22,854 $ 16,927 $ 13,250 $ 9,834 $ 7,102 $ 58,379
Disaggregation of revenue	Years Ended March 31,     2020   2019   2018           (In thousands)               Revenues recognized over time $ 147,565 $ 2,814,732 $ 2,617,990 Revenues recognized at a point in time   309,804   305,408   301,152 Total revenues recognized under ASC 606   457,369   3,120,140   2,919,142               Revenues recognized under ASC 842 or 840   3,182,902   406,070   353,924 Revenues recognized under ASC 944   200,768   131,563   217,575 Revenues recognized under ASC 320   137,829   110,934   110,473 Total revenues $ 3,978,868 $ 3,768,707 $ 3,601,114