Revenue Recognition (Table Text Block)	3 Months Ended	9 Months Ended
	Dec. 31, 2020	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Disaggregation Of Revenue		Year Ending December 31,     2021   2022   2023   2024   2025   Thereafter     (Unaudited)     (In thousands)                           Self-moving equipment rentals $ 4,277 $ - $ - $ - $ - $ - Property lease revenues   17,799   12,671   9,600   7,055   5,474   55,849 Total $ 22,076 $ 12,671 $ 9,600 $ 7,055 $ 5,474 $ 55,849
Next five years and thereafter revenue	Quarter Ended December 31,     2020   2019     (Unaudited)     (In thousands)           Revenues recognized over time: $ 51,161 $ 31,695 Revenues recognized at a point in time:   84,820   64,802 Total revenues recognized under ASC 606   135,981   96,497           Revenues recognized under ASC 842 or 840   945,024   745,378 Revenues recognized under ASC 944   53,397   52,223 Revenues recognized under ASC 320   35,580   33,782 Total revenues $ 1,169,982 $ 927,880	Nine Months Ended December 31,     2020   2019     (Unaudited)     (In thousands)           Revenues recognized over time: $ 165,445 $ 119,760 Revenues recognized at a point in time:   304,522   242,238 Total revenues recognized under ASC 606   469,967   361,998           Revenues recognized under ASC 842 or 840   2,780,668   2,540,372 Revenues recognized under ASC 944   145,597   152,344 Revenues recognized under ASC 320   85,895   102,629 Total revenues $ 3,482,127 $ 3,157,343