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Related Party Transactions (Related Party Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Mar. 31, 2015
--- | --- | ---
Related party assets: |  |  |
Related party assets |  | $ 92,677 | $ 141,790
Private Mini [Member] |  |  |
Related party assets: |  |  |
U-Haul notes, receivables and interest |  | 6,982 | 59,375
Sac Holdings [Member] |  |  |
Related party assets: |  |  |
Notes receivable |  | 49,614 | 50,428
U-Haul interest receivable |  | 4,869 | 4,579
U-Haul receivables |  | 21,509 | 20,108
Mercury [Member] |  |  |
Related party assets: |  |  |
U-Haul receivables |  | 9,046 | 6,667
Insurance Group [Member] |  |  |
Related party assets: |  |  |
Other | [1] | $ 657 | $ 633
[1] | Timing differences for intercompany balances with insurance subsidiaries.

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