Life Insurance Liabilities (Present Value Expected Future Policy Benefits) (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Mar. 31, 2024	Mar. 31, 2023
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Claims And Claims Adjustment Expense	$ 833,632	$ 865,397
Moving and Storage Consolidations [Member]
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Claims And Claims Adjustment Expense	318,669	324,642
Property and Casualty Insurance [Member]
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Claims And Claims Adjustment Expense	132,264	150,148
Life Insurance Segment [Member]
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Balance, beginning of year	205,389	223,118
Beginning balance at original discount rate	204,306	225,071
Effect of actual variances from expected experience			$ 1,393	$ 565
Adjusted beginning of year balance			$ 512,720	$ 533,123
Issuances	4,780	5,211
Interest accrual	4,998	5,554
Net premium collected	26,560	27,720
Ending balance at original discount rate	194,972	215,677
Effect of changes in discount rate assumptions (AOCI)	10,313	949
Balance, end of the year	493,214	524,729
End of period, LFPB, net	302,332	310,702
Life Insurance Segment [Member] | Oxford
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Claims And Claims Adjustment Expense	382,699	390,607
Payout annuities and market risk benefits
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Future Policy Benefits	24,448	30,685
Health Insurance Product Line [Member]
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Future Policy Benefits	17,238	12,563
Life and annuity claims in course of settlement and claims incurred but not yet reported / Reinsurance losses payable
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Future Policy Benefits	28,952	10,101
Life DPL / Other life and health
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Future Policy Benefits	9,553	$ 26,556
LFPB flooring effect
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Future Policy Benefits	$ 176