Life Insurance Liabilities (Present Value Expected Future Policy Benefits) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2024	Jun. 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	$ 841,861	$ 878,436
Oxford | Life Insurance [Member]
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Claims And Claims Adjustment Expense	384,875	401,467
Moving and Storage Consolidations [Member]
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Claims And Claims Adjustment Expense	327,497	328,009
Property and Casualty Insurance [Member]
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Claims And Claims Adjustment Expense	129,489	148,960
Life Insurance Segment [Member]
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Balance, beginning of year	522,122	530,983
Beginning balance at original discount rate	514,113	533,688
Effect of actual variances from expected experience			$ 464	$ 355
Adjusted beginning of year balance			$ 513,649	$ 534,043
Issuances	2,002	2,398
Interest accrual	6,279	6,534
Net premium collected	14,142	14,311
Ending balance at original discount rate	507,788	528,664
Effect of changes in discount rate assumptions (AOCI)	4,331	10,786
Balance, end of the year	503,457	539,450
End of period, LFPB, net	306,724	316,809
Payout annuities and market risk benefits
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Future Policy Benefits	24,569	31,375
Health Insurance Product Line [Member]
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Future Policy Benefits	13,189	14,178
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	30,916	28,910
Life DPL / Other life and health
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Future Policy Benefits	9,408	$ 10,195
LFPB flooring effect
Liability For Future Policy Benefit Expected Future Policy Benefit [Roll Forward]
Liability For Future Policy Benefits	$ 69