Related Party Transactions (Related Party Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Mar. 31, 2025
Related Party Transaction [Line Items]
Related party assets	$ 60,630	$ 45,003
Blackwater [Member]
Related Party Transaction [Line Items]
Related party assets	41,445	28,442
Mercury [Member]
Related Party Transaction [Line Items]
Related party assets	16,528	12,517
Insurance Group [Member]
Related Party Transaction [Line Items]
Related party assets	$ 2,657	$ 4,044