Liability for Incurred Losses and Loss Adjustment Expenses Net of Reinsurance Recoverables (Details) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Liability for Unpaid Claims and Claims Adjustment Expense, Adjustment of Opening Balance [Line Items]
Reinsurance recoverable	$ 147,301,000	$ 186,533,000
Operating Segments [Member] | Property and Casualty Insurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense, Adjustment of Opening Balance [Line Items]
Reinsurance recoverable	136,535,000	176,439,000	223,865,000	167,315,000
Increase in liability for incurred losses and loss adjustment expenses	$ 4,900,000