Liability for Incurred Losses and Loss Adjustment Expenses Net of Reinsurance Recoverables (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Mar. 31, 2015
Liability for unpaid losses and loss adjustment expenses for Property and Casualty Insurance [Abstract]
Reinsurance recoverable, gross	$ 120.9us-gaap_ReinsuranceRecoverablesGross
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease)	$ 7.9

The amount of the other adjustment made to the claims reserves during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437

Name:	us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration