Commitments and Contingent Liabilities (Details) (USD $)	3 Months Ended
	Jun. 30, 2012
Loss Contingencies [Line Items]
Domicile of litigation	Pennsylvania
Suit 1 [Member]
Loss Contingencies [Line Items]
Date filed	June 8, 2006
Name of defendant	Old Republic National Title Insurance Company ("ORNTIC")
Name of plaintiff	Markocki et al.
Domicile of litigation	Pennsylvania
Suit 2 [Member]
Loss Contingencies [Line Items]
Date filed	February 8, 2008
Name of plaintiff	Ahmad et al.
Domicile of litigation	Texas
Pending or Threatened Litigation B [Member]
Loss Contingencies [Line Items]
Name of defendant	Old Republic Home Protection ("ORHP")
Pending or Threatened Litigation C [Member]
Loss Contingencies [Line Items]
Name of defendant	Old Republic Home Protection Company
Pending or Threatened Litigation D [Member]
Loss Contingencies [Line Items]
Date filed	December 19, 2008
Name of defendant	Countrywide Bank FSB, Countrywide Home Loans, Inc. ("Countrywide") and Bank of New York Mellon, BNY Mellon Trust of Delaware
Name of plaintiff	Old Republic Insurance Company and Old Republic Insured Credit Services, Inc., ("Old Republic")
Domicile of litigation	Illinois
Pending or Threatened Litigation E [Member]
Loss Contingencies [Line Items]
Date filed	November 3, 2010
Name of defendant	Old Republic Insurance Company ("ORIC")
Name of plaintiff	Bank of America, N.A. ("B of A")
Domicile of litigation	North Carolina
Minimum damages sought	320
Pending or Threatened Litigation F [Member]
Loss Contingencies [Line Items]
Date filed	December 31, 2009
Name of defendant	Countrywide Financial Corporation, Countrywide Home Loans, Inc., The Bank of New York Mellon Trust Company, N.A., BAC Home Loans Servicing, LP, and Bank of America N.A. as successor in interest to Countrywide Bank, N.A. (together "Countrywide")
Name of plaintiff	Republic Mortgage Insurance Company and Republic Mortgage Insurance Company of North Carolina (together "RMIC")
Domicile of litigation	New York
Minimum number of defaulted loans for which the company has rescinded or denied coverage (in loans)	1,500
Pending or Threatened Litigation H [Member]
Loss Contingencies [Line Items]
Date filed	July 19, 2011
Name of defendant	Republic Mortgage Insurance Company
Name of plaintiff	J.P. Morgan Chase Bank, N.A. ("Chase")
Domicile of litigation	New Jersey
Minimum number of defaulted loans for which the company has rescinded or denied coverage (in loans)	377
Pending or Threatened Litigation K [Member] | Suit 1 [Member]
Loss Contingencies [Line Items]
Name of plaintiff	Samp, Komarchuk, Whitaker
Domicile of litigation	California
Pending or Threatened Litigation K [Member] | Suit 2 [Member]
Loss Contingencies [Line Items]
Name of plaintiff	White, Hightower
Domicile of litigation	Pennsylvania
Pending or Threatened Litigation K [Member] | Suit Four [Member]
Loss Contingencies [Line Items]
Name of plaintiff	Menichino
Pending or Threatened Litigation K [Member] | Suit Six [Member]
Loss Contingencies [Line Items]
Name of plaintiff	McCarn
Pending or Threatened Litigation K [Member] | Suit Seven [Member]
Loss Contingencies [Line Items]
Name of plaintiff	Riddle
Pending or Threatened Litigation K [Member] | Suit Eight [Member]
Loss Contingencies [Line Items]
Name of plaintiff	Manners
Pending or Threatened Litigation J [Member]
Loss Contingencies [Line Items]
Date filed	January 27, 2012
Name of defendant	Old Republic International Corporation, Old Republic Home Protection Company, Inc., Old Republic National Title Insurance Company, Mississippi Valley Title Insurance Company, American Guaranty Title Insurance Company, Republic Mortgage Insurance Company
Name of plaintiff	Campion
Domicile of litigation	California