Commitments and Contingent Liabilities (Details)	12 Months Ended
	Dec. 31, 2013 loan
Pending or Threatened Litigation F [Member]
Loss Contingencies [Line Items]
Date filed	December 31, 2009
Name of plaintiff	Republic Mortgage Insurance Company and Republic Mortgage Insurance Company of North Carolina (together "RMIC")
Domicile of litigation	New York
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")
Minimum number of defaulted loans for which company has rescinded or denied coverage	1,500
Pending or Threatened Litigation M [Member]
Loss Contingencies [Line Items]
Date filed	October 10, 2012
Name of plaintiff	PNC Bank, N.A.
Domicile of litigation	Pennsylvania
Name of defendant	RMIC
Minimum number of defaulted loans for which company has rescinded or denied coverage	248