Litigation and Contingencies (Details) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2015 USD ($) Lawsuit Case	Jun. 30, 2009	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)
Curtailments [Abstract]
Average paid claim reduction due to curtailments (in hundredths)	7.40%		6.70%
Number of days after claim paid within which objection must be received for review	90 days
Claims resolved by rescissions [Abstract]
Percentage of claims received in a quarter resolved by rescission, lower range limit (in hundredths)	5.00%
Percentage of claims received in a quarter resolved by rescission, upper range limit (in hundredths)		28.00%
Mitigation of incurred losses by rescission of policies					$ 200,000	$ 2,500,000
Statute of limitations to bring legal proceedings disputing right to rescind coverage	3 years
Statute of limitations to bring legal proceedings after notice of rescission	2 years
Percentage of loans covered by CHL Agreement for which consent was received (in hundredths)	89.00%
Maximum exposure above estimate provision for claims paying practices	$ 122,000
Maximum exposure associated with other discussions and legal proceedings	$ 218,000
Class action complaint under RESPA [Abstract]
Period of existing captive reinsurance agreement	10 years
Civil penalty				$ 2,650
Other Legal Proceedings [Abstract]
Underwriting remedy expense	$ 1,000		$ 4,000
Class Action Complaint Under RESPA [Member] | Pending Litigation [Member]
Class action complaint under RESPA [Abstract]
Number of lawsuits | Lawsuit	12
Number of cases dismissed | Case	12
Lawsuits Alleging Improper Recording And Foreclosure Activities By MERS [Member] | Pending Litigation [Member]
Lawsuits alleging improper recording and foreclosure activities by MERS [Abstract]
Number of lawsuits naming non-insurance subsidiary as defendant | Lawsuit	8
Number of lawsuits naming subsidiary as defendant that were dismissed | Lawsuit	8