Litigation and Contingencies (Details) $ in Thousands	1 Months Ended		3 Months Ended	6 Months Ended	12 Months Ended		40 Months Ended
	Jun. 30, 2015	Dec. 31, 2011 lawsuit	Mar. 31, 2016 USD ($)	Jun. 30, 2009	Dec. 31, 2015 USD ($)	Dec. 31, 2013 USD ($)	Mar. 31, 2015 case
Curtailments [Abstract]
Average paid claim reduction due to curtailments (in hundredths)			5.10%		6.70%
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%
Maximum exposure associated with other discussions and legal proceedings			$ 193,000
Class action complaint under RESPA [Abstract]
Period of existing captive reinsurance agreement	10 years		10 years
Civil penalty						$ 2,650
Other Legal Proceedings [Abstract]
Underwriting remedy expense					$ 1,000
Class Action Complaint Under RESPA | Pending Litigation
Class action complaint under RESPA [Abstract]
Number of lawsuits | lawsuit		12
Number of cases dismissed | case							12