Reinsurance (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014 Company	Sep. 30, 2013	Sep. 30, 2014 Company	Sep. 30, 2013	Dec. 31, 2013
Reinsurance [Abstract]
Percentage of quota share (in hundredths)			30.00%
Percentage of ceding commission (in hundredths)			20.00%
Percentage quota share in addendum (in hundredths)			40.00%
Profit commission receivable	$ 68,952,000		$ 68,952,000		$ 2,368,000
Number of other mortgage insurers agreeing to similar CFPB settlements	3		3
Period of existing captive reinsurance agreement			10 years
Reinsurance recoverable on loss reserves related to captive agreements	48,000,000		48,000,000		64,000,000
Fair value of trust fund assets under captive agreements	205,000,000		205,000,000		226,000,000
Fair value of trust fund assets under captive agreements, no reinsurance recoverable on loss reserves	6,000,000		6,000,000		23,000,000
Premiums Written and Earned [Abstract]
Ceded premiums written, net of profit commission	32,536,000	13,485,000	87,450,000	31,473,000
Ceded premiums earned, net of profit commission			79,460,000	23,499,000
Ceded losses incurred			22,451,000	21,238,000
Ceding commissions			$ 28,994,000	$ 4,646,000