Loss Reserves, Change in Liability and Claims Adjustment Expense (Details) (USD $)	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2014 Loan		Jun. 30, 2013 Loan		Jun. 30, 2014 Loan		Jun. 30, 2013 Loan		Dec. 31, 2012 Loan	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2013 Loan
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Change in loss reserves					$ (42,637,000)	[1]	$ (5,850,000)	[1]
Increase in accrual for probable rescission related settlements					20,000,000
Historical average period for uncured default to develop into paid claim					12 months
Premium refund liability, expected claim payments	127,000,000				127,000,000							131,000,000
Primary Default Inventory [Roll Forward]
Default inventory at the beginning of period	91,842		126,610		103,328		139,845
New Notices	21,178		25,425		44,524		53,289
Cures	(21,182)		(25,450)		(48,500)		(56,572)
Paids (including those charged to a deductible or captive)	(6,068)		(9,051)		(13,132)		(18,496)
Rescissions and denials	(354)		(429)		(804)		(961)
Default inventory at end of period	85,416		117,105		85,416		117,105		139,845
Pool insurance notice inventory [Abstract]
Pool insurance notice inventory (in number of loans)	5,271		7,006		5,271		7,006					6,563
Aging of the Primary Default Inventory [Abstract]
3 months or less	15,297		18,760		15,297		18,760					18,941
3 months or less (in hundredths)	18.00%		16.00%		18.00%		16.00%					18.00%
4 - 11 months	19,362		26,377		19,362		26,377					24,514
4 - 11 months (in hundredths)	23.00%		23.00%		23.00%		23.00%					24.00%
12 months or more	50,757		71,968		50,757		71,968					59,873
12 months or more (in hundredths)	59.00%		61.00%		59.00%		61.00%					58.00%
Total primary default inventory	85,416		117,105		85,416		117,105		139,845
Total primary default inventory (in hundredths)	100.00%		100.00%		100.00%		100.00%					100.00%
Primary claims received inventory included in ending default inventory	5,398	[2]	10,637	[2]	5,398	[2]	10,637	[2]				6,948	[2]
Primary claims received inventory included in ending default inventory (in hundredths)	6.00%	[2]	9.00%	[2]	6.00%	[2]	9.00%	[2]				7.00%	[2]
Number of rescindable loans affected by Company's decision to voluntarily suspend rescissions	1,558				1,558
Number of payments delinquent [Abstract]
3 payments or less	22,867		27,498		22,867		27,498					28,095
3 payments or less (in hundredths)	27.00%		24.00%		27.00%		24.00%					27.00%
4 - 11 payments	19,666		27,299		19,666		27,299					24,605
4 - 11 payments (in hundredths)	23.00%		23.00%		23.00%		23.00%					24.00%
12 payments or more	42,883		62,308		42,883		62,308					50,628
12 payments or more (in hundredths)	50.00%		53.00%		50.00%		53.00%					49.00%
Total primary default inventory	85,416		117,105		85,416		117,105		139,845
Total primary default inventory (in hundredths)	100.00%		100.00%		100.00%		100.00%					100.00%
Estimated Rescission Reduction - Loss Reserve [Roll Forward]
Estimated rescission reduction - losses incurred									(200,000,000)	200,000,000	2,500,000,000
Premium refund liability, expected future rescissions	13,000,000				13,000,000							15,000,000
Increase (Decrease) in Estimated Claim Rate On primary Defaults [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Change in loss reserves					(25,000,000)	[1]	0	[1]
Percentage of prior year default inventory resolved (in hundredths)					40.00%		37.00%
Increase (Decrease) in Estimated Severity, Primary Defaults [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Change in loss reserves					(8,000,000)	[1]	1,000,000	[1]
Change In Estimates Related to Pool Reserves, LAE Reserves and Reinsurance [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Change in loss reserves					$ (10,000,000)	[1]	$ (7,000,000)	[1]

[1] A negative number for prior year loss development indicates a redundancy of prior year loss reserves, and a positive number indicates a deficiency of prior year loss reserves.

[2] Our claims received inventory includes suspended rescissions, as we have voluntarily suspended rescissions of coverage related to certain loans that we believed would be included in a potential resolution. As of June 30, 2014, rescissions of coverage on approximately 1,558 loans had been voluntarily suspended.