Premium Deficiency Reserve (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Premium Deficiency Reserve [Abstract]
Present value of expected future paid losses and expenses, net of expected future premium	$ (570,000,000)		$ (709,000,000)		$ (570,000,000)		$ (709,000,000)		$ (669,000,000)
Established loss reserves	541,000,000		652,000,000		541,000,000		652,000,000		621,000,000
Net deficiency	(28,711,000)		(57,000,000)		(28,711,000)		(57,000,000)
Change in premium deficiency reserve	6,000,000		4,000,000		19,000,000		17,000,000
Premium Deficiency Reserve [Roll Forward]
Premium Deficiency Reserve at beginning of period	(35,000,000)		(61,000,000)		(48,461,000)		(74,000,000)
Paid claims and loss adjustment expenses	41,000,000		51,000,000		132,000,000		172,000,000
Decrease in loss reserves	(15,000,000)		(37,000,000)		(81,000,000)		(114,000,000)
Premium earned	(17,000,000)		(24,000,000)		(59,000,000)		(72,000,000)
Effects of present valuing on future premiums, losses and expenses	3,000,000		0		(1,000,000)		(2,000,000)
Change in premium deficiency reserve to reflect actual premium, losses and expenses recognized	12,000,000		(10,000,000)		(9,000,000)		(16,000,000)
Change in premium deficiency reserve to reflect change in assumptions relating to future premiums, losses expenses and discount rate	(6,000,000)	[1]	14,000,000	[1]	28,000,000	[1]	33,000,000	[1]
Premium Deficiency Reserve at end of period	$ (28,711,000)		$ (57,000,000)		$ (28,711,000)		$ (57,000,000)

[1] A (negative) positive number for changes in assumptions relating to premiums, losses, expenses and discount rate indicates a (deficiency) redundancy of the prior premium deficiency reserve.