Investments Additional Information (Details) (USD $)	3 Months Ended		9 Months Ended									9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 U.S. Treasury securities security	Dec. 31, 2013 U.S. Treasury securities	Sep. 30, 2014 Corporate debt securities	Dec. 31, 2013 Corporate debt securities	Sep. 30, 2014 Securities of any one issuer (excluding the U.S. Government)	Oct. 31, 2014 Securities of any one issuer (excluding the U.S. Government) Subsequent event	Sep. 30, 2014 Required percent of investment account held in cash or cash equivalents Minimum	Sep. 30, 2014 Other aggregated investments Minimum Securities of any one issuer (excluding the U.S. Government)	Sep. 30, 2014 Other aggregated investments Maximum Securities of any one issuer (excluding the U.S. Government)	Sep. 30, 2014 Investor Fairholme Capital Management, L.L.C.
Schedule of Available-for-sale Securities [Line Items]
Common stock ownership percentage															27.10%
Investments, target portfolio allocations												50.00%		15.00%
Investments, portfolio allocations requiring additional consent													10.00%	15.00%
Money market funds	$ 46,200,000		$ 46,200,000
Debt securities	582,290,000		582,290,000			484,900,000		97,400,000
Preferred stock	13,724,000		13,724,000
Available For Sale Securities, Preferred Stock, One Issuer										10,200,000	23,700,000
Realized losses from the sale of available-for-sale securities			800,000
Realized gains from the sale of available-for-sale securities		100,000		100,000
Sales of investments	75,000,000	7,700,000	83,239,000	7,725,000
Maturities of investments	40,000,000	25,000,000	100,000,000	25,000,000
Number of securities with net unrealized losses						0
Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value								12,500,000
Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, accumulated loss								1,200,000
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value								84,900,000	22,000,000
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, accumulated loss								3,900,000	2,200,000
Other than temporary impairment losses, investments, available-for-sale securities	5,100,000
Other-than-temporary impairment losses	1,295,000	0	1,295,000	0
Other than temporary impairment losses, investments, portion in other comprehensive loss, before tax, including portion attributable to noncontrolling interest, available-for-sale securities	3,800,000
Gross unrealized losses	$ 3,826,000		$ 3,826,000		$ 2,213,000	$ 0	$ 0	$ 3,826,000	$ 2,213,000