Investments - Additional Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended					12 Months Ended	0 Months Ended	12 Months Ended		0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 U.S. treasury securities security	Dec. 31, 2013 Corporate debt securities	Dec. 31, 2013 Cash, investment grade cash equivalents or U.S. treasury securities Minimum	Feb. 21, 2014 Cash, investment grade cash equivalents or U.S. treasury securities Minimum Subsequent Event	Dec. 31, 2013 Corporate debt securities Maximum	Dec. 31, 2013 Other aggregated investments Securities of any one issuer (excluding the U.S. Government) Maximum	Feb. 21, 2014 Other aggregated investments Securities of any one issuer (excluding the U.S. Government) Maximum Subsequent Event	Dec. 31, 2013 Investor Fairholme Capital Management, L.L.C.
Schedule of Available-for-sale Securities [Line Items]
Common stock ownership percentage											27.00%
Investments, target portfolio allocations						50.00%	50.00%	50.00%	10.00%	10.00%
Number of securities with net unrealized losses				0
Debt securities	$ 146,972			$ 124,949	$ 22,023
Gross unrealized losses	2,213			0	2,213
Gain on sales and maturities of investments	93	0	0
Sales of investments	7,725	0	0
Maturities of investments	$ 100,000	$ 0	$ 0