Long-Term Debt (GO Zone Act Senior Notes Due 2035) (Details) (USD $) In Thousands, unless otherwise specified				12 Months Ended		1 Months Ended				1 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 GO Zone 6 1/2% Tax-Exempt Revenue Bonds Due 2035 [Member]	Dec. 31, 2012 GO Zone 6 1/2% Tax-Exempt Revenue Bonds Due 2035 [Member]	Dec. 31, 2013 GO Zone 6 1/2% Tax-Exempt Revenue Bonds Due 2035 [Member] Redeemed Prior To November 1, 2020 [Member]	Dec. 31, 2013 GO Zone 6 1/2% Tax-Exempt Revenue Bonds Due 2035 [Member] Redeemed On Or After November 1, 2020 [Member]	Jul. 31, 2010 Gulf Opportunity Zone Act Of 2005 [Member]	Dec. 31, 2007 Gulf Opportunity Zone Act Of 2005 [Member]	Jul. 02, 2010 Gulf Opportunity Zone Act Of 2005 [Member]	Dec. 13, 2007 Gulf Opportunity Zone Act Of 2005 [Member]	Dec. 31, 2010 Gulf Opportunity Zone Act Of 2005 [Member] GO Zone 6 1/2% Tax-Exempt Revenue Bonds Due 2035 [Member]	Dec. 02, 2010 Gulf Opportunity Zone Act Of 2005 [Member] GO Zone 6 1/2% Tax-Exempt Revenue Bonds Due 2035 [Member]
Debt Instrument [Line Items]
Senior notes, principal amount issued								$ 100,000	$ 250,000		$ 89,000
Stated interest rate	6.50%	6.50%	6.50%							6.50%
Maturity date						Aug. 01, 2029	Nov. 01, 2032			Nov. 01, 2035
Percentage of principal required if called				100.00%	100.00%
Minimum debt amount guaranteed by subsidiaries		$ 5,000