Subsequent Event (Details) (USD $)	0 Months Ended	12 Months Ended			0 Months Ended	1 Months Ended
	Oct. 25, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jan. 24, 2014 Subsequent Event	Jan. 31, 2014 Subsequent Event
Subsequent Event [Line Items]
Proceeds from Possessory Interest						$ 25,000,000
Proceeds from Personal Property						5,000,000
Dividends Payable, Date Declared					Jan. 24, 2014
Common Stock, Dividends, Per Share, Declared	$ 2.50	$ 2.90	$ 0.28	$ 0.16	$ 1.50
Dividends Payable		$ 2,192,000	$ 2,053,000		$ 30,500,000
Dividends Payable, Date of Record					Feb. 07, 2014
Dividends Payable, Date to be Paid					Feb. 14, 2014