Consolidated Statement of Stockholders' Equity (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Special Dividend
Dividend on common stock, per share	$ 6.66		$ 6.66
Regular Dividend
Dividend on common stock, per share	$ 0.48	$ 0.20	$ 1.01	$ 0.20