Basis of Presentation and Significant Accounting Policies (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended
	Oct. 31, 2012	Sep. 30, 2012
Basis of Presentation and Significant Accounting Policies (Textual) [Abstract]
Special cash dividend per share		$ 10.00
Special cash dividend payable		$ 88.8
Date of special cash dividend payable		Oct. 19, 2012
Date of record for special cash dividend payable	Nov. 30, 2012	Sep. 28, 2012