Subsequent Event (Details) (Common Stock [Member], Subsequent Event [Member])	0 Months Ended
	Feb. 11, 2013
Common Stock [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2
Stockholders' Equity Note, Stock Split	Each shareholder of record of the Common Stock on the close of business on March 6, 2013 will be entitled to receive one additional share of Common Stock for every outstanding share held on the record date. The distribution of the new shares will occur on March 20, 2013 and trading will begin on a split-adjusted basis on March 21, 2013.