Annual report pursuant to Section 13 and 15(d)

Earnings Per Share (Details Textual)

v2.4.0.6
Earnings Per Share (Details Textual)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Earnings per Share (Textual) [Abstract]      
Common stock equivalents 419,752,000 689,922,000 3,381,905,000