XML 32 R109.htm IDEA: XBRL DOCUMENT v2.4.0.6
Earnings Per Share Treasury Share Buyback (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Earnings Per Share [Abstract]        
Shares which exclude consideration of stock options in calculation of diluted shares outstanding   865,844 226,897 453,700
Treasury stock, shares 10,000,000      
Treasury stock, value   $ (101,697) $ (29,930)  
Weighted average number diluted shares outstanding adjustment   5,600,000