Quarterly report pursuant to sections 13 or 15(d)

Earnings Per Share (Details Textual)

v2.4.0.6
Earnings Per Share (Details Textual)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Unvested restricted stock [Member]
   
Earnings Per Share (Textual) [Abstract]    
Shares with anti-dilutive effect 0.4 0.9
Vested stock options [Member]
   
Earnings Per Share (Textual) [Abstract]    
Shares with anti-dilutive effect 1.0