Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity (Details Textual)

Shareholders' Equity (Details Textual) (USD $)
Share data in Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Shareholders' Equity (Textual) [Abstract]  
Common stock reserved 6.5
Effective income tax rate 35.00%
Income tax effect recorded for currency translation adjustments $ 0
Common Class B Stock
Class of Stock [Line Items]  
Class B Stock Voting Rights Per Share 10 votes per share