Significant Accounting Policies and Basis of Presentation (Details Textual)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Significant Accounting Policies [Line Items]      
Policy For Maximum Maturity Days Of Investments Considered As Cash Equivalents 90 days    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 38.2 35.0 24.5