Stock Compensation Plans (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Series B Preferred Stock [Member]
Dec. 31, 2012
Series B Preferred Stock [Member]
Dec. 31, 2011
Series B Preferred Stock [Member]
Jul. 22, 2011
Common Stock [Member]
Dec. 31, 2013
Common Stock [Member]
Dec. 31, 2012
Common Stock [Member]
Dec. 31, 2011
Common Stock [Member]
Dec. 31, 2013
Restricted Stock And Share Unit [Member]
Dec. 31, 2012
Restricted Stock And Share Unit [Member]
Dec. 31, 2013
2011 Long Term Incentive And Equity Award Plan [Member]
Sep. 26, 2011
2011 Long Term Incentive And Equity Award Plan [Member]
Mar. 01, 2010
Second Union Employee Option Plan [Member]
Stock Options [Member]
Jul. 22, 2011
Teamster National 401K Savings Plan [Member]
Series B Preferred Stock [Member]
Sep. 16, 2011
Teamster National 401K Savings Plan [Member]
Common Stock [Member]
Jul. 22, 2011
Teamster National 401K Savings Plan [Member]
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Shares reserved for issuance                         1,100,000 2,000,000        
Shares authorized                             31,000      
Exercise price per share   $ 0.00 $ 0.00                       $ 3,600.00      
Expiration period                             10 years      
Recognized compensation expense $ 5.8 $ 3.8 $ 15.5                              
Unrecognized compensation expense                     4.8 6.4            
Period of recognition                     2 years 1 month 17 days              
Shares delivered into escrow                               1,300,000    
Fair value of shares delivered into escrow                               $ 14.9    
Common stock shares converted from preferred       0 0 5,000,000 4,600,000 0 0 6,210,000             1,600,000 1,600,000