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Commitments and Contingencies - Legal Matters (Details Textual) (USD $)
 0 Months Ended 3 Months Ended
Jan. 14, 2013
Feb. 15, 2012
Mar. 31, 2013
Dec. 31, 2012
Oct. 12, 2012
Commitments and Contingencies - Legal Matters (Textual) [Abstract]          
Company's stock worth   $ 20,500      
Plaintiffs' legal costs   106,000      
Liability for amount completely withdrawn from the Unions Pension Trust Fund         5,300,000
Plaintiffs claim to have suffered property damages and other loss     75,000,000    
Loss contingency reserve accrual     0    
Reserves for Amount withdrawn from the Union's Pension Trust Fund       0  
Accruals For Estimated Losses     0    
Assessment regarding Loss contingency impact Description     We are not aware of pending claims or assessments, other than as described above, which may have a material adverse impact on our liquidity, financial position, or results of operations.    
Loss contingency damages sought value from third plaintiffs 5,000,000        
Loss contingency damages sought value from two plaintiffs 1,000,000        
Reserve recorded under loss contingency     $ 0