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Long-Term Debt (Details Textual) (USD $)
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Senior Secured Notes [Member]
Jun. 30, 2011
Senior Secured Notes [Member]
Jun. 30, 2012
Senior Secured Notes [Member]
Jun. 30, 2011
Senior Secured Credit Note [Member]
Jun. 30, 2012
Senior Secured Credit Note [Member]
Jun. 30, 2011
Senior Secured Credit Note [Member]
Jun. 30, 2011
Subordinated Note [Member]
Jun. 30, 2012
Subordinated Note [Member]
Jun. 30, 2011
Subordinated Note [Member]
Long-Term Debt (Textual) [Abstract]                        
Proceeds from the private placement           $ 200,000,000            
Interest rate       8.75%   8.75%            
Retirement of notes               22,400,000        
Subordinated note repayment     100,000,000               100,000,000  
Cost to issue the Notes     (4,346,000)   4,600,000              
Unamortized debt issuance costs             344,000          
Effective portion of the net loss                   1,300,000    
Repurchase of notes   5,000,000                    
Repurchase of notes at cost   4,700,000                    
Gain on repurchase notes   300,000                    
Interest expense on note 3,800,000   3,800,000 4,300,000   8,500,000 35,000   306,000 185,000   1,600,000
Issued a note               125,000,000        
Term of Senior Secured Credit Note               7 years        
Remaining principal balance of note               22,400,000        
Proceeds from issuance of Subordinated Note                     $ 100,000,000  
Long-Term Debt (Additional Textual) [Abstract]                        
Date of retirement   Apr. 12, 2011                    
Term of payments of interest on notes   semi-annually