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Issuance Of Preferred Stock And Warrant - Additional Information (Detail) (USD $)
 0 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Sep. 17, 2010
May 28, 2010
May 31, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2009
Sep. 30, 2009
Dec. 31, 2012
Sep. 17, 2010
Replacement Warrant
May 28, 2010
Private Placement [Member]
Jul. 31, 2009
Series E Redeemable Preferred Stock
Trailer Investments
Jul. 31, 2009
Series F Redeemable Preferred Stock
Trailer Investments
Jul. 31, 2009
Series G Redeemable Preferred Stock
Trailer Investments
Jul. 31, 2009
Redeemable Convertible Preferred Stock
Trailer Investments
Dec. 31, 2012
Warrant
Trailer Investments
May 31, 2010
E G Preferred Stock
May 31, 2010
Series E Preferred Stock [Member]
Dec. 31, 2011
Series E Preferred Stock [Member]
May 31, 2010
Series F Preferred Stock [Member]
Dec. 31, 2011
Series F Preferred Stock [Member]
May 31, 2010
Series G Preferred Stock [Member]
Dec. 31, 2011
Series G Preferred Stock [Member]
Public offering (in shares)                   16,137,500 20,000 5,000 10,000                  
Stock issued during period value issued for services                           $ 35,000,000                
Class of warrant or right exercise price of warrants or rights                 $ 6.75           $ 0.01              
Stock Issued During Period, Shares, Conversion of Convertible Securities               24,762,636 9,349,032                          
Percentage of issued and outstanding common stock subject to upward adjustment to be maintain after exercise of option               44.21%                            
Percentage of issued and outstanding common stock subject to upward adjustment to be maintain after exercise of warrant               49.99%                            
Operating loss carry forwards limitations on use               Lose its ability to utilize its net operating loss carryforwards, including as a result of a stockholder of the Company acquiring greater than 5% of the outstanding common stock of the Company.                            
Preferred stock, redemption price per share                               $ 1,000            
Payments for repurchase of redeemable preferred stock                               35,000,000            
Preferred stock accrued dividends and premium adjustment percentage                               20.00%            
Preferred stock, dividend rate, percentage                                 15.00%   16.00%   18.00%  
Dividends, Preferred Stock       1,300,000 2,000,000 2,200,000 1,100,000                 4,800,000   1,328,000   355,000   808,000
Preferred stock redemption premium     8,000,000                                      
Preferred stock, amount of preferred dividends in arrears                               47,800,000            
Business acquisition, percentage of voting interests acquired               50.00%                            
Business acquisition, contingent consideration, potential cash payment               $ 74,600,000                            
Warrant increased by fixed number in lieu of market price anti dilution adjustment   750,000                                        
Forfeiture of common stock shares under warrant   22,812                                        
Class of warrant or right, number of securities called by warrants or rights                 9,349,032                          
Stock forfeiture during period shares conversion of convertible securities                 13,549                          
Percentage of ownership hold by affiliates beneficially 10.00%