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Commitments and Contingencies (Details) (USD $)
Share data in Millions, unless otherwise specified
 0 Months Ended 3 Months Ended 6 Months Ended
Jan. 27, 2012
Apr. 12, 2011
Jun. 30, 2013
Mar. 31, 2012
Jun. 30, 2013
Dec. 31, 2012
Apr. 27, 2011
Commitments and Contingencies (Additional Textual) [Abstract]              
Claims for breaches of fiduciary duty and unjust enrichment $ 3,600,000            
Share identified as demandable   3.0          
Cash payment to receive a complete release of claims             20,000,000
Charge related to unexchanged merger shares contingency       3,000,000      
Cost to the Company in excess of the amount accrued         27,200,000    
Charge in general and administrative expenses     8,000   14,000    
Future minimum lease payments under operating leases     19,500,000   19,500,000    
Future minimum lease payments under operating leases due in 2013     2,748,000   2,748,000    
Future minimum lease payments under operating leases due in 2014     3,407,000   3,407,000    
Future minimum lease payments under operating leases due in 2015     3,004,000   3,004,000    
Future minimum lease payments under operating leases due in 2016     2,547,000   2,547,000    
Future minimum lease payments under operating leases due in 2017     2,175,000   2,175,000    
Future minimum lease payments under operating leases due thereafter     5,662,000   5,662,000    
Local deals and getaway merchant payables     $ 22,400,000   $ 22,400,000 $ 23,400,000  
Putative class action lawsuits
              
Commitments and Contingencies (Textual) [Abstract]              
Number of putative class action lawsuits         2    
Shareholder derivative lawsuits
              
Commitments and Contingencies (Textual) [Abstract]              
Number of putative class action lawsuits         5