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Share-Based Compensation - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Jul. 01, 2013
NetSpend Holdings Inc
Sep. 30, 2013
Performance Share Plan Twenty Thirteen
Sep. 30, 2013
Performance Share Plan Twenty Thirteen
Minimum
Sep. 30, 2013
Performance Share Plan Twenty Thirteen
Maximum
Sep. 30, 2012
Performance Share Plan 2012
Sep. 30, 2012
Performance Share Plan 2012
Minimum
Sep. 30, 2012
Performance Share Plan 2012
Maximum
Sep. 30, 2013
Replacement Awards
NetSpend Holdings Inc
Sep. 30, 2013
Unvested Restricted Awards
Sep. 30, 2012
Unvested Restricted Awards
Sep. 30, 2013
Unvested Restricted Awards
Certain key Employees
Sep. 30, 2012
Unvested Restricted Awards
Certain key Employees
Jul. 18, 2013
Unvested Restricted Awards
Retention Shares
NetSpend Holdings Inc
Jul. 18, 2013
Unvested Restricted Awards
Retention Shares
NetSpend Holdings Inc
Minimum
Certain key Employees
Jul. 18, 2013
Unvested Restricted Awards
Retention Shares
NetSpend Holdings Inc
Maximum
Certain key Employees
Sep. 30, 2013
Stock Options
Sep. 30, 2012
Stock Options
Jul. 18, 2013
Stock Options
Replacement Awards
NetSpend Holdings Inc
Sep. 30, 2013
Stock Options
Replacement Awards
NetSpend Holdings Inc
Sep. 30, 2013
Stock Options
Replacement Awards
NetSpend Holdings Inc
Minimum
Sep. 30, 2013
Stock Options
Replacement Awards
NetSpend Holdings Inc
Maximum
Jul. 01, 2013
Unvested Stock Awards
Replacement Awards
NetSpend Holdings Inc
Sep. 30, 2013
Performance Share Plan
Replacement Awards
NetSpend Holdings Inc
Sep. 30, 2013
Performance Share Plan
2013 NetSpend Retention Performance Shares
NetSpend Holdings Inc
Sep. 30, 2013
Performance Share Plan
2013 NetSpend Retention Performance Shares
NetSpend Holdings Inc
Minimum
Sep. 30, 2013
Performance Share Plan
2013 NetSpend Retention Performance Shares
NetSpend Holdings Inc
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                            
Share-based compensation $ 9,800,000 $ 3,700,000 $ 19,587,000 $ 12,348,000                                                    
Shares of common stock issued         2,017,865             2,000,000 575,299 342,074     212,694           1,060,148     870,361 87,356 225,000    
Value of awards issued                       37,400,000 14,000,000 7,400,000     5,500,000           13,700,000     21,500,000        
Stock bonus awards vesting period                             3 years 3 years   4 years 2 years                      
Unrecognized compensation cost related to non vested share-based compensation arrangements                         $ 34,500,000             $ 7,700,000                    
Unrecognized compensation cost related to non vested share-based compensation arrangements, remaining weighted average recognition period                         2 years 4 months 24 days             1 year 7 months 6 days                    
Authorized shares of nonvested stock to key executives           237,679     241,095                                          
Percentage of performance shares grant expected to vest           200.00%     200.00%                                   100.00% 100.00%    
Performance shares grant expected vesting Period             2013 2015   2012 2014                                   2013 2015
Number of options granted                                       879,613 818,090                  
Average fair value of option grant                                       $ 5.32 $ 5.27   $ 12.93              
Exercise price                                       $ 24.35 $ 22.95 $ 11.68                
Risk-free interest rate                                       1.31% 1.69% 1.31%                
Expected volatility                                       23.90% 24.11% 29.22%                
Expected term                                       7 years 6 months 7 years 10 months 24 days 4 years 8 months 12 days                
Dividend yield                                       1.65% 1.75% 1.63%                
Grant vesting period                                       3 years 3 years     7 months 45 months