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Related Party Transactions - Additional Information (Detail) (USD $) | 12 Months Ended |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended | 6 Months Ended
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Sep. 30, 2010 | Jun. 30, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 Software packages | Dec. 31, 2012 Software packages Current Asset | Dec. 31, 2011 Software packages Current Asset | Dec. 31, 2012 Software packages Noncurrent Assets | Dec. 31, 2011 Software packages Noncurrent Assets | Dec. 31, 2012 Consulting Agreement | Jun. 30, 2013 Apollo | Jun. 30, 2013 Popular
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Termination fee |  |  |  |  |  |  |  |  |  |  | $ 8,500,000 | $ 8,200,000
Letter of credit issued by Popular |  | 3,600,000 | 2,900,000 |  |  |  |  |  |  |  |  |
Reimbursable expenses and annual management fee |  |  |  |  |  |  |  |  |  | 2,000,000 |  |
Reimbursable expenses and annual management fee as percentage of EBITDA |  |  |  |  |  |  |  |  |  | 2.00% |  |
Expected reimbursement asset recorded on merger date | 5,600,000 |  |  |  | 11,200,000 |  |  |  |  |  |  |
Expected reimbursement asset, period | 17 months |  |  |  | 5 years |  |  |  |  |  |  |
Unfavorable contract liability at fair value | 10,100,000 |  |  |  |  |  |  |  |  |  |  |
Software costs reimbursement, Carrying Amount |  | $ 4,540,000 | $ 6,099,000 | $ 7,113,000 |  | $ 2,200,000 | $ 2,200,000 | $ 3,900,000 | $ 5,200,000 |  |  |

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