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COMMITMENTS AND CONTINGENCIES - Deferred FI Implementation Costs (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Deferred Financial Institution Costs [Roll Forward] |  |  |  |
Beginning balance | $ 12,181 | $ 12,425 | $ 15,877 | $ 13,625
Deferred costs | 0 | 3,500 | 0 | 5,750
Recoveries through FI Share | 1,157 | 1,344 | (3,469) | (4,036)
Amortization | 789 | 378 | 2,173 | 1,136
Ending balance | $ 10,235 | $ 14,203 | $ 10,235 | $ 14,203

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- Definition Contract with Customer, Asset, Deferred Financial Institution Implementation Costs Recoveries Through Financial Institution Share, Net + References No definition available. + Details
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- Definition Deferred Financial Institution Costs [Roll Forward] + References No definition available. + Details
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