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Nature of Business and Summary of Significant Accounting Policies - Components of Other Current Assets and Other Current Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Other Current Assets and Liabilities [Line Items] |  |
Other | $ 7,574 | $ 5,781
Total other current assets | 39,830 | 58,126
Settlement payables | 31,605 | 48,953
Accrued interest | 8,407 | 7,291
Vendor financed licenses | 3,551 | 1,862
Royalties payable | 11,318 | 9,264
Other | 33,173 | 35,534
Total other current liabilities | 88,054 | 102,904
Settlement deposits [Member] |  |
Other Current Assets and Liabilities [Line Items] |  |
Other assets settlement | 23,651 | 22,282
Settlement receivables [Member] |  |
Other Current Assets and Liabilities [Line Items] |  |
Other assets settlement | $ 8,605 | $ 30,063

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