Condensed Consolidated Financial Statements - Components of Other Current Assets and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Other Current Assets and Liabilities [Line Items]
Other	$ 8,222	$ 5,781
Total other current assets	29,010	58,126
Settlement payables	20,245	48,953
Accrued interest	2,554	7,291
Vendor financed licenses	3,068	1,862
Royalties payable	9,883	9,264
Other	28,562	35,534
Total other current liabilities	64,312	102,904
Settlement deposits [Member]
Other Current Assets and Liabilities [Line Items]
Other assets settlement	8,905	22,282
Settlement receivables [Member]
Other Current Assets and Liabilities [Line Items]
Other assets settlement	$ 11,883	$ 30,063