Condensed Consolidated Financial Statements - Components of Other Current Assets and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Other Current Assets and Liabilities [Line Items]
Other	$ 6,697	$ 5,781
Total other current assets	21,488	58,126
Settlement payables	14,365	48,953
Accrued interest	7,284	7,291
Vendor financed licenses	2,089	1,862
Royalties payable	7,385	9,264
Other	27,492	35,534
Total other current liabilities	58,615	102,904
Settlement deposits [Member]
Other Current Assets and Liabilities [Line Items]
Other assets settlement	5,685	22,282
Settlement receivables [Member]
Other Current Assets and Liabilities [Line Items]
Other assets settlement	$ 9,106	$ 30,063