Nature of Business and Summary of Significant Accounting Policies - Components of Other Current Assets and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Other	$ 8,755	$ 8,319
Total other current assets	33,578	21,637
Settlement payables	24,016	11,250
Accrued interest	7,356	7,501
Vendor financed licenses	9,213	15,723
Royalties payable	7,197	4,910
Other	31,059	35,841
Total other current liabilities	78,841	75,225
Settlement deposits [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Other assets settlement	10,496	5,357
Settlement receivables [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Other assets settlement	$ 14,327	$ 7,961