The Company and Summary of Significant Accounting Policies - Additional Information (Detail)				12 Months Ended
	Dec. 13, 2013 shares	Sep. 18, 2013 shares	Apr. 17, 2013 $ / shares shares	Dec. 31, 2017 USD ($) country $ / shares shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Company And Summary Of Significant Accounting Policies [Line Items]
Number of countries where services are provided | country				26
Offering price (in usd per share) | $ / shares				$ 0.01
Interest cost capitalized | $				$ 800,000	$ 400,000	$ 300,000
Impairment losses | $				$ 0	$ 0	$ 0
Software and Maintenance Contracts | Minimum
Company And Summary Of Significant Accounting Policies [Line Items]
Intangible asset useful life				1 year
Software and Maintenance Contracts | Maximum
Company And Summary Of Significant Accounting Policies [Line Items]
Intangible asset useful life				5 years
Software Development | Minimum
Company And Summary Of Significant Accounting Policies [Line Items]
Intangible asset useful life				3 years
Software Development | Maximum
Company And Summary Of Significant Accounting Policies [Line Items]
Intangible asset useful life				10 years
Selling Stockholders
Company And Summary Of Significant Accounting Policies [Line Items]
Shares issued under public offerings (in shares)	15,233,273	23,000,000
Popular
Company And Summary Of Significant Accounting Policies [Line Items]
Shares issued under public offerings (in shares)				11,654,803
Percentage of equity interest owned				16.10%
Apollo Global Management LLC
Company And Summary Of Significant Accounting Policies [Line Items]
Shares issued under public offerings (in shares)				0
IPO | Common Stock
Company And Summary Of Significant Accounting Policies [Line Items]
Shares issued under public offerings (in shares)			28,789,943
Offering price (in usd per share) | $ / shares			$ 20.00