Goodwill and Other Intangible Assets - Summary of the Gross Amount and Accumulated Impairment Losses of Goodwill (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Carrying value	$ 45,968	$ 45,968	$ 48,900
Operating Segments | Technology
Goodwill [Line Items]
Gross amount	156,391	156,391	156,391
Accumulated impairment losses	(139,357)	(139,357)	(139,357)
Carrying value	17,034	17,034	17,034
Operating Segments | Finance and Accounting
Goodwill [Line Items]
Gross amount	19,766	19,766	19,766
Accumulated impairment losses	(11,760)	(11,760)	(11,760)
Carrying value	8,006	8,006	8,006
Operating Segments | Government Solutions
Goodwill [Line Items]
Gross amount	104,596	104,596	102,641
Accumulated impairment losses	(83,668)	(83,668)	(83,668)
Carrying value	$ 20,928	$ 20,928	$ 18,973