Share-Based Compensation - Summary of Share-Based Compensation Expense Related to Share-Based Awards (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation expense	$ 11,653	$ 7,411	$ 6,253
Tax benefit	(3,363)	(2,040)	(1,545)
Net decrease in net income	8,290	5,371	4,708
Cost of software services, maintenance and subscriptions [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation expense	1,509	1,084	871
Selling, general and administrative expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation expense	$ 10,144	$ 6,327	$ 5,382