Revenues in Condensed Consolidated Statements of Operations from Arrangements for which Vendor-Specific Objective Evidence of Fair Value Does Not Exist for Each Undelivered Element (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenue Recognition, Milestone Method [Line Items]
Software license fees	$ 35,702	$ 41,356
Maintenance fees	62,499	58,634
Services	22,588	23,929
Total revenues	221,473	161,997
Vendor Specific Objective Evidence of Fair Value
Revenue Recognition, Milestone Method [Line Items]
Software license fees	6,856	5,801
Maintenance fees	2,216	2,321
Services	8	3
Total revenues	$ 9,080	$ 8,125