Goodwill by Segment and Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2012		Dec. 31, 2011
Goodwill [Line Items]
Beginning Balance		$ 58,404	[1]	$ 47,126
Goodwill acquired during the period		12,958		10,518
Goodwill measurement period adjustment				118
Goodwill impaired during the period	(21,450)	(21,450)
Currency translation adjustment		(962)		642
Ending Balance	48,950	48,950		58,404	[1]
Identity Management
Goodwill [Line Items]
Beginning Balance		48,838		37,955
Goodwill acquired during the period		12,958		10,518
Goodwill impaired during the period		(15,613)
Currency translation adjustment		(943)		365
Ending Balance	45,240	45,240		48,838
ID Products
Goodwill [Line Items]
Beginning Balance		9,566		9,171
Goodwill measurement period adjustment				118
Goodwill impaired during the period		(5,837)
Currency translation adjustment		(19)		277
Ending Balance	$ 3,710	$ 3,710		$ 9,566

[1] The condensed consolidated balance sheet has been derived from the audited consolidated financial statements at December 31, 2011 but does not include all the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.