Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended					6 Months Ended			12 Months Ended
	Jun. 30, 2013 Segment	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012		Jun. 30, 2013	Jun. 30, 2012		Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Line Items]
Gross amount of goodwill		$ 72,400,000							$ 72,400,000
Accumulated goodwill impairment		27,100,000							27,100,000
Goodwill acquired during the period									12,958,000
Adjusted goodwill in connection with its acquisition									300,000
Goodwill Impaired Accumulated Impairment Loss During Year		700,000	5,000,000	21,400,000
Percentage of discount rate		50.00%							50.00%
Impairment of long-lived assets			900,000	23,915,000	[1]		23,915,000	[1]	24,800,000
Indefinite lived intangible assets, impairment						11,000,000
Number of operating units	6
Identity Management
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill acquired during the period									$ 12,958,000
Number of operating units	4					4
ID Products
Goodwill And Intangible Assets Disclosure [Line Items]
Number of operating units	2					2
Minimum
Goodwill And Intangible Assets Disclosure [Line Items]
Percentage of discount rate		16.00%							16.00%
Maximum
Goodwill And Intangible Assets Disclosure [Line Items]
Percentage of discount rate		20.00%							20.00%

[1] Certain amounts shown in the table above have changed as compared to amounts reported in prior periods as noted in Item 1, Financial Statements, Note 1 of Notes to Condensed Consolidated Financial Statements, Reclassifications and Restatements, for more details.