Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended			9 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Mar. 31, 2013 Segment	Sep. 30, 2014 Segment	Sep. 30, 2013	Dec. 31, 2013 Segment
Goodwill And Intangible Assets Disclosure [Line Items]
Number of operating units				4		6
Number of segments			4	4
Goodwill impaired accumulated impairment loss during year	$ 4,700,000	$ 22,600,000				$ 27,300,000
Impairment of long-lived assets		178,000			178,000
Continuing Operations
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill impaired accumulated impairment loss during year						15,600,000
Discontinued Operations
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill impaired accumulated impairment loss during year						11,700,000
Identity Management
Goodwill And Intangible Assets Disclosure [Line Items]
Number of operating units						4
ID Products
Goodwill And Intangible Assets Disclosure [Line Items]
Number of operating units						2
Sold | Identity Management | Identity Management Id Solutions And Payment Solution
Goodwill And Intangible Assets Disclosure [Line Items]
Number of operating units						2
Order Backlog
Goodwill And Intangible Assets Disclosure [Line Items]
Impairment of long-lived assets						200,000
Indefinite lived intangible assets, impairment				$ 9,100,000