Goodwill and Other Intangible Assets Data - Changes in Net Carrying Value of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012 Laserband LLC [Member]	Dec. 31, 2013 Hart Systems LLC [Member]
Goodwill [Line Items]
Beginning balance	$ 79,703		$ 155,800
Acquisition				24,353	60,858
Goodwill at gross cost		180,731
Impairment charge	(9,114)	(101,028)
Ending balance	$ 94,942	$ 79,703	$ 155,800