Discontinued Operations (Narrative) (Detail)	1 Months Ended	3 Months Ended			6 Months Ended			1 Months Ended	3 Months Ended		1 Months Ended
	Jun. 29, 2012	Jun. 30, 2012 USD ($)	Aug. 03, 2011	Jul. 02, 2011 USD ($)	Jun. 30, 2012 USD ($)	Jul. 02, 2011 USD ($)	Dec. 31, 2011 USD ($)	Mar. 18, 2011 Navis, LLC [Member] USD ($)	Mar. 31, 2012 Navis, LLC [Member] USD ($)	Jun. 30, 2012 Navis, LLC [Member] USD ($)	Aug. 03, 2011 Proveo Ag [Member] USD ($)	Jun. 29, 2012 Proveo Ag [Member] EUR (€)	Aug. 03, 2011 Proveo Ag [Member] EUR (€)
Proceeds from the sale of business					$ 13,790,000	$ 161,008,000		$ 188,588,000
Receivable from previously escrowed funds									13,790,000
Short term receivable from buyer		13,790,000			13,790,000		27,580,000			13,790,000
Gain (loss) recorded upon divestiture		613,000		788,000	613,000	68,001,000					(1,248,000)
Loan agreed to provide to the buyer												526,058	1,000,000
Loan, duration (date)	Dec. 31, 2012		Aug. 03, 2012
Loan, interest rate												6.50%	6.50%
Tax benefits realized		$ 0		$ 0	$ 0	$ 25,081,000					$ 13,308,000