Discontinued Operations - Additional Information (Detail)	1 Months Ended	12 Months Ended			0 Months Ended	3 Months Ended		0 Months Ended	12 Months Ended
	Aug. 03, 2011	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Mar. 18, 2011 Navis, LLC [Member] USD ($)	Mar. 31, 2012 Navis, LLC [Member] USD ($)	Sep. 30, 2012 Navis, LLC [Member] USD ($)	Aug. 03, 2011 Proveo AG [Member] USD ($)	Dec. 31, 2013 Proveo AG [Member] USD ($)	Dec. 31, 2012 Proveo AG [Member] USD ($)	Dec. 31, 2012 Proveo AG [Member] EUR (€)	Aug. 03, 2011 Proveo AG [Member] EUR (€)
Proceeds from the sale of business		$ 0	$ 27,580,000	$ 161,206,000	$ 188,588,000
Short-term receivable from buyer				27,580,000			13,790,000
Receivable from Previously escrowed funds						13,790,000
Gain (loss) recorded upon divestiture		201,000	930,000	68,745,000				1,248,000	201,000	930,000
Loan agreed to provide to the buyer											526,058	1,000,000
Loan, duration (date)	Aug. 03, 2012
Loan, interest rate											6.50%	6.50%
Tax benefits realized		$ 0	$ 0	$ 11,773,000				$ 13,308,000