RESTRUCTURING CHARGES - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended				9 Months Ended	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	Dec. 31, 2009	Sep. 30, 2011 Regulated returns and recall management services	Sep. 30, 2011 Reorganization of International Management Group Structure	Jun. 30, 2011 Reorganization of International Management Group Structure	Mar. 31, 2011 Reorganization of International Management Group Structure	Sep. 30, 2011 Lower Limit	Sep. 30, 2011 Maximum
Significant Acquisitions and Disposals [Line Items]
Restructuring cost	$ 633,000	$ 216,000	$ 1,086,000	$ 2,446,000			$ 100,000	$ 600,000	$ 300,000	$ 300,000
Accrual balance related to the restructuring	870,000		870,000		2,052,000	672,000
Additional restructuring expense, expected											$ 1,200,000	$ 1,500,000