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Contingencies - Additional Information (Detail) - USD ($)
12 Months Ended
Feb. 29, 2016
Oct. 29, 2012
Jun. 06, 2012
Dec. 31, 2015
Dec. 31, 2012
Dec. 31, 2014
Dec. 31, 2013
Jul. 31, 2012
Commitment And Contingencies [Line Items]                
Amount approved to be paid under the agreement     $ 34,200,000          
Interest rate on settlement amount approved to be paid under the agreement (as a percent)     3.00%          
Settlement agreement description       The Company agreed to pay $34.2 million (plus interest at a rate of 3% from May 5, 2011 through the day before payment was made)        
Amount of fine paid   $ 7,800,000            
Mandatory special assessment   400            
Amount paid to settlement of claims   32,000,000   $ 1,300,000        
Amount used from escrow fund through acquisition of Blackstone for legal settlement   $ 32,000,000            
Judgments and settlement costs       300,000   $ 3,800,000 $ 6,700,000  
Discontinued operations for compensatory damages and exemplary damages               $ 5,700,000
IMSS [Member]                
Commitment And Contingencies [Line Items]                
Agreement consisting of cash and inventory included in general and administrative expense       $ 4,000,000        
IMSS [Member] | Subsequent Event [Member]                
Commitment And Contingencies [Line Items]                
Settlement amount payable in cash $ 1,000,000              
Settlement amount payable in form of products and training $ 3,000,000              
Litigation Related To Promeca                
Commitment And Contingencies [Line Items]                
Deferred prosecution agreement term         3 years