XML 39 R28.htm IDEA: XBRL DOCUMENT v3.7.0.1
Long-Term Debt - Additional Information (Detail) - 3 months ended Mar. 31, 2017
USD ($)
EUR (€)
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 6,200,000 € 5,800,000
Amount outstanding under lines of credit $ 0  
Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Debt instrument term (in years) 5 years  
Maximum borrowing capacity $ 125,000,000  
Amount outstanding under lines of credit $ 0