v3.2.0.727
Risk Management And Derivatives (Narrative) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Derivative [Line Items]          
Maturity of foreign currency forward contract     8 months    
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net $ 1,000   $ 1,400    
Notional Amount of Interest Rate Derivatives 348,900   $ 348,900    
Derivative, Lower Remaining Maturity Range     1 month    
Interest Rate Swap [Member]          
Derivative [Line Items]          
Notional Amount of Interest Rate Derivatives 179,400   $ 179,400    
Derivative Instruments, Gain (Loss) Recognized in Income, Net 700 $ 300 1,400 $ 400  
Fair Value, Inputs, Level 2 [Member]          
Derivative [Line Items]          
Foreign Currency Contract, Asset, Fair Value Disclosure 1,396   1,396   $ 806
Foreign Currency Contracts, Liability, Fair Value Disclosure   (531)   (531)  
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]          
Derivative [Line Items]          
Interest Rate Derivatives, at Fair Value, Net $ (1,032) $ 201 $ (1,032) $ 201 $ (607)