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Derivative Financial Instruments - Additional Information (Details)
3 Months Ended
Mar. 31, 2016
USD ($)
item
Mar. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Derivative [Line Items]      
Foreign currency unrealized losses expected to be reclassified into earnings over next twelve months $ (7,700,000)    
Interest Rate Swap Agreements      
Derivative [Line Items]      
Number of derivative contracts | item 2    
Average fixed interest rate (as a percent) 1.03325%   0.8775%
Interest Rate Swap Agreements | U.S. dollars      
Derivative [Line Items]      
Variable Rate Basis LIBOR    
Foreign Currency Forward Exchange Contracts      
Derivative [Line Items]      
Number of credit contingency features | item 0    
Foreign Currency Forward Exchange Contracts | Cash Flow Hedging      
Derivative [Line Items]      
Gains (losses) in other comprehensive income, effective portion $ 5,800,000 $ (23,700,000)  
Designated as Hedging Instrument | Swaps matured March 2016      
Derivative [Line Items]      
Notional amount 50,000,000    
Designated as Hedging Instrument | Swaps maturing September 2016      
Derivative [Line Items]      
Notional amount 50,000,000    
Designated as Hedging Instrument | Swaps maturing March 2017      
Derivative [Line Items]      
Notional amount 50,000,000    
Designated as Hedging Instrument | Interest Rate Swap Agreements      
Derivative [Line Items]      
Notional amount 100,000,000    
Floating rate obligation 50,000,000    
Carrying value / fair value of derivative liabilities included in other liabilities 200,000   $ 100,000
Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts      
Derivative [Line Items]      
Notional amount 426,900,000   417,500,000
Carrying value / fair value of derivative liabilities included in other liabilities 14,300,000   22,100,000
Carrying value / fair value of derivative assets included in other assets 4,100,000   900,000
Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts | Cash Flow Hedging      
Derivative [Line Items]      
Net gain (loss) recognized in gross margin (5,200,000) (3,600,000)  
Not Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts      
Derivative [Line Items]      
Carrying value / fair value of derivative liabilities included in other liabilities 100,000   400,000
Carrying value / fair value of derivative assets included in other assets 3,100,000   $ 400,000
Net gains (losses) on derivative contracts not designated as hedges $ 4,200,000 $ (16,600,000)