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Derivative Instruments and Hedging Activities - Additional Information (Details)
€ in Millions, £ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2014
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2013
EUR (€)
Dec. 31, 2013
GBP (£)
Derivative        
Payments for (Proceeds from) Derivative Instrument, Financing Activities $ 20.0      
Net loss included in accumulated other comprehensive income (loss) to be reclassified into interest expense within the next 12 months   $ (0.9)    
Foreign Exchange Forward | Pound Sterling Notional Amount        
Derivative        
Derivative, Notional Amount | £       £ 70
Foreign Exchange Forward | Euro Notional Amount        
Derivative        
Derivative, Notional Amount | €     € 150