XML 92 R75.htm IDEA: XBRL DOCUMENT v3.7.0.1
Derivative Instruments (Narrative) (Details)
£ in Millions
3 Months Ended
Mar. 31, 2017
USD ($)
instrument
Mar. 31, 2016
USD ($)
Mar. 31, 2017
GBP (£)
Dec. 31, 2016
instrument
Derivative [Line Items]        
Ineffective portion of cash flow hedges $ 0 $ 0    
Gain (loss) to be reclassified within twelve months (3,100,000)      
Proceeds from forward contracts $ 51,308,000 $ 0    
Designated as Hedging Instrument | Currency forward contracts        
Derivative [Line Items]        
Number of forward contracts terminated | instrument 3      
Number of Instruments | instrument       4
Notional amount | £     £ 270.0  
Proceeds from forward contracts $ 51,300,000