XML 81 R68.htm IDEA: XBRL DOCUMENT v3.8.0.1
Derivatives - Additional Information (Details)
$ in Thousands
9 Months Ended
Mar. 07, 2017
USD ($)
Sep. 30, 2017
USD ($)
instruments
Jan. 26, 2017
USD ($)
Jul. 07, 2016
USD ($)
Rate
Derivative [Line Items]        
Derivative, notional amount       $ 250,000
Interest Rate Swap        
Derivative [Line Items]        
Derivative, net hedge ineffectiveness gain (loss) $ 800      
Derivative, notional amount     $ 300,000  
Effective fixed interest rate | Rate       2.87%
Cash Flow Hedging | Interest Rate Swap        
Derivative [Line Items]        
Outstanding interest rate swap contracts designated as cash flow hedges | instruments   5,000    
Derivative, net hedge ineffectiveness gain (loss)   $ 200