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Derivative Financial Instruments - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Mar. 12, 2018
Oct. 31, 2015
Debt Instrument [Line Items]          
Gain (loss) upon settlement of cash flow hedges, (less than $0.1 million) $ 200,000 $ (100,000)      
2015 Credit Facility          
Debt Instrument [Line Items]          
Amount of hedged item         $ 262,500,000
Maximum borrowing capacity         350,000,000
2018 Credit Facility          
Debt Instrument [Line Items]          
Notional amount       $ 170,600,000.0  
2015 Interest Rate Swap          
Debt Instrument [Line Items]          
Notional amount         $ 262,500,000
Fixed interest rate         1.46%
2018 Interest Rate Swap          
Debt Instrument [Line Items]          
Notional amount       170,600,000.0  
Amount of hedged item       $ 170,600,000  
Fixed interest rate       2.937%  
Recurring | Designated as Hedging Instrument          
Debt Instrument [Line Items]          
Net derivative asset (liability) $ (400,000)   $ 1,800,000