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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Cash Flow Hedge) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jul. 20, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Net after-tax loss included in accumulated other comprehensive earnings   $ 37 $ (1,547) $ 3,186  
Derivatives in Cash Flow Hedging Relationships          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)   8,361 20,039    
Cross Currency Swap Contract | Derivatives in Cash Flow Hedging Relationships          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Amount hedged         $ 280,000
Net after-tax loss included in accumulated other comprehensive earnings   1,700 $ 1,600    
Fair value of derivative asset   2,600      
Cross Currency Swap Contract: Interest Component | Derivatives in Cash Flow Hedging Relationships          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Amount expected to be recognized in earnings in next twelve months related to cross currency swap contract   $ 2,800      
Notes payable          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Proceeds from debt $ 280,000     $ 280,000  
Interest rate on notes (as a percent)   1.36% 1.36%