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Debt and Credit Agreements - Changes in the Balance of Deferred Debt Issuance Costs (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Change In Debt Issuance Costs, Net [Roll Forward]    
Balance $ 4,700  
Additions 0  
Amortization (241) $ (573)
Balance $ 4,459