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Financing Arrangements - Aggregate Amount of Maturities for Debt (Details)
Mar. 31, 2019
USD ($)
Debt Disclosure [Abstract]  
Remainder of 2019 $ 5,547,000
2020 7,396,000
2021 7,396,000
2022 7,396,000
2023 4,800,000
2024 4,800,000
Thereafter $ 452,600,000