Quarterly report pursuant to Section 13 or 15(d)

Financing Arrangements - Maturities of Long-term Debt (Details)

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Financing Arrangements - Maturities of Long-term Debt (Details)
$ in Thousands
Mar. 31, 2018
USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]  
2018 (remaining nine months) $ 16,656
2019 22,413
2020 25,416
2021 25,046
2022 103,047
Thereafter 588,871
Long-term debt $ 781,449