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Debt and Credit Arrangements - Summary of Outstanding Borrowings (Details) - USD ($) | Mar. 31, 2020 | Dec. 31, 2019 | Jun. 14, 2019 | Nov. 06, 2017
--- | --- | --- | --- | ---
Debt Instrument |  |  |  |
Total debt, net of unamortized discount and debt issuance costs | $ 754,400,000 | $ 777,300,000 |  |
Less: current maturities | 12,000,000.0 | 15,700,000 |  |
Less: current portion of unamortized debt issuance costs | 900,000 | 600,000 |  |
Long-term debt | 741,500,000 | 761,000,000.0 |  |
Foreign facilities |  |  |  |
Debt Instrument |  |  |  |
Foreign facilities | 700,000 | 4,400,000 |  |
Revolving Credit Facility | Credit Facilities 2019 |  |  |  |
Debt Instrument |  |  |  |
Unamortized debt issuance costs | (5,200,000) | (5,500,000) |  |
Senior secured revolving credit facility and term loan, net of debt issuance costs | 539,300,000 | 560,700,000 |  |
Revolving Credit Facility | Term loan |  |  |  |
Debt Instrument |  |  |  |
Long term debt | $ 444,400,000 | 447,200,000 |  |
Debt instrument stated interest rate (percent) | 3.05% |  |  |
Debt instrument percentage of principal due annually, through year two (percent) | 2.50% |  |  |
Debt instrument percentage of principal due annually, year three (percent) | 5.00% |  |  |
Debt instrument percentage of principal due annually, year four (percent) | 7.50% |  |  |
Debt instrument percentage of principal due annually, year three (percent) | 10.00% |  |  |
Maximum borrowing capacity |  |  | $ 450,000,000.0 |
Revolving Credit Facility | Senior secured revolving credit facility |  |  |  |
Debt Instrument |  |  |  |
Long term debt | $ 100,100,000 | $ 119,000,000.0 |  |
Unamortized debt issuance costs | $ (8,500,000) |  |  |
Maximum borrowing capacity |  |  | 550,000,000.0 |
Weighted average interest rate (percent) | 2.29% |  |  |
Letters of credit outstanding | $ 64,700,000 |  |  |
Line of credit remaining borrowing amount | $ 385,200,000 |  |  |
Revolving Credit Facility | Foreign facilities |  |  |  |
Debt Instrument |  |  |  |
Weighted average interest rate (percent) | 1.40% | 1.30% |  |
Letters of credit outstanding | $ 34,900,000 | $ 12,600,000 |  |
Line of credit remaining borrowing amount | 20,800,000 | 23,100,000 |  |
Revolving Credit Facility Sub-limit - Letters of Credit | Senior secured revolving credit facility |  |  |  |
Debt Instrument |  |  |  |
Maximum borrowing capacity |  |  | 100,000,000.0 |
Revolving Credit Facility Sub-limit - Discretionary Letters of Credit | Senior secured revolving credit facility |  |  |  |
Debt Instrument |  |  |  |
Maximum borrowing capacity |  |  | 250,000,000.0 |
Revolving Credit Facility Sub-limit - Swingline | Senior secured revolving credit facility |  |  |  |
Debt Instrument |  |  |  |
Maximum borrowing capacity |  |  | $ 50,000,000.0 |
Convertible Debt | Convertible Notes, due 2024 |  |  |  |
Debt Instrument |  |  |  |
Unamortized debt issuance costs | (3,600,000) | (3,800,000) |  |
Principal amount | 258,800,000 | 258,800,000 |  | $ 258,800,000
Unamortized discount | (40,800,000) | (42,800,000) |  |
Convertible Debt | $ 214,400,000 | $ 212,200,000 |  |
Debt instrument stated interest rate (percent) |  |  |  | 1.00%

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