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Debt (Details Textual) - USD ($) $ in Millions | 1 Months Ended |  |
--- | --- | --- | ---
May 31, 2017 | Jun. 30, 2019 | Dec. 31, 2018
Senior Notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Net unamortized debt issuance costs |  | $ 3.8 | $ 4.1
Debt Instrument, Face Amount | $ 250.0 |  |
Proceeds from Debt | $ 245.0 |  |
Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Net unamortized debt issuance costs |  | 2.7 | $ 2.2
Line of credit facility maximum borrowing capacity |  | 250.0 |
Line of Credit Facility, Current Borrowing Capacity |  | $ 197.0 |
Stated interest rate |  | 5.90% |
Interest rate swap |  |  |
Debt Instrument [Line Items] |  |  |
Derivative, Notional Amount |  | $ 75.0 |

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