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v3.20.1

Debt (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Debt Instrument [Line Items] |  |  |
Long-term debt | $ 272,800,000 | $ 162,734,000 |
Less debt issuance costs | (2,789,000) | (2,135,000) |
Total long-term debt | 270,011,000 | 160,599,000 |
Less current portion | (16,883,000) | (9,466,000) |
Long-term debt, less current portion | 253,128,000 | 151,133,000 |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
Total long-term debt | 270,011,000 | 160,599,000 |
Amended and Restated |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
Revolving loans, potential increment in maximum borrowing capacity | $ 100,000,000 |  |
Effective interest rate | 4.77% |  |
Interest expense, net | $ 13,300,000 | 6,900,000 | $ 7,200,000
Amended and Restated | LIBOR |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
Base margin | 2.50% |  |
Amended and Restated | Base Rate |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
Base margin | 1.25% |  |
Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt | $ 120,800,000 | 80,800,000 |
Total long-term debt | 120,800,000 |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
2020 | 17,813,000 |  |
2021 | 21,562,000 |  |
2022 | 22,500,000 |  |
2023 | 58,925,000 |  |
Total long-term debt | 120,800,000 |  |
Revolving Loans |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt | 152,000,000 | 81,934,000 |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
Revolving loans maximum borrowing capacity | 350,000,000 |  |
Letters of credit outstanding | $ 54,000 | $ 57,000 |
Minimum | Amended and Restated |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
Stated interest rate | 4.21% |  |
Maximum | Amended and Restated |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
Stated interest rate | 6.00% |  |

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