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Note 17 - Subsequent Event (Details Textual) - USD ($) $ in Millions | Apr. 05, 2021 | Apr. 02, 2021 | Mar. 31, 2021
--- | --- | --- | ---
Senior Unsecured Notes [Member] |  |  |
Long-term Debt, Total |  |  | $ 300.0
Subsequent Event [Member] | The 2021 Credit Agreement [Member] |  |  |
Debt Instrument, Collateral, Percentage of Stock of First Tier Foreign Subsidiaries | 65.00% |  |
Debt Instrument, Covenant, Adjusted EBITDA, Maximum | 3.50 |  |
Debt Instrument, Covenant, Minimum Permitted Acquisition, Alternative Requirements for Indebtedness to EBITDA Ratio | $ 50.0 |  |
Debt Instrument, Covenant, Adjusted EBITDA to Interest Expense Ratio, Minimum | 3.00 |  |
Debt Instrument, Covenant, Minimum Leverage Ratio for Dividends or Repurchase of Stock | 2.50 |  |
Debt Instrument, Restrictions, Maximum Dividends Payout or Repurchase of Stock | $ 60.0 |  |
Subsequent Event [Member] | The 2021 Credit Agreement [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |  |
Subsequent Event [Member] | The 2021 Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Debt Instrument, Variable Rate Floor | 1.00% |  |
Subsequent Event [Member] | The 2021 Credit Agreement [Member] | LIBOR on Eurocurrency Liabilities [Member] |  |  |
Debt Instrument, Variable Rate Floor | 0.00% |  |
Subsequent Event [Member] | The 2021 Credit Agreement [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.10% |  |
Subsequent Event [Member] | The 2021 Credit Agreement [Member] | Minimum [Member] | LIBOR on Eurocurrency Liabilities [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.10% |  |
Subsequent Event [Member] | The 2021 Credit Agreement [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.70% |  |
Subsequent Event [Member] | The 2021 Credit Agreement [Member] | Maximum [Member] | LIBOR on Eurocurrency Liabilities [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.70% |  |
Subsequent Event [Member] | The 2021 Credit Agreement [Member] | Revolving Credit Facility [Member] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 450.0 |  |
Line of Credit Facility, Additional Borrowings Option | $ 275.0 |  |
Subsequent Event [Member] | The 2021 Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] |  |  |
Line of Credit Facility, Commitment Fee Percentage | 0.15% |  |
Subsequent Event [Member] | The 2021 Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] |  |  |
Line of Credit Facility, Commitment Fee Percentage | 0.30% |  |
Subsequent Event [Member] | The 2021 Credit Agreement [Member] | Term Loan [Member] |  |  |
Debt Instrument, Face Amount | $ 100.0 |  |
Subsequent Event [Member] | Senior Unsecured Notes [Member] |  |  |
Long-term Debt, Total |  | $ 300.0 |
Debt Instrument, Interest Rate, Stated Percentage |  | 5.625% |
Debt Instrument, Redemption Premium |  | $ 8.4 |
Write off of Deferred Debt Issuance Cost |  | $ 2.8 |

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