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Note 8 - Debt (Details Textual) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 05, 2021 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2017 | Apr. 18, 2017
Payment for Debt Extinguishment or Debt Prepayment Cost |  |  | $ (0.0) | $ 8.4 |  |  |
Write off of Deferred Debt Issuance Cost |  |  | $ 0.0 | $ 11.3 |  |  |
Debt, Weighted Average Interest Rate, Net of Currency Swap Contract |  |  | 0.90% |  |  |  |
The 2021 Credit Agreement [Member] |  |  |  |  |  |  |
Debt Instrument, Collateral, Percentage of Stock of First Tier Foreign Subsidiaries | 65.00% |  |  |  |  |  |
Debt Instrument, Dividend Payments Allowed Per Quarter | $ 7.5 |  |  |  |  |  |
Debt Instrument, Covenant, Minimum Permitted Acquisition, Alternative Requirements for Indebtedness to EBITDA Ratio | $ 50.0 |  |  |  |  |  |
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 |  |  |  |  |  |
Long-Term Debt, Current Maturities, Total |  |  | $ 5.0 |  |  |  |
Secured Debt, Current |  |  | 0.2 |  |  |  |
Letters of Credit Outstanding, Amount |  |  | 2.9 |  |  |  |
Line of Credit Facility, Commitment Fee Amount |  |  | 0.4 |  |  |  |
The 2021 Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |
Debt Instrument, Variable Rate Floor | 1.00% |  |  |  |  |  |
The 2021 Credit Agreement [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |  |  |  |  |  |
The 2021 Credit Agreement [Member] | Minimum [Member] |  |  |  |  |  |  |
Debt Instrument, Other Restricted Payments Allowed Per Quarter | $ 60.0 |  |  |  |  |  |
The 2021 Credit Agreement [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.10% |  |  |  |  |  |
The 2021 Credit Agreement [Member] | Minimum [Member] | LIBOR on Eurocurrency Liabilities [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.10% |  |  |  |  |  |
The 2021 Credit Agreement [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.70% |  |  |  |  |  |
The 2021 Credit Agreement [Member] | Maximum [Member] | LIBOR on Eurocurrency Liabilities [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.70% |  |  |  |  |  |
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 |  |  |  |  |  |
Long-Term Debt, Gross |  |  | 168.0 |  | $ 168.0 |  |
Debt Instrument, Unused Borrowing Capacity, Amount |  |  | 279.1 |  |  |  |
The 2021 Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] |  |  |  |  |  |  |
Line of Credit Facility, Commitment Fee Percentage | 0.15% |  |  |  |  |  |
The 2021 Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] |  |  |  |  |  |  |
Line of Credit Facility, Commitment Fee Percentage | 0.30% |  |  |  |  |  |
The 2021 Credit Agreement [Member] | Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 100.0 |  |  |  |  |  |
Long-Term Debt, Gross |  |  | $ 97.5 |  | $ 98.8 |  |
The 2017 Credit Agreement [Member] |  |  |  |  |  |  |
Debt Instrument, Covenant, Senior Secured Net Indebtedness to Adjusted EBITDA Ratio, Maximum |  |  |  |  |  | 3.50 |
The 2017 Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |
Debt Instrument, Variable Rate Floor |  |  |  |  |  | 0.00% |
Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  | $ 300.0
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | 5.625%
Write off of Deferred Debt Issuance Cost |  | $ 2.9 |  |  |  |  |
Senior Unsecured Notes [Member] | Debt Redemption Call Premium [Member] |  |  |  |  |  |  |
Payment for Debt Extinguishment or Debt Prepayment Cost |  | $ 8.4 |  |  |  |  |
Debt Including Related Cross-currency Swap Instrument [Member] |  |  |  |  |  |  |
Debt, Weighted Average Interest Rate |  |  | 2.00% |  |  |  |

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- Definition The minimum amount of permitted acquisition to have alternative requirements for the indebtedness to EBITDA ratio under the covenant of the debt instrument. + References No definition available. + Details
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