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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, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Payment for Debt Extinguishment or Debt Prepayment Cost |  |  | $ 8.4 | $ (0.0) |
Write off of Deferred Debt Issuance Cost |  |  | 11.3 | $ 0.0 |
Secured Debt, Current |  | $ 0.6 | 0.6 |  |
Finance Lease, Liability, Current |  | $ 0.1 | $ 0.1 |  |
Debt, Weighted Average Interest Rate, Net of Currency Swap Contract |  | 3.10% | 3.10% |  |
Debt Including Related Cross-currency Swap Instrument [Member] |  |  |  |  |
Debt, Weighted Average Interest Rate |  | 3.60% | 3.60% |  |
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 |  |  |  |
Long-term Debt, Current Maturities, Total |  | $ 2.5 | $ 2.5 |  |
Letters of Credit Outstanding, Amount |  | 3.2 | 3.2 |  |
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] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |
Debt Instrument, Variable Rate Floor | 1.00% |  |  |  |
The 2021 Credit Agreement [Member] | LIBOR on Eurocurrency Liabilities [Member] |  |  |  |  |
Debt Instrument, Variable Rate Floor | 0.00% |  |  |  |
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 |  | $ 10.0
Debt Instrument, Unused Borrowing Capacity, Amount |  | 278.8 | 278.8 |  |
Line of Credit Facility, Commitment Fee Amount |  |  | 0.5 |  |
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 |  | 100.0 | 100.0 |  | 0.0
Senior Unsecured Notes [Member] |  |  |  |  |
Debt Instrument, Amount Redeemed |  | $ 300.0 | $ 300.0 |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 5.625% | 5.625% |  |
Write off of Deferred Debt Issuance Cost |  | $ 2.9 |  |  |
Long-term Debt, Gross |  | $ 0.0 | $ 0.0 |  | $ 300.0
Senior Unsecured Notes [Member] | Debt Redemption Call Premium [Member] |  |  |  |  |
Payment for Debt Extinguishment or Debt Prepayment Cost |  |  | $ 8.4 |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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