Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Debt and Other Financing Arrangements (Details Textual)

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Note 6 - Debt and Other Financing Arrangements (Details Textual) - USD ($)
$ in Thousands
6 Months Ended
Aug. 01, 2018
Dec. 31, 2018
Dec. 31, 2017
Proceeds from Long-term Lines of Credit   $ 580,000 $ 25,000
Credit Agreement [Member]      
Long-term Debt, Total   $ 545,800  
Credit Agreement [Member] | Term Loan [Member]      
Debt Instrument, Face Amount $ 250,000    
Proceeds from Issuance of Long-term Debt, Total 250,000    
Revolving Credit Facility [Member] | Credit Agreement [Member]      
Line of Credit Facility, Maximum Borrowing Capacity 600,000    
Line of Credit Facility, Additional Borrowing Capacity $ 200,000    
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.20%    
Proceeds from Long-term Lines of Credit $ 330,000