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Note 21 - Other Supplemental Information - Summary of Other Supplemental Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Income tax, net of refunds | $ 73,031 | $ 42,153
Interest | 27,685 | 20,404
Increases (Decreases) in capital lease obligations | (616) | (522)
Dividends declared but not paid | 1,992 | 1,961
Rent expense | $ 76,893 | $ 74,183

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