Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Supplemental Equity and Accumulated Other Comprehensive Income (Loss) (Details Textual)

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Note 8 - Supplemental Equity and Accumulated Other Comprehensive Income (Loss) (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Jul. 01, 2018
Jun. 30, 2018
Common Stock, Dividends, Per Share, Declared (in dollars per share) $ 0.32 $ 0.32 $ 0.96 $ 0.96                
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent     $ 1,600 $ 0                
Stockholders' Equity Attributable to Parent, Ending Balance $ 1,291,268 $ 1,146,266 1,291,268 1,146,266   $ 1,323,348 $ 1,174,224 $ 1,165,589 $ 1,096,425 $ 1,109,469   $ 1,079,061
Retained Earnings (Accumulated Deficit), Ending Balance 1,012,713   1,012,713         931,934        
Interest Expense, Total 4,486 5,113 14,580 16,110                
Income Tax Expense (Benefit), Total 10,389 5,223 44,501 9,617                
Deferred Income Tax Expense (Benefit), Total     (4,390) (1,792)                
AOCI Attributable to Parent [Member]                        
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent [1]     (1,614)                  
Stockholders' Equity Attributable to Parent, Ending Balance $ (103,458) [1],[2] $ (79,633) [1] (103,458) [1],[2] $ (79,633) [1]   $ (78,352) $ (91,627) (83,521) $ (83,011) $ (70,632)   (44,814)
Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI Attributable to Parent [Member]                        
Interest Expense, Total     2,102                  
Income Tax Expense (Benefit), Total     $ 488                  
Cumulative Effect, Period of Adoption, Adjustment [Member]                        
Stockholders' Equity Attributable to Parent, Ending Balance               $ (879)       594
Cumulative Effect, Period of Adoption, Adjustment [Member] | AOCI Attributable to Parent [Member]                        
Stockholders' Equity Attributable to Parent, Ending Balance                       $ (24,682)
Accounting Standards Updates 2016-01 and 2018-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]                        
Retained Earnings (Accumulated Deficit), Ending Balance                     $ 24,682  
Forecast [Member]                        
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent         $ 7,487              
Stockholders' Equity Attributable to Parent, Ending Balance         $ 14,336              
[1] The Company reclassified ($2,102) to interest expense and a related tax benefit tax of $488 during the nine months ended March 31, 2020. The Company had deferred tax benefits of $4,390 and $1,792 included in the accumulated other comprehensive income loss as of March 31, 2020 and March 31, 2019, respectively.
[2] The gain (loss) on the interest rate swap will be reclassified into interest expense as payments on the derivative agreement are made. Approximately ($7,487) of the ($14,336) will be reclassified into earnings in the 12 months subsequent to March 31, 2020.