Annual report pursuant to Section 13 and 15(d)

Note 9 - Share-based Compensation and Other Benefit Plans (Details Textual)

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Note 9 - Share-based Compensation and Other Benefit Plans (Details Textual) - USD ($)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance 3,452,000 2,821,000 1,819,000 1,137,000
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost $ 8,300,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 22.07 $ 18.21 $ 18.50  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ 10,600,000 $ 2,300,000 $ 2,400,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value 8,800,000 5,000,000 2,000,000  
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense   $ 500,000 $ 600,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total $ 26,700,000      
Share-based Compensation Arrangement by Share-based Payment Award, Non-vested, Forfeiture Rate 3.00%      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 36 days      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total 1,087,000 1,135,000 805,000  
Profit Sharing and Savings Plan [Member] | UNITED STATES        
Defined Contribution Plan, Cost $ 2,500,000 $ 2,200,000 $ 1,200,000  
Profit Sharing and Savings Plan [Member] | UNITED KINGDOM        
Defined Contribution Plan, Cost 1,400,000 800,000 800,000  
Selling, General and Administrative Expenses [Member]        
Allocated Share-based Compensation Expense, Total 28,200,000 14,600,000 9,400,000  
Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value 1,700,000 1,400,000 1,400,000  
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 1,600,000 900,000 500,000  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years      
Equity Incentive Plan 2010 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 6,600,000      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 2,400,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance 3,400,000      
Equity Incentive Plan 2010 [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years      
Nonqualified Stock Options Plan 1998 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance 35,000      
Employee Stock Purchase Plan 2014 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 200,000      
Allocated Share-based Compensation Expense, Total $ 281,000 213,000 144,000  
Performance Incentive Programs [Member] | Executive Officer [Member]        
Salary and Wage, Officer, Excluding Cost of Good and Service Sold $ 7,200,000 $ 4,700,000 $ 4,200,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total 553,750 896,778 620,917  
Performance Incentive Programs [Member] | Restricted Stock [Member] | Executive Officer [Member]        
Stock Issued During Period, Shares, Restricted Stock Award, Gross 14,194 16,653 39,931  
Performance Incentive Programs [Member] | Restricted Stock Units (RSUs) [Member] | Executive Officer [Member]        
Stock Issued During Period, Shares, Restricted Stock Award, Gross 35,174 11,522 26,583