Consolidated Statements of Earnings and Comprehensive Income - USD ($)
shares in Thousands
 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Net sales $ 499,023,000 $ 452,246,000 $ 357,763,000
Cost of sales 162,364,000 144,969,000 106,352,000
Gross margin 336,659,000 307,277,000 251,411,000
Operating expenses:      
Selling, general and administrative 140,879,000 119,401,000 60,716,000
Research and development 45,187,000 40,853,000 30,945,000
Total operating expenses 186,066,000 160,254,000 91,661,000
Operating income 150,593,000 147,023,000 159,750,000
Other income (expense):      
Interest expense (1,748,000) (1,544,000) 0
Interest income 249,000 634,000 2,684,000
Other non-operating income (expense), net (1,613,000) 8,049,000 (1,042,000)
Total other income (expense) (3,112,000) 7,139,000 1,642,000
Earnings before income taxes 147,481,000 154,162,000 161,392,000
Income taxes 43,005,000 46,427,000 50,444,000
Net earnings 104,476,000 107,735,000 110,948,000
Other comprehensive income (loss):      
Foreign currency translation adjustments (19,932,000) (36,513,000) 15,819,000
Unrealized (losses) gains on available-for-sale investments, net of tax of ($3,794), $3,895, and ($17,110) respectively (19,924,000) 11,308,000 (35,760,000)
Other comprehensive (loss) income (39,812,000) (25,205,000) (19,941,000)
Comprehensive income $ 64,664,000 $ 82,530,000 $ 91,007,000
Earnings per share:      
Basic (in dollars per share) $ 2.81 $ 2.90 $ 3.01
Diluted (in dollars per share) 2.80 2.89 3
Cash dividends per common share: (in dollars per share) $ 1.28 $ 1.27 $ 1.23
Weighted average common shares outstanding:      
Basic (in shares) 37,194 37,096 36,890
Diluted (in shares) 37,326 37,231 37,005