Annual report pursuant to Section 13 and 15(d)

Quarterly Consolidated Results of Operations (Unaudited) (Details)

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Quarterly Consolidated Results of Operations (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Quarterly Financial Information Disclosure [Abstract]                      
Total revenues $ 1,070,004 $ 1,021,294 $ 975,822 $ 969,581 $ 938,647 $ 913,809 $ 876,885 $ 750,673 $ 4,036,701 $ 3,480,014 $ 2,984,493
Gross margin 692,106 652,606 628,488 616,132 590,717 570,535 558,378 472,837      
Net income (loss) $ 348,767 [1] $ 306,881 [1] $ (134,319) [1] $ 280,936 [1] $ 256,162 $ 253,562 $ 238,251 $ 178,101 $ 802,265 $ 926,076 $ 704,422
Net income per share:                      
Basic (in dollars per share) $ 2.24 [2] $ 1.96 [2] $ (0.86) [2] $ 1.79 [2] $ 1.64 [2] $ 1.62 [2] $ 1.52 [2] $ 1.14 [2] $ 5.13 $ 5.92 $ 4.52
Diluted (in dollars per share) $ 2.22 [2] $ 1.95 [2] $ (0.86) [2] $ 1.78 [2] $ 1.62 [2] $ 1.61 [2] $ 1.52 [2] $ 1.13 [2] $ 5.10 $ 5.88 $ 4.49
[1] The Company had net loss of $134.3 million in the second quarter of the fiscal year ended June 30, 2018, primarily as a result of the income tax effects from the enacted tax reform legislation through the Tax Cuts and Jobs Act, which was signed into law on December 22, 2017.
[2] Basic and diluted net income (loss) per share are computed independently for each of the quarters presented based on the weighted-average basic and fully diluted shares outstanding for each quarter. Therefore, the sum of quarterly basic and diluted net income (loss) per share information may not equal annual basic and diluted net income (loss) per share.