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Stockholders' Equity - Stock-based Compensation (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2019 USD ($) $ / shares shares | Sep. 30, 2018 $ / shares shares | Mar. 31, 2018 USD ($) | Mar. 31, 2019 USD ($) ShareBasedCompensationPlan $ / shares shares | Mar. 31, 2018 USD ($) shares
Stock-based Compensation |  |  |  |  |
Stock-based compensation expense | $ | $ 5,888 |  | $ 6,014 | $ 19,514 | $ 17,754
RSU |  |  |  |  |
Stock-based Compensation |  |  |  |  |
Unrecognized compensation cost | $ | $ 19,400 |  |  | $ 19,400 |
Weighted-average period |  |  |  | 1 year 10 months 24 days |
Shares |  |  |  |  |
Nonvested at the beginning of the period (in shares) |  | 526,377 |  | 526,377 |
Granted (in shares) |  |  |  | 362,025 |
Vested (in shares) |  |  |  | (357,924) |
Forfeited (in shares) |  |  |  | (13,669) |
Nonvested at the end of the period (in shares) | 516,809 |  |  | 516,809 |
Weighted-Average Fair Value |  |  |  |  |
Nonvested at the beginning of the period (in dollars per share) | $ / shares |  | $ 71.56 |  | $ 71.56 |
Granted (in dollars per share) | $ / shares |  |  |  | 73.80 |
Vested (in dollars per share) | $ / shares |  |  |  | 71.01 |
Forfeited (in dollars per share) | $ / shares |  |  |  | 73.74 |
Nonvested at the end of the period (in dollars per share) | $ / shares | $ 73.45 |  |  | $ 73.45 |
Stock options |  |  |  |  |
Stock-based Compensation |  |  |  |  |
Unrecognized compensation cost | $ | $ 600 |  |  | $ 600 |
Weighted-average period |  |  |  | 2 years |
Number of Options |  |  |  |  |
Outstanding at the beginning of the period (in shares) |  | 677,525 |  | 677,525 |
Granted (in shares) |  |  |  | 18,135 |
Exercised (in shares) |  |  |  | (108,008) |
Expired or forfeited (in shares) |  |  |  | (9,618) |
Outstanding at the end of the period (in shares) | 578,034 |  |  | 578,034 |
Exercisable at the end of the period (in shares) | 540,646 |  |  | 540,646 |
Weighted Average Exercise Price |  |  |  |  |
Outstanding at the beginning of the period (in dollars per share) | $ / shares |  | $ 32.80 |  | $ 32.80 |
Granted (in dollars per share) | $ / shares |  |  |  | 72.39 |
Exercised (in dollars per share) | $ / shares |  |  |  | 22.82 |
Expired or forfeited (in dollars per share) | $ / shares |  |  |  | 70.28 |
Outstanding at the end of the period (in dollars per share) | $ / shares | $ 35.29 |  |  | 35.29 |
Exercisable at the end of the period (in dollars per share) | $ / shares | $ 32.37 |  |  | $ 32.37 |
Weighted-Average Remaining Contractual Term |  |  |  |  |
Outstanding at the end of the period |  | 2 years 7 months 6 days |  |  |
Exercisable at the end of the period |  | 2 years 1 month 6 days |  |  |
Aggregate Intrinsic Value |  |  |  |  |
Outstanding at the end of the period | $ | $ 30,247 |  |  | $ 30,247 |
Exercisable at the end of the period | $ | $ 29,865 |  |  | $ 29,865 |
Performance-based restricted stock units |  |  |  |  |
Shares |  |  |  |  |
Granted (in shares) |  |  |  | 97,514 | 117,346
Performance-based restricted stock units | Minimum |  |  |  |  |
Weighted-Average Fair Value |  |  |  |  |
Payout as a percentage of the original number of shares awarded or units awarded, which are converted into shares of the Company's common stock |  |  |  | 0.00% |
Performance-based restricted stock units | Maximum |  |  |  |  |
Weighted-Average Fair Value |  |  |  |  |
Payout as a percentage of the original number of shares awarded or units awarded, which are converted into shares of the Company's common stock |  |  |  | 280.00% |
2012 Plan |  |  |  |  |
Weighted-Average Fair Value |  |  |  |  |
Shares available for grant | 1,600,000 |  |  | 1,600,000 |
2012 Plan | RSU |  |  |  |  |
Weighted-Average Fair Value |  |  |  |  |
Number of shares available for grant reduced for each award granted |  |  |  | 1.87 |
Number of shares available for grant increased for each award forfeited and returned |  |  |  | 1.87 |
2005 AS&E Plan and the 2014 AS&E Plan |  |  |  |  |
Stock-based Compensation |  |  |  |  |
Number of share-based employee compensation plans assumed | ShareBasedCompensationPlan |  |  |  | 2 |
2005 AS&E Plan and the 2014 AS&E Plan | RSU |  |  |  |  |
Shares |  |  |  |  |
Granted (in shares) |  |  |  | 0 |
2006 Plan |  |  |  |  |
Number of Options |  |  |  |  |
Granted (in shares) |  |  |  | 0 |
Cost of goods sold |  |  |  |  |
Stock-based Compensation |  |  |  |  |
Stock-based compensation expense | $ | $ 182 |  | 251 | $ 539 | $ 739
Selling, general and administrative |  |  |  |  |
Stock-based Compensation |  |  |  |  |
Stock-based compensation expense | $ | 5,543 |  | 5,614 | 18,487 | 16,574
Research and development |  |  |  |  |
Stock-based Compensation |  |  |  |  |
Stock-based compensation expense | $ | $ 163 |  | $ 149 | $ 488 | $ 441

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