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Stockholders' Equity - Stock-based Compensation (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2018 USD ($) $ / shares shares | Sep. 30, 2018 $ / shares shares | Dec. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) ShareBasedCompensationPlan $ / shares shares | Dec. 31, 2017 USD ($) shares
Stock-based Compensation |  |  |  |  |
Stock-based compensation expense, before taxes | $ | $ 8,163 |  | $ 6,253 | $ 13,626 | $ 11,740
Less: related income tax benefit | $ | (2,038) |  | (1,935) | (3,380) | (3,627)
Stock-based compensation expense, net of estimated taxes | $ | 6,125 |  | 4,318 | 10,246 | $ 8,113
RSU |  |  |  |  |
Stock-based Compensation |  |  |  |  |
Unrecognized compensation cost | $ | $ 24,700 |  |  | $ 24,700 |
Weighted-average period |  |  |  | 1 year 9 months 18 days |
Shares |  |  |  |  |
Nonvested at the beginning of the period (in shares) |  | 526,377 |  | 526,377 |
Granted (in shares) |  |  |  | 358,213 |
Vested (in shares) |  |  |  | (356,705) |
Forfeited (in shares) |  |  |  | (12,414) |
Nonvested at the end of the period (in shares) | 515,471 |  |  | 515,471 |
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 |  |  |  | 73.64 |
Vested (in dollars per share) | $ / shares |  |  |  | 71.02 |
Forfeited (in dollars per share) | $ / shares |  |  |  | 73.54 |
Nonvested at the end of the period (in dollars per share) | $ / shares | $ 73.33 |  |  | $ 73.33 |
Stock options |  |  |  |  |
Stock-based Compensation |  |  |  |  |
Unrecognized compensation cost | $ | $ 700 |  |  | $ 700 |
Weighted-average period |  |  |  | 2 years 2 months 12 days |
Number of Options |  |  |  |  |
Outstanding at the beginning of the period (in shares) |  | 677,525 |  | 677,525 |
Granted (in shares) |  |  |  | 18,135 |
Exercised (in shares) |  |  |  | (49,395) |
Expired or forfeited (in shares) |  |  |  | (6,914) |
Outstanding at the end of the period (in shares) | 639,351 |  |  | 639,351 |
Exercisable at the end of the period (in shares) | 600,813 |  |  | 600,813 |
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 |  |  |  | 18.09 |
Expired or forfeited (in dollars per share) | $ / shares |  |  |  | 69.47 |
Outstanding at the end of the period (in dollars per share) | $ / shares | $ 34.67 |  |  | 34.67 |
Exercisable at the end of the period (in dollars per share) | $ / shares | $ 31.92 |  |  | $ 31.92 |
Weighted-Average Remaining Contractual Term |  |  |  |  |
Outstanding at the end of the period |  | 2 years 8 months 12 days |  |  |
Exercisable at the end of the period |  | 2 years 3 months 18 days |  |  |
Aggregate Intrinsic Value |  |  |  |  |
Outstanding at the end of the period | $ | $ 25,026 |  |  | $ 25,026 |
Exercisable at the end of the period | $ | $ 25,001 |  |  | $ 25,001 |
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, before taxes | $ | $ 150 |  | 247 | $ 356 | $ 487
Selling, general and administrative |  |  |  |  |
Stock-based Compensation |  |  |  |  |
Stock-based compensation expense, before taxes | $ | 7,833 |  | 5,849 | 12,945 | 10,960
Research and development |  |  |  |  |
Stock-based Compensation |  |  |  |  |
Stock-based compensation expense, before taxes | $ | $ 180 |  | $ 157 | $ 325 | $ 293

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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