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Equity Incentive Plan - Other (Details) $ / shares in Units, $ in Millions |  |  |  | 3 Months Ended | 12 Months Ended | 34 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 01, 2018 shares | Aug. 02, 2017 shares | Aug. 01, 2017 | Mar. 31, 2019 USD ($) $ / shares shares | Sep. 30, 2018 USD ($) $ / shares shares | Jun. 30, 2019 USD ($) $ / shares shares | Jun. 30, 2018 USD ($) item $ / shares shares | Jun. 30, 2017 USD ($) $ / shares shares | Jun. 30, 2016 USD ($) $ / shares shares | Jun. 30, 2018 USD ($) $ / shares shares | Jun. 30, 2019 USD ($) shares
Equity Incentive Market Based Restricted Stock Awards |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Performance shares |  |  |  |  |  | 6,800 |  |  |  |  | 6,800
Number of consecutive days considered for the computation of average closing stock prices |  |  |  |  |  |  |  | 30 days |  |  |
Granted (in shares) |  |  |  |  |  |  |  | 14.35 |  |  |
Vested (in shares) |  |  |  |  |  | (18,400) |  |  |  |  |
Nonvested at the end of the period (in shares) |  |  |  |  |  | 6,800 |  |  |  |  |
Restricted Stock |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | $ |  |  |  |  |  | $ 12.3 | $ 15.7 |  | $ 16.8 |  |
Fair value of share-based compensation awards granted in period | $ |  |  |  |  |  | 15.3 | 20.2 |  |  |  |
Fair value of share-based compensation awards vested in period | $ |  |  |  |  |  | $ 20.6 | $ 22.1 |  |  |  |
Performance shares |  |  |  |  | 1,676,907 | 1,676,907 | 2,141,047 | 2,131,790 | 2,131,790 | 1,676,907 | 1,322,552
Unrecognized compensation | $ |  |  |  |  |  |  |  |  |  |  | $ 14.4
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted |  |  |  |  |  | 1 year 6 months |  |  |  |  |
Nonvested at the beginning of the period (in shares) |  |  |  |  | 1,676,907 | 1,676,907 | 2,141,047 | 2,131,790 |  |  |
Granted (in shares) |  |  |  |  |  | 828,833 | 1,210,502 | 1,268,311 |  |  |
Vested (in shares) |  |  |  |  |  | (947,703) | (1,339,492) | (1,084,046) |  |  |
Forfeited or canceled (in shares) |  |  |  |  |  | (235,485) | (335,150) | (175,008) |  |  |
Nonvested at the end of the period (in shares) |  |  |  |  |  | 1,322,552 | 1,676,907 | 2,141,047 | 2,131,790 | 1,676,907 |
Nonvested at the beginning of the period (in dollars per share) | $ / shares |  |  |  |  | $ 15.12 | $ 15.12 | $ 12.34 | $ 12.46 |  |  |
Granted (in dollars per share) | $ / shares |  |  |  |  |  | 18.44 | 16.68 | 12.70 |  |  |
Vested (in dollars per share) | $ / shares |  |  |  |  |  | 14.72 | 12.29 | 12.94 |  |  |
Forfeited or canceled (in dollars per share) | $ / shares |  |  |  |  |  | 17.40 | 14.31 | 12.69 |  |  |
Nonvested at the end of the period (in dollars per share) | $ / shares |  |  |  |  |  | $ 17.08 | $ 15.12 | $ 12.34 | $ 12.46 | $ 15.12 |
Restricted Stock | Vesting Performance |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Performance shares |  |  |  |  |  | 271,455 |  |  |  |  | 271,455
Granted (in shares) |  |  |  |  |  | 37,378 |  |  |  |  |
Nonvested at the end of the period (in shares) |  |  |  |  |  | 271,455 |  |  |  |  |
Percentage of target that the stock awards were granted at | 100.00% |  |  |  |  |  |  |  |  |  |
Number of shares earned upon reaching performance threshold | 46,845 |  |  |  |  |  |  |  |  |  |
Restricted Stock | Service based awards |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Performance shares |  |  |  |  |  | 1,044,297 |  |  |  |  | 1,044,297
Granted (in shares) |  |  |  |  |  | 791,455 |  |  |  |  |
Vested (in shares) |  |  |  |  |  | (616,920) |  |  |  |  |
Nonvested at the end of the period (in shares) |  |  |  |  |  | 1,044,297 |  |  |  |  |
Performance Share Units |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | $ |  |  |  |  |  | $ 3.9 | $ 5.9 | $ 3.8 |  |  |
Performance shares |  |  |  |  | 708,979 | 708,979 | 1,043,602 | 1,089,602 | 1,089,602 | 708,979 | 2,372,241
Unrecognized compensation | $ |  |  |  |  |  |  |  |  |  |  | $ 13.4
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted |  |  |  |  |  | 2 years 2 months 12 days |  |  |  |  |
Nonvested at the beginning of the period (in shares) |  |  |  |  | 708,979 | 708,979 | 1,043,602 | 1,089,602 |  |  |
Granted (in shares) |  |  |  |  |  | 2,372,241 | 138,241 | 52,000 |  |  |
Vested (in shares) |  |  |  |  |  | (427,954) | (320,340) |  |  |  |
Forfeited or canceled (in shares) |  |  |  |  |  | (281,025) | (152,524) | (98,000) |  |  |
Nonvested at the end of the period (in shares) |  |  |  |  |  | 2,372,241 | 708,979 | 1,043,602 | 1,089,602 | 708,979 |
Nonvested at the beginning of the period (in dollars per share) | $ / shares |  |  |  |  | $ 13.15 | $ 13.15 | $ 13.16 | $ 12.91 |  |  |
Granted (in dollars per share) | $ / shares |  |  |  |  |  | 10.61 | 12.81 | 18.97 |  |  |
Vested (in dollars per share) | $ / shares |  |  |  |  |  | 13.24 | 12.62 |  |  |  |
Forfeited or canceled (in dollars per share) | $ / shares |  |  |  |  |  | 13.02 | 14.00 | 13.45 |  |  |
Nonvested at the end of the period (in dollars per share) | $ / shares |  |  |  |  |  | $ 10.61 | $ 13.15 | $ 13.16 | $ 12.91 | $ 13.15 |
Performance Share Units | 2019 SPP |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  | 1,766,932 |  |  |  |  |  |
Performance Share Units | Fiscal Year 2019 LTIP |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | $ |  |  |  |  |  | $ 0.0 |  |  |  |  |
Fair value | $ |  |  |  | $ 7.9 |  |  |  |  |  |  |
Granted (in shares) |  |  |  | 263,936 |  |  |  |  |  |  |
Granted (in dollars per share) | $ / shares |  |  |  | $ 30.05 |  |  |  |  |  |  |
Performance Share Units | Modification |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Fair value | $ |  |  |  |  | $ 0.4 |  |  |  |  |  |
Granted (in shares) |  |  |  |  | 23,670 |  |  |  |  |  |
Granted (in dollars per share) | $ / shares |  |  |  |  | $ 17.45 |  |  |  |  |  |
Performance Share Units | Vesting Performance |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Fair value | $ |  |  |  |  | $ 6.3 |  |  |  |  |  |
Granted (in shares) |  |  |  |  | 317,703 |  |  |  |  |  |
Granted (in dollars per share) | $ / shares |  |  |  |  | $ 19.76 |  |  |  |  |  |
Performance Shares Tranche #1 |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Percentage of MPS schools that were not in academic jeopardy |  |  | 97.00% |  |  |  |  |  |  |  |
Granted (in shares) |  | 446,221 |  |  |  |  |  |  |  |  |
Granted due to the Outperform level (in shares) |  | 138,241 |  |  |  |  |  |  |  |  |
Performance Shares Tranche #1 | Fiscal Year 2019 LTIP |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Earned award vesting percentage |  |  |  |  | 45.00% |  |  |  |  |  |
Performance Shares Tranche #1 | Quarterly Period Beginning November 15, 2017 |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Earned award vesting percentage |  |  |  |  |  |  |  |  | 30.00% |  |
Performance Shares Tranche #1 | Stock price performance target one |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | $ |  |  |  |  |  |  |  |  |  | $ 3.8 |
Earned award vesting percentage |  |  |  |  |  |  | 150.00% |  |  |  |
Performance Shares Tranche #2 |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Number of performance conditions achievement deemed probable | item |  |  |  |  |  |  | 1 |  |  |  |
Number of performance measures | item |  |  |  |  |  |  | 2 |  |  |  |
Stock based compensation expense | $ |  |  |  |  |  |  |  |  |  | $ 3.9 |
Percentage below target for academic measure | 1 |  |  |  |  |  |  |  |  |  |
Performance Shares Tranche #2 | Fiscal Year 2019 LTIP |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Earned award vesting percentage |  |  |  |  | 25.00% |  |  |  |  |  |
Performance Shares Tranche #2 | Period After August 15, 2018 |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Earned award vesting percentage |  |  |  |  |  |  |  |  | 70.00% |  |
Performance Shares Tranche #2 - Academic Measure |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) | 349,996 |  |  |  |  |  |  |  |  |  |
Reduction in shares due to below target performance (in shares) | 15,345 |  |  |  |  |  |  |  |  |  |
Performance Shares Tranche #3 | Fiscal Year 2019 LTIP |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Earned award vesting percentage |  |  |  |  | 30.00% |  |  |  |  |  |
Deferred Stock Units |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  | 18,258 |  |  |  |  |
Granted (in dollars per share) | $ / shares |  |  |  |  |  | $ 25.41 |  |  |  |  |
Nonvested at the end of the period (in dollars per share) | $ / shares |  |  |  |  |  | $ 18,258.00 |  |  |  |  |
Senior Executives | Performance Share Units | 2019 SPP |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Market capitalization growth performance period |  |  |  |  |  | 3 years |  |  |  |  |
Fair value | $ |  |  |  |  | $ 10.5 |  |  |  |  |  |
Threshold period average price of stock to determine final amount |  |  |  |  | 30 days |  |  |  |  |  |
Threshold days after release of fiscal year 2021 results to calculate average price of stock |  |  |  |  | 7 days |  |  |  |  |  |
Granted (in dollars per share) | $ / shares |  |  |  |  | $ 5.97 |  |  |  |  |  |
Senior Executives | Performance Share Units | Total stock price growth less than 25% | 2019 SPP |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Percentage of total stock price growth |  |  |  |  |  | 25.00% |  |  |  |  |
Annualized percentage of total stock price growth |  |  |  |  |  | 7.60% |  |  |  |  |
Senior Executives | Performance Share Units | Total stock price growth 33% |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Amount earned as percentage of total value growth |  |  |  |  |  | 6.00% |  |  |  |  |
Percentage of total stock price growth |  |  |  |  |  | 33.00% |  |  |  |  |
Senior Executives | Performance Share Units | Total stock price growth 33% | 2019 SPP |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Annualized percentage of total stock price growth |  |  |  |  |  | 10.00% |  |  |  |  |
Senior Executives | Performance Share Units | Total stock price growth equals or greater than 95% | 2019 SPP |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Amount earned as percentage of total value growth |  |  |  |  |  | 7.50% |  |  |  |  |
Percentage of total stock price growth |  |  |  |  |  | 95.00% |  |  |  |  |
Annualized percentage of total stock price growth |  |  |  |  |  | 25.00% |  |  |  |  |
Mr. Davis | Performance Shares Tranche #1 |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  | 90,000 |  |  |  |  |  |  |  |  |
Mr. Davis | Performance Shares Tranche #2 - Academic Measure |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Percentage below target for academic measure | 76,640 |  |  |  |  |  |  |  |  |  |
Mr. Udell | Performance Shares Tranche #1 |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  | 70,021 |  |  |  |  |  |  |  |  |
Mr. Udell | Performance Shares Tranche #2 - Academic Measure |  |  |  |  |  |  |  |  |  |  |
Equity Transactions |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) | 59,626 |  |  |  |  |  |  |  |  |  |

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