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Equity Incentive Plan - Other (Details) $ / shares in Units, $ in Millions	1 Months Ended				3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2022 shares	Oct. 31, 2021 shares	Sep. 17, 2021 employee $ / shares shares	Aug. 31, 2021 shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($)	Jun. 30, 2021 USD ($) item $ / shares shares	Jun. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2019 USD ($) $ / shares shares
2019 SPP
Equity Transactions
Vesting period											3 years
Fiscal Year 2021 LTIP
Equity Transactions
Number of metrics assumed to be achieved at threshold \| item									2
Threshold grant date fair value of metrics \| $									$ 0.2
Career Learning Revenue Performance Based Share Units
Equity Transactions
Granted (in shares)									366,250
Granted (in dollars per share) \| $ / shares									$ 45.05
Fair value \| $									$ 16.5
Career Learning Revenue Performance Based Share Units \| Fiscal Year 2021
Equity Transactions
Granted (in shares)									77,690
Vesting period									2 years
Career Learning Revenue Performance Based Share Units \| Fiscal Year 2022
Equity Transactions
Granted (in shares)									122,080
Career Learning Revenue Performance Based Share Units \| Fiscal Year 2023
Equity Transactions
Granted (in shares)									166,480
Career Learning Revenue Performance Based Share Units \| Vest immediately \| Fiscal Year 2021
Equity Transactions
Earned award vesting percentage									33.33%
Career Learning Revenue Performance Based Share Units \| Vest immediately \| Fiscal Year 2022
Equity Transactions
Earned award vesting percentage									66.67%
Career Learning Revenue Performance Based Share Units \| Vest annually over two years. \| Fiscal Year 2021
Equity Transactions
Earned award vesting percentage									66.67%
Career Learning Revenue Performance Based Share Units \| Vest the following year \| Fiscal Year 2022
Equity Transactions
Earned award vesting percentage									33.33%
Restricted Stock
Equity Transactions
Nonvested at the beginning of the period (in shares)	1,286,049						1,409,334
Granted (in shares)							426,693
Granted (in dollars per share) \| $ / shares							$ 35.96
Nonvested at the end of the period (in shares)					1,286,049		1,286,049		1,409,334
Vested (in shares)							457,758
Forfeited or canceled (in shares)							92,220
Vesting period							3 years
Unrecognized compensation \| $					$ 25.5		$ 25.5
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted							1 year 6 months
Fair value of share-based compensation awards granted in period \| $							$ 15.3	$ 17.5
Fair value of share-based compensation awards vested in period \| $							15.4	15.4
Stock based compensation expense \| $					$ 4.2	$ 5.6	$ 9.5	11.1
Restricted Stock \| Service based awards
Equity Transactions
Nonvested at the beginning of the period (in shares)	908,247
Granted (in shares)							399,400
Nonvested at the end of the period (in shares)					908,247		908,247
Vested (in shares)							250,026
Restricted Stock \| Vesting Based On Performance And Service
Equity Transactions
Nonvested at the beginning of the period (in shares)	377,802
Granted (in shares)							27,293
Nonvested at the end of the period (in shares)					377,802		377,802
Vested (in shares)							207,732
Performance Share Units
Equity Transactions
Number of shares of common stock each unit has the right to receive					1		1
Nonvested at the beginning of the period (in shares)	390,951						2,878,044
Granted (in shares)							346,880
Granted (in dollars per share) \| $ / shares							$ 34.90
Nonvested at the end of the period (in shares)					390,951		390,951		2,878,044
Vested (in shares)							1,810,752
Forfeited or canceled (in shares)							1,023,221
Unrecognized compensation \| $					$ 7.2		$ 7.2
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted							2 years 1 month 6 days
Stock based compensation expense \| $					$ (3.6)	3.4	$ (0.6)	6.8
Performance Share Units \| 2019 SPP
Equity Transactions
Granted (in shares)										66,934	2,108,305
Granted (in dollars per share) \| $ / shares										$ 12.56
Vested (in shares)			1,656,594
Number of named executive officers \| employee			6
Market capitalization growth (as a percent)			112.00%
Vesting period			3 years
Average price of Company stock during the performance period (in dollars per share) \| $ / shares			$ 34.13
Performance Share Units \| Fiscal Year 2019 LTIP
Equity Transactions
Granted (in shares)										34,030	263,936
Granted (in dollars per share) \| $ / shares										$ 23.51	$ 30.05
Vested (in shares)		115,223
Forfeited or canceled (in shares)		107,397
Fair value \| $										$ 0.8	$ 7.9
Threshold period average price of stock to determine final amount			30 days
Performance Share Units \| Fiscal Year 2020 TRIP
Equity Transactions
Fair value \| $										$ 12.3
Performance Share Units \| Fiscal Year 2021 MIP
Equity Transactions
Granted (in shares)					38,575
Performance Share Units \| Fiscal Year 2021 LTIP
Equity Transactions
Granted (in shares)									111,450
Granted (in dollars per share) \| $ / shares									$ 24.15
Fair value \| $									$ 2.7
Performance Share Units \| Fiscal Year 2022 LTIP
Equity Transactions
Granted (in shares)							250,250
Granted (in dollars per share) \| $ / shares							$ 36.30
Vesting period							3 years
Fair value \| $					$ 9.1		$ 9.1
Performance Share Units \| Tech Elevator
Equity Transactions
Stock based compensation expense \| $					$ 0.3	0.0	$ 0.7	0.0
Performance Share Units \| Tech Elevator \| Fiscal Year 2021 MIP
Equity Transactions
Intrinsic value of awards \| $									$ 4.0
Performance Share Units \| Revenue \| Fiscal Year 2020 TRIP
Equity Transactions
Earned award vesting percentage										60.00%
Performance Share Units \| EBITDA \| Fiscal Year 2020 TRIP
Equity Transactions
Earned award vesting percentage										40.00%
Performance Share Units \| Vest immediately \| Fiscal Year 2021 LTIP
Equity Transactions
Earned award vesting percentage									40.00%
Performance Share Units \| Vest annually over two years. \| Fiscal Year 2021 LTIP
Equity Transactions
Earned award vesting percentage									60.00%
Performance Shares Tranche #1 \| Fiscal Year 2019 LTIP
Equity Transactions
Earned award vesting percentage										45.00%
Performance Shares Tranche #1 \| Calendar Year 2021 \| Fiscal Year 2020 TRIP
Equity Transactions
Earned award vesting percentage										70.00%
Performance Shares Tranche #1 \| Vest immediately \| Fiscal Year 2022 LTIP
Equity Transactions
Earned award vesting percentage							50.00%
Performance Shares Tranche #1 \| Vest annually over two years. \| Fiscal Year 2022 LTIP
Equity Transactions
Earned award vesting percentage							50.00%
Performance Shares Tranche #2 \| Fiscal Year 2019 LTIP
Equity Transactions
Earned award vesting percentage										25.00%
Certified achievement percentage		193.00%
Performance Shares Tranche #2 \| Calendar Year 2022 \| Fiscal Year 2020 TRIP
Equity Transactions
Earned award vesting percentage										30.00%
Performance Shares Tranche #3 \| Fiscal Year 2019 LTIP
Equity Transactions
Earned award vesting percentage										30.00%
Time Based Award \| Tech Elevator \| Fiscal Year 2021 MIP
Equity Transactions
Vesting period									3 years
Intrinsic value of awards \| $									$ 4.0
Time Based Award \| Vest immediately \| Tech Elevator \| Fiscal Year 2021 MIP
Equity Transactions
Earned award vesting percentage									70.00%
Time Based Award \| Vest annually over two years. \| Tech Elevator \| Fiscal Year 2021 MIP
Equity Transactions
Earned award vesting percentage									30.00%
Deferred Stock Units
Equity Transactions
Nonvested at the beginning of the period (in shares)	59,354						59,354
Nonvested at the end of the period (in shares)					59,354		59,354		59,354
Unrecognized compensation \| $					$ 0.0		$ 0.0
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted							0 years
Stock based compensation expense \| $					$ 0.1	$ 0.1	$ 0.2	$ 0.2
Chief Executive Officer And Executive Chairman \| Performance Share Units
Equity Transactions
Granted (in shares)										358,294
Granted (in dollars per share) \| $ / shares										$ 27.91
Chief Executive Officer And Executive Chairman \| Performance Share Units \| Vesting Based on Performance
Equity Transactions
Vesting in first subsequent fiscal year (as a percent)										66.67%
Vesting in second subsequent fiscal year (as a percent)										33.33%
Chief Executive Officer And Executive Chairman \| Performance Shares Tranche #1
Equity Transactions
Amortization period										3 years
Chief Executive Officer And Executive Chairman \| Performance Shares Tranche #2
Equity Transactions
Granted (in shares)				119,431
Senior Executives \| Performance Share Units \| 2019 SPP
Equity Transactions
Granted (in dollars per share) \| $ / shares											$ 8.18
Market capitalization growth performance period										3 years
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
Senior Executives \| Performance Share Units \| Total stock price growth less than 25% \| 2019 SPP
Equity Transactions
Amount earned as percentage of total value growth											0.00%
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% \| 2019 SPP
Equity Transactions
Amount earned as percentage of total value growth											6.00%
Percentage of total stock price growth											33.00%
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%
Chief Executive Officer \| Performance Share Units \| Vest immediately upon achievement of the performance goals
Equity Transactions
Earned award vesting percentage	33.33%
Chief Executive Officer \| Performance Share Units \| Vest annually over two years
Equity Transactions
Earned award vesting percentage	66.67%
Vesting period	2 years
Chief Executive Officer \| Performance Share Units \| Vesting Based on Performance
Equity Transactions
Granted (in shares)									30,364
Granted (in dollars per share) \| $ / shares									$ 24.70
Chief Executive Officer \| Performance Share Units \| Vesting Based On Performance And Service
Equity Transactions
Certified achievement percentage	133.00%
Number of shares earned upon reaching performance threshold	10,020
Executive Officers \| Performance Share Units \| Vest immediately upon achievement of the performance goals
Equity Transactions
Earned award vesting percentage				33.33%
Executive Officers \| Performance Share Units \| Vest annually over two years
Equity Transactions
Earned award vesting percentage				66.67%
Vesting period				2 years
Executive Officers \| Performance Share Units \| Vesting Based on Performance
Equity Transactions
Granted (in shares)									82,710
Granted (in dollars per share) \| $ / shares									$ 45.33
Executive Officers \| Performance Share Units \| Vesting Based On Performance And Service
Equity Transactions
Certified achievement percentage				133.00%
Number of shares earned upon reaching performance threshold				27,293