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Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 535,710 | $ 522,954
Digital |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 325,048 | 303,225
Print |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 210,662 | 219,729
Re-occurring Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 387,614 | 361,798
Transactional Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 148,096 | 161,156
Operating Segments | K-12 |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 270,931 | 274,827
Operating Segments | Higher Education |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 182,379 | 159,846
Operating Segments | Global Professional |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 35,159 | 35,287
Operating Segments | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 51,464 | 58,311
Operating Segments | Digital | K-12 |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 108,597 | 99,618
Operating Segments | Digital | Higher Education |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 168,826 | 153,955
Operating Segments | Digital | Global Professional |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 25,272 | 25,093
Operating Segments | Digital | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 22,353 | 24,559
Operating Segments | Print | K-12 |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 162,334 | 175,209
Operating Segments | Print | Higher Education |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 13,553 | 5,891
Operating Segments | Print | Global Professional |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 9,887 | 10,194
Operating Segments | Print | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 29,111 | 33,752
Operating Segments | Re-occurring Revenue | K-12 |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 183,641 | 166,819
Operating Segments | Re-occurring Revenue | Higher Education |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 159,552 | 149,454
Operating Segments | Re-occurring Revenue | Global Professional |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 23,657 | 22,773
Operating Segments | Re-occurring Revenue | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 20,764 | 22,752
Operating Segments | Transactional Revenue | K-12 |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 87,290 | 108,008
Operating Segments | Transactional Revenue | Higher Education |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 22,827 | 10,392
Operating Segments | Transactional Revenue | Global Professional |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 11,502 | 12,514
Operating Segments | Transactional Revenue | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 30,700 | 35,559
Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | (4,223) | (5,317)
Other | Digital |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 0 | 0
Other | Print |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | (4,223) | (5,317)
Other | Re-occurring Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 0 | 0
Other | Transactional Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | $ (4,223) | $ (5,317)

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