Segment Reporting - Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Revenues
Revenues	$ 258,855	$ 290,336
Income (loss) from operations
Income (loss) from operations	13,441	12,000
Amortization of intangible assets	(3,738)	(19,407)
Merger and integration costs	(410)	(1,012)
Restructuring costs	(1,858)	(18,267)
U.S. Higher Education
Revenues
Revenues	195,766	226,547
Income (loss) from operations
Income (loss) from operations	15,483	47,754
Australia / New Zealand
Revenues
Revenues	48,512	51,265
Income (loss) from operations
Income (loss) from operations	(749)	(2,949)
Education Technology Services
Revenues
Revenues	14,577	12,524
Income (loss) from operations
Income (loss) from operations	$ 4,713	$ 5,881

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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