Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows provided by operating activities:
Net income	$ 124,276	$ 113,648
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	9,958	9,484
Depreciation and amortization	16,994	17,023
Amortization of intangible assets	6,315	6,315
Deferred income taxes	517	368
Other, including fixed asset impairments	(134)	1,013
Changes in assets and liabilities:
Accounts receivable from university partners	(27,062)	(31,107)
Other assets	(1,154)	(1,288)
Right-of-use assets and lease liabilities	1,404	700
Accounts payable	3,894	(5,768)
Accrued liabilities	(910)	2,162
Income taxes receivable/payable	(13,058)	(8,172)
Deferred revenue	6,237	6,092
Net cash provided by operating activities	127,277	110,470
Cash flows used in investing activities:
Capital expenditures	(34,186)	(26,301)
Additions of amortizable content	(809)	(294)
Purchases of investments	(73,462)	(132,096)
Proceeds from sale or maturity of investments	37,927	63,373
Net cash used in investing activities	(70,530)	(95,318)
Cash flows used in financing activities:
Repurchase of common shares and shares withheld in lieu of income taxes	(120,285)	(576,206)
Net cash used in financing activities	(120,285)	(576,206)
Net decrease in cash and cash equivalents and restricted cash	(63,538)	(561,054)
Cash and cash equivalents and restricted cash, beginning of period	120,409	600,941
Cash and cash equivalents and restricted cash, end of period	56,871	39,887
Supplemental disclosure of cash flow information
Cash paid for interest	27	5
Cash paid for income taxes	47,654	41,118
Supplemental disclosure of non-cash investing and financing activities
Purchases of property and equipment included in accounts payable	927	1,827
ROU Asset and Liability recognition	17,674	$ 17,434
Excise tax on treasury stock repurchases	$ 978