Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows provided by operating activities:
Net income	$ 113,164	$ 102,888
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	7,117	7,479
Depreciation and amortization	15,260	13,581
Amortization of intangible assets	4,210	4,210
Deferred income taxes	1,657	266
Other, including fixed asset disposals	(602)	(457)
Changes in assets and liabilities:
Accounts receivable from university partners	55,249	49,357
Other assets	(4,732)	(749)
Right-of-use assets and lease liabilities	379	759
Accounts payable	(2,605)	4,986
Accrued liabilities	3,014	8,334
Income taxes receivable/payable	(14,622)	(14,344)
Deferred revenue	14,150	7,216
Net cash provided by operating activities	191,639	183,526
Cash flows used in investing activities:
Capital expenditures	(17,561)	(17,933)
Additions of amortizable content	(28)	(170)
Purchase of equity investment	(1,000)
Loss on equity investment	500
Purchases of investments	(191,666)	(48,594)
Proceeds from sale or maturity of investments	11,007	46,708
Net cash used in investing activities	(198,748)	(19,989)
Cash flows used in financing activities:
Repurchase of common shares and shares withheld in lieu of income taxes	(125,236)	(68,695)
Net cash used in financing activities	(125,236)	(68,695)
Net (decrease) increase in cash and cash equivalents and restricted cash	(132,345)	94,842
Cash and cash equivalents and restricted cash, beginning of period	324,623	146,475
Cash and cash equivalents and restricted cash, end of period	192,278	241,317
Supplemental disclosure of cash flow information
Cash paid for interest		4
Cash paid for income taxes	44,476	44,220
Supplemental disclosure of non-cash investing and financing activities
Purchases of property and equipment included in accounts payable	1,302	1,713
ROU Asset and Liability recognition		9,439
Excise tax on treasury stock repurchases	$ 1,087	$ 422