Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income (loss)	$ (2,028)	$ 7,029
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Amortization of deferred financing costs	138	138
Amortization of investment discount/premium	3	15
Depreciation and amortization	14,651	16,272
Deferred income taxes	1,872	(4,955)
Stock-based compensation	5,632	5,068
Impairment of right-of-use lease assets	3,649	0
Changes in assets and liabilities:
Tuition receivable, net	(8,892)	(12,669)
Other assets	(10,891)	(6,374)
Accounts payable and accrued expenses	1,831	2,972
Income taxes payable and income taxes receivable	(4,613)	9,660
Contract liabilities	34,035	41,012
Other liabilities	(145)	(1,573)
Net cash provided by operating activities	35,242	56,595
Cash flows from investing activities:
Purchases of property and equipment	(8,270)	(9,686)
Purchases of marketable securities	(17,103)	0
Proceeds from marketable securities	1,960	1,100
Proceeds from other investments	457	0
Other investments	(118)	(175)
Cash paid for acquisition, net of cash acquired	(211)	0
Net cash used in investing activities	(23,285)	(8,761)
Cash flows from financing activities:
Common dividends paid	(14,755)	(15,018)
Net payments for stock awards	(4,964)	(2,849)
Repurchase of common stock	0	(3,961)
Net cash used in financing activities	(19,719)	(21,828)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(887)	2,097
Net increase (decrease) in cash, cash equivalents, and restricted cash	(8,649)	28,103
Cash, cash equivalents, and restricted cash — beginning of period	227,454	279,212
Cash, cash equivalents, and restricted cash — end of period	218,805	307,315
Non-cash transactions:
Non-cash additions to property and equipment	1,447	5,111
Right-of-use lease assets obtained in exchange for operating lease liabilities	$ 5,124	$ 418