UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 7,029	$ 9,577
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred financing costs	138	138
Amortization of investment discount/premium	15	24
Depreciation and amortization	16,272	34,571
Deferred income taxes	(4,955)	(8,898)
Stock-based compensation	5,068	3,900
Impairment of right-of-use lease assets	0	14,388
Changes in assets and liabilities:
Tuition receivable, net	(12,669)	(13,417)
Other assets	(6,374)	(9,897)
Accounts payable and accrued expenses	2,972	(10,276)
Income taxes payable and income taxes receivable	9,660	12,777
Contract liabilities	41,012	46,872
Other liabilities	(1,573)	(978)
Net cash provided by operating activities	56,595	78,781
Cash flows from investing activities:
Purchases of property and equipment	(9,686)	(12,650)
Proceeds from marketable securities	1,100	1,930
Other investments	(175)	(72)
Net cash used in investing activities	(8,761)	(10,792)
Cash flows from financing activities:
Common dividends paid	(15,018)	(14,778)
Net payments for stock awards	(2,849)	(2,326)
Repurchase of common stock	(3,961)	0
Net cash used in financing activities	(21,828)	(17,104)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	2,097	(866)
Net increase in cash, cash equivalents, and restricted cash	28,103	50,019
Cash, cash equivalents, and restricted cash — beginning of period	279,212	202,020
Cash, cash equivalents, and restricted cash — end of period	307,315	252,039
Non-cash transactions:
Non-cash additions to property and equipment	5,111	7,526
Right-of-use lease assets obtained in exchange for operating lease liabilities	$ 418	$ 46,147