UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 22,249	$ 29,553
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred financing costs	276	276
Amortization of investment discount/premium	28	40
Depreciation and amortization	33,436	66,624
Deferred income taxes	(4,909)	(10,499)
Stock-based compensation	10,597	8,068
Impairment of right-of-use lease assets	1,121	17,015
Changes in assets and liabilities:
Tuition receivable, net	(25,162)	(28,947)
Other assets	(2,354)	(9,308)
Accounts payable and accrued expenses	(8,113)	(7,835)
Income taxes payable and income taxes receivable	4,913	5,444
Contract liabilities	51,901	58,937
Other liabilities	(3,307)	(3,537)
Net cash provided by operating activities	80,676	125,831
Cash flows from investing activities:
Purchases of property and equipment	(22,688)	(23,138)
Proceeds from marketable securities	2,100	5,595
Other investments	(223)	(262)
Net cash used in investing activities	(20,811)	(17,805)
Cash flows from financing activities:
Common dividends paid	(29,886)	(29,549)
Net payments for stock awards	(2,881)	(2,283)
Repurchase of common stock	(24,972)	(2,904)
Net cash used in financing activities	(57,739)	(34,736)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(4,981)	(1,396)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(2,855)	71,894
Cash, cash equivalents, and restricted cash — beginning of period	279,212	202,020
Cash, cash equivalents, and restricted cash — end of period	276,357	273,914
Non-cash transactions:
Non-cash additions to property and equipment	1,239	6,600
Right-of-use lease assets obtained in exchange for operating lease liabilities	$ 1,518	$ 48,143