Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities
Net income	$ 164,807	$ 277,742
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	178,578	157,629
Amortization of operating lease assets	136,052	117,622
Deferred income tax provision	53,857	(15,146)
Impairment, closure costs, and asset disposals	21,198	10,216
Provision for credit losses	(143)	85
Stock-based compensation expense	60,579	65,657
Other	2,450	(3,044)
Changes in operating assets and liabilities:
Accounts receivable	29,233	19,039
Inventory	614	(2,312)
Prepaid expenses and other current assets	(6,015)	(17,514)
Other assets	(21,754)	2,864
Accounts payable	5,776	(4,162)
Accrued payroll and benefits	68,514	30,471
Accrued liabilities	1,965	25,552
Unearned revenue	(593)	(8,665)
Income tax payable/receivable	(32,677)	(8,985)
Operating lease liabilities	(115,069)	(112,478)
Other long-term liabilities	1,351	472
Net cash provided by operating activities	548,723	535,043
Investing activities
Purchases of leasehold improvements, property and equipment	(246,758)	(237,965)
Purchases of investments	(325,069)	(328,107)
Maturities of investments	318,505	328,448
Acquisitions of equity method investments	(10,025)	0
Net cash used in investing activities	(263,347)	(237,624)
Financing activities
Acquisition of treasury stock	(54,401)	(151,621)
Tax withholding on stock-based compensation awards	(47,976)	(10,420)
Other financing activities	(1,865)	(665)
Net cash used in financing activities	(104,242)	(162,706)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	377	397
Net change in cash, cash equivalents, and restricted cash	181,511	135,110
Cash, cash equivalents, and restricted cash at beginning of period	508,481	280,152
Cash, cash equivalents, and restricted cash at end of period	689,992	415,262
Supplemental disclosures of cash flow information
Income taxes (refunded)	(8,987)
Income taxes paid		103,439
Purchases of leasehold improvements, property, and equipment accrued in accounts payable and accrued liabilities	72,860	40,250
Acquisition of treasury stock accrued in accounts payable and accrued liabilities	$ 0	$ 748