CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income		$ 725,694	$ 312,861	$ 119,497
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		31,976	27,619	24,213
Operating lease cost		58,283	61,583	60,142
Inventory donations		1,264	8,994	109
Provision (recovery) for doubtful accounts, net		(2,629)	5,779	1,566
Share-based compensation		38,122	16,361	14,412
Asset impairments		0	21,071	0
Deferred taxes		(241,283)	(325,061)	(16,259)
Other non-cash items		264	5,307	(2,425)
Changes in operating assets and liabilities:
Accounts receivable, net of allowances		(35,063)	(47,045)	(15,015)
Inventories		(43,063)	(13,462)	(48,156)
Prepaid expenses and other assets		(6,212)	5,007	(4,012)
Accounts payable		34,868	23,229	6,032
Accrued expenses and other liabilities		38,448	22,358	13,265
Right-of-use assets and operating lease liabilities		(52,752)	(61,178)	(64,313)
Income taxes		19,248	203,479	902
Cash provided by operating activities		567,165	266,902	89,958
Cash flows from investing activities:
Purchases of property, equipment, and software		(55,916)	(42,033)	(36,576)
Proceeds from disposal of property and equipment		6	463	616
Other		(15)	(192)	(276)
Cash used in investing activities		(55,925)	(41,762)	(36,236)
Cash flows from financing activities:
Proceeds from notes issuance		700,000	0	0
Proceeds from bank borrowings		390,000	210,000	315,000
Repayments of bank borrowings		(485,000)	(235,000)	(230,000)
Deferred debt issuance costs		(14,755)	(518)	(1,796)
Dividends — Series A convertible preferred stock	[1]	0	0	(2,985)
Repurchases of common stock		(1,000,000)	(170,832)	(147,190)
Repurchases of common stock for tax withholding		(20,119)	(3,060)	(1,527)
Other		236	1,372	(140)
Cash used in financing activities		(429,638)	(198,038)	(68,638)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash		(3,950)	126	(569)
Net change in cash, cash equivalents, and restricted cash		77,652	27,228	(15,485)
Cash, cash equivalents, and restricted cash — beginning of year		139,273	112,045	127,530
Cash, cash equivalents, and restricted cash — end of year		216,925	139,273	112,045
Supplemental Schedule of Non-Cash Investing and Financing Activities
Cash paid for interest		10,210	6,658	7,519
Cash paid for income taxes		159,680	20,816	16,050
Accrued purchases of property, equipment, and software		$ 15,831	$ 4,222	$ 15,206

[1] Represents $3.0 million paid to induce conversion of Series A Convertible Preferred Stock to common stock during the year ended December 31, 2019.