Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income (loss)	$ (589,681)	$ 22,477
Adjustments to reconcile net income (loss) to net cash used in operating activities
Depreciation and amortization	48,565	46,464
Unrealized foreign currency exchange rate gain (loss)	12,976	(1,725)
Loss on disposal of property and equipment	129	1,008
Impairment charges	437,517	0
Amortization of bond premium	63	63
Stock-based compensation	10,465	12,493
Deferred income taxes	23,253	(1,514)
Changes in reserves and allowances	10,130	(9,655)
Changes in operating assets and liabilities:
Accounts receivable	27,596	(87,042)
Inventories	(59,701)	156,880
Prepaid expenses and other assets	27,153	54,198
Other non-current assets	(336,357)	21,594
Accounts payable	(192,651)	(178,428)
Accrued expenses and other liabilities	226,315	(99,505)
Customer refund liability	(8,334)	(32,168)
Income taxes payable and receivable	(4,150)	5,071
Net cash used in operating activities	(366,712)	(89,789)
Cash flows from investing activities
Purchases of property and equipment	(31,498)	(35,911)
Purchases of other assets	0	0
Purchase of businesses	(37,343)	0
Net cash used in investing activities	(68,841)	(35,911)
Cash flows from financing activities
Proceeds from long term debt and revolving credit facility	700,000	25,000
Payments on long term debt and revolving credit facility	(100,000)	(161,250)
Cash paid for hedge settlement	0	(1,566)
Employee taxes paid for shares withheld for income taxes	(2,732)	(3,077)
Proceeds from exercise of stock options and other stock issuances	1,649	2,232
Payments of debt financing costs	0	(3,024)
Other financing fees	35	50
Net cash provided by (used in) financing activities	598,952	(141,635)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	8,761	(569)
Net increase in (decrease in) cash, cash equivalents and restricted cash	172,160	(267,904)
Cash, cash equivalents and restricted cash
Beginning of period	796,008	566,060
End of period	968,168	298,156
Non-cash investing and financing activities
Change in accrual for property and equipment	$ (13,081)	$ (8,979)