CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities
Net income	$ 99,179	$ 41,788
Adjustments to reconcile net income to net cash provided by operating activities, net of effects of acquisitions
Depreciation	53,105	45,685
Amortization of intangible assets	8,083	8,242
Share-based compensation expense	14,764	12,394
Deferred income taxes	1,194	(2,317)
Investment gain	(9,075)
Other	287	1,084
Changes in operating assets:
Change in accounts receivable	(17,060)	(7,573)
Change in inventory	(2,451)	(19,770)
Change in other operating assets	(5,597)	7,422
Changes in operating liabilities:
Change in accounts payable	19,456	16,767
Change in accrued liabilities	4,706	(6,429)
Change in income tax payable	(2,332)	(10,159)
Change in other operating liabilities	(2,195)	(400)
Net cash flows provided by operating activities	162,064	86,734
Cash flows from investing activities
Acquisitions, net of cash received		591
Purchases of property, plant and equipment	(45,037)	(30,728)
Proceeds from sale of property, plant and equipment	3,042	174
Proceeds from maturity of short-term investments	4,020	6,186
Purchases of short-term investments	(5,160)	(5,051)
Additional acquisition of noncontrolling interests	(71)	(6,130)
Other	6,532	910
Net cash and cash equivalents used in investing activities	(36,674)	(34,048)
Cash flows from financing activities
Advances on lines of credit and short-term debt	6,404	53,647
Repayments of lines of credit and short-term debt	(88,307)	(3,498)
Proceeds from long-term debt	315,006	589,331
Repayments of long-term debt	(384,554)	(390,334)
Net proceeds from issuance of common stock	2,103	1,066
Repayment of and proceeds from finance lease obligation	(151)	(445)
Taxes paid related to net share settlement	(10,046)	(5,405)
Dividend distribution to noncontrolling interests	(250)	(108)
Capital contribution from noncontrolling interests	4,003
Other	(500)	(2,470)
Net cash and cash equivalents (used in) provided by financing activities	(156,292)	241,784
Effect of exchange rate changes on cash and cash equivalents	5,291	644
Change in cash and cash equivalents, including restricted cash	(25,611)	295,114
Cash and cash equivalents, beginning of period, including restricted cash	320,529	259,507
Cash and cash equivalents, end of period, including restricted cash	294,918	554,621
Supplemental Cash Flow Information
Interest paid during the period	4,545	1,746
Taxes paid during the period	23,904	21,743
Non-cash investing and financing activities:
Accounts payable balance related to the purchase of property, plant and equipment	$ 16,081	7,569
Dividend payable to noncontrolling interest		$ 1,454