CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net income	$ 69,174	$ 106,561
Adjustments to reconcile net income to net cash provided by operating activities, net of effects of acquisitions
Depreciation	68,168	68,533
Amortization of intangible assets	12,249	13,539
Share-based compensation expense	18,684	15,364
Deferred income taxes	(10,232)	(612)
Other	1,235	(976)
Changes in operating assets:
Accounts receivable	602	(29,868)
Inventory	(20,535)	(9,062)
Other operating assets	2,903	(3,452)
Changes in operating liabilities:
Accounts payable	3,886	236
Accrued liabilities	(6,821)	10,206
Income tax payable	(11,013)	9,853
Other operating liabilities	(1,865)	(2,617)
Net cash flows provided by operating activities	126,435	177,705
Cash flows from investing activities
Acquisitions, net of cash received	591	(33,029)
Purchases of property, plant and equipment	(48,497)	(76,128)
Proceeds from maturity of short-term investments	7,723	15,332
Purchases of short-term investments	(5,858)	(15,921)
Additional acquisition of noncontrolling interest	(6,130)
Other	395	(430)
Net cash and cash equivalents used in investing activities	(51,776)	(110,176)
Cash flows from financing activities
Advances on lines of credit and short-term debt	60,647	9,954
Repayments of line of credit and short-term debt	(3,667)	(3,067)
Taxes paid related to net share settlement	(8,243)	(4,383)
Proceeds from long-term debt	726,363	278,237
Repayments of long-term debt	(477,659)	(372,976)
Net proceeds from issuance of common stock	1,977	7,208
Repayment of and proceeds from finance lease obligation	(671)	(912)
Dividend distribution to noncontrolling interests	(1,565)	(2,577)
Other	(2,502)	1,524
Net cash and cash equivalents provided by (used in) financing activities	294,680	(86,992)
Effect of exchange rate changes on cash and cash equivalents	10,988	(2,614)
Change in cash and cash equivalents, including restricted cash	380,327	(22,077)
Cash and cash equivalents, beginning of period, including restricted cash	259,507	241,833
Cash and cash equivalents, end of period, including restricted cash	639,834	219,756
Supplemental Cash Flow Information
Interest paid during the period	6,434	5,781
Taxes paid during the period	42,928	24,422
Non-cash investing and financing activities:
Accounts payable balance related to the purchase of property, plant and equipment	$ 8,906	$ 13,261