CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 280,543	$ 268,065
Restricted cash	4,295	52,464
Short-term investments	7,364	6,142
Accounts receivable, net of allowances of $3,887 and $3,806 at September 30, 2021 and December 31, 2020, respectively	348,688	320,061
Inventories	322,088	307,062
Prepaid expenses and other	100,905	70,193
Total current assets	1,063,883	1,023,987
Property, plant and equipment, net	540,520	530,815
Deferred income tax	52,436	57,841
Goodwill	149,592	158,331
Intangible assets, net	98,570	110,591
Other long-term assets	136,908	97,892
Total assets	2,041,909	1,979,457
Current liabilities:
Lines of credit	15,690	140,563
Accounts payable	195,098	168,045
Accrued liabilities and other	179,908	160,117
Income tax payable	35,525	19,177
Current portion of long-term debt	18,404	21,860
Total current liabilities	444,625	509,762
Long-term debt, net of current portion	218,000	288,179
Deferred tax liabilities	34,729	34,598
Other long-term liabilities	127,442	130,795
Total liabilities	824,796	963,334
Commitments and contingencies (See Note 9)
Stockholders' equity
Preferred stock - par value $1.00 per share; 1,000,000 shares authorized; no shares issued or outstanding
Common stock - par value $0.66 2/3 per share; 70,000,000 shares authorized; and 45,028,508 shares and 44,276,194 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	36,194	35,692
Additional paid-in capital	463,748	449,598
Retained earnings	1,051,296	888,046
Treasury stock at cost, 9,272,513 shares at September 30, 2021 and 9,259,858 shares at December 31, 2020	(336,894)	(335,910)
Accumulated other comprehensive loss	(58,281)	(73,606)
Total stockholders' equity	1,156,063	963,820
Noncontrolling interest	61,050	52,303
Total equity	1,217,113	1,016,123
Total liabilities and stockholders' equity	$ 2,041,909	$ 1,979,457