CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 292,650	$ 268,065
Restricted cash	2,268	52,464
Short-term investments	7,386	6,142
Accounts receivable, net of allowances of $3,822 and $3,806 at June 30, 2021 and December 31, 2020, respectively	339,142	320,061
Inventories	304,128	307,062
Prepaid expenses and other	96,904	70,193
Total current assets	1,042,478	1,023,987
Property, plant and equipment, net	522,182	530,815
Deferred income tax	52,249	57,841
Goodwill	159,584	158,331
Intangible assets, net	102,677	110,591
Other long-term assets	113,799	97,892
Total assets	1,992,969	1,979,457
Current liabilities:
Lines of credit	60,239	140,563
Accounts payable	181,919	168,045
Accrued liabilities and other	182,385	160,117
Income tax payable	17,316	19,177
Current portion of long-term debt	18,346	21,860
Total current liabilities	460,205	509,762
Long-term debt, net of current portion	222,712	288,179
Deferred tax liabilities	34,761	34,598
Other long-term liabilities	132,294	130,795
Total liabilities	849,972	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; 44,730,897 and 44,276,194, issued and outstanding at June 30, 2021 and December 31, 2020, respectively	35,998	35,692
Additional paid-in capital	455,683	449,598
Retained earnings	982,872	888,046
Treasury stock at cost, 9,262,833 shares at June 30, 2021 and 9,259,858 shares at December 31, 2020	(336,128)	(335,910)
Accumulated other comprehensive loss	(55,841)	(73,606)
Total stockholders' equity	1,082,584	963,820
Noncontrolling interest	60,413	52,303
Total equity	1,142,997	1,016,123
Total liabilities and stockholders' equity	$ 1,992,969	$ 1,979,457