CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 363,599	$ 268,065
Restricted cash	3,219	52,464
Short-term investments	6,542	6,142
Accounts receivable, net of allowances of $4,324 and $3,806 at December 31, 2021 and 2020, respectively	358,496	320,061
Inventories	348,622	307,062
Prepaid expenses and other current assets	107,194	70,193
Total current assets	1,187,672	1,023,987
Property, plant and equipment, net	582,079	530,815
Deferred income tax	21,256	57,841
Goodwill	149,890	158,331
Intangible assets, net	94,550	110,591
Other long-term assets	159,048	97,892
Total assets	2,194,495	1,979,457
Current liabilities:
Line of credit	18,068	140,563
Accounts payable	221,254	168,045
Accrued liabilities	184,649	160,117
Income tax payable	29,682	19,177
Current portion of long-term debt	17,381	21,860
Total current liabilities	471,034	509,762
Long-term debt, net of current portion	265,574	288,179
Deferred tax liabilities	32,230	34,598
Other long-term liabilities	122,933	130,795
Total liabilities	891,771	963,334
Commitments and contingencies (See Note 17)
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; 45,017,774 and 44,276,194, issued and outstanding at December 31, 2021 and 2020, respectively	36,195	35,692
Additional paid-in capital	471,649	449,598
Retained earnings	1,116,809	888,046
Treasury stock, at cost; 9,272,513 and 9,259,858, issued and outstanding at December 31, 2021 and 2020, respectively	(336,894)	(335,910)
Accumulated other comprehensive loss	(50,517)	(73,606)
Total stockholders' equity	1,237,242	963,820
Noncontrolling interest	65,482	52,303
Total equity	1,302,724	1,016,123
Total liabilities and stockholders' equity	$ 2,194,495	$ 1,979,457