CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 503,206	$ 258,390
Short-term investments	3,652	4,825
Accounts receivable, net of allowances of $3,234 and $4,866 at June 30, 2020 and December 31, 2019, respectively	268,618	260,322
Inventories	255,828	236,472
Prepaid expenses and other	95,181	49,950
Total current assets	1,126,485	809,959
Property, plant and equipment, net	450,615	469,574
Deferred income tax	18,113	17,516
Goodwill	152,140	141,318
Intangible assets, net	118,076	119,523
Other long-term assets	71,734	81,494
Total assets	1,937,163	1,639,384
Current liabilities:
Line of credit	63,668	13,342
Accounts payable	138,692	122,148
Accrued liabilities and other	103,859	100,571
Income tax payable	6,064	16,156
Current portion of long-term debt	13,052	33,105
Total current liabilities	325,335	285,322
Long-term debt, net of current portion	282,271	64,401
Deferred tax liabilities	16,244	16,333
Other long-term liabilities	117,686	120,545
Total liabilities	741,536	486,601
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; 51,598,528 and 51,206,969, issued and outstanding at June 30, 2020 and December 31, 2019, respectively	35,389	35,111
Additional paid-in capital	433,989	427,262
Retained earnings	831,159	789,958
Treasury stock at cost, 1,482,915 and 1,457,206, at June 30, 2020 and December 31, 2019, respectively	(38,660)	(37,768)
Accumulated other comprehensive loss	(118,492)	(108,139)
Total stockholders' equity	1,143,385	1,106,424
Noncontrolling interest	52,242	46,359
Total equity	1,195,627	1,152,783
Total liabilities and stockholders' equity	$ 1,937,163	$ 1,639,384