CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 150,274	$ 203,820
Short-term investments	7,280	4,558
Accounts receivable, net of allowances of $3,480 and $4,480 at September 30, 2018 and December 31, 2017, respectively	228,065	200,112
Inventories	219,146	216,506
Prepaid expenses and other	42,804	37,328
Total current assets	647,569	662,324
Property, plant and equipment, net	454,086	459,169
Deferred income tax	44,000	40,580
Goodwill	132,910	134,187
Intangible assets, net	142,487	156,445
Other	46,732	35,968
Total assets	1,467,784	1,488,673
Current liabilities:
Line of credit	12,283	1,008
Accounts payable	117,118	108,001
Accrued liabilities and other	92,039	99,301
Income tax payable	14,145	18,216
Current portion of long-term debt	26,285	20,636
Total current liabilities	261,870	247,162
Long-term debt, net of current portion	139,987	247,492
Deferred tax liabilities	26,308	25,176
Other long-term liabilities	87,168	94,925
Total liabilities	515,333	614,755
Commitments and contingencies (See Note 8)
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; 50,190,959 and 49,130,090, issued and outstanding at September 30, 2018 and December 31, 2017, respectively	34,433	33,727
Additional paid-in capital	395,412	386,338
Retained earnings	607,189	532,687
Treasury stock, at cost, 1,457,206 shares held at September 30, 2018 and December 31, 2017	(37,768)	(37,768)
Accumulated other comprehensive loss	(91,598)	(83,480)
Total stockholders' equity	907,668	831,504
Noncontrolling interest	44,783	42,414
Total equity	952,451	873,918
Total liabilities and stockholders' equity	$ 1,467,784	$ 1,488,673