CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 241,053	$ 203,820
Short-term investments	7,499	4,558
Accounts receivable, net of allowances of $4,102 and $4,480 at December 31, 2018 and December 31, 2017, respectively	228,405	200,112
Inventories	215,435	216,506
Prepaid expenses and other current assets	42,446	37,328
Total current assets	734,838	662,324
Property, plant and equipment, net	446,835	459,169
Deferred income tax	31,652	40,580
Goodwill	132,437	134,187
Intangible assets, net	137,935	156,445
Other long-term assets	42,674	35,968
Total assets	1,526,371	1,488,673
Current liabilities:
Line of credit	10,254	1,008
Accounts payable	117,808	108,001
Accrued liabilities	82,605	99,301
Income tax payable	15,744	18,216
Current portion of long-term debt	27,613	20,636
Total current liabilities	254,024	247,162
Long-term debt, net of current portion	186,143	247,492
Deferred tax liabilities	17,993	25,176
Other long-term liabilities	90,779	94,925
Total liabilities	548,939	614,755
Commitments and contingencies (See Note 16)
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; 50,221,035 and 49,130,090, issued and outstanding at December 31, 2018 and December 31, 2017, respectively	34,454	33,727
Additional paid-in capital	399,915	386,338
Retained earnings	636,708	532,687
Treasury stock, at cost, 1,457,206 shares held at December 31, 2018 and December 31, 2017	(37,768)	(37,768)
Accumulated other comprehensive loss	(101,846)	(83,480)
Total stockholders' equity	931,463	831,504
Noncontrolling interest	45,969	42,414
Total equity	977,432	873,918
Total liabilities and stockholders' equity	$ 1,526,371	$ 1,488,673