CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 235,352	$ 241,053
Short-term investments	6,604	7,499
Accounts receivable, net of allowances of $4,230 and $4,102 at June 30, 2019 and December 31, 2018, respectively	240,056	228,405
Inventories	222,969	215,435
Assets held for sale	4,947
Prepaid expenses and other	46,726	42,446
Total current assets	756,654	734,838
Property, plant and equipment, net	470,690	446,835
Deferred income tax	28,751	31,652
Goodwill	138,772	132,437
Intangible assets, net	130,035	137,935
Other	89,257	42,674
Total assets	1,614,159	1,526,371
Current liabilities:
Line of credit	15,454	10,254
Accounts payable	110,521	117,808
Accrued liabilities and other	102,679	82,605
Income tax payable	16,769	15,744
Current portion of long-term debt	29,988	27,613
Total current liabilities	275,411	254,024
Long-term debt, net of current portion	141,919	186,143
Deferred tax liabilities	19,048	17,993
Other long-term liabilities	126,629	90,779
Total liabilities	563,007	548,939
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; 50,744,888 and 50,221,035, issued and outstanding at June 30, 2019 and December 31, 2018, respectively	34,803	34,454
Additional paid-in capital	414,451	399,915
Retained earnings	704,708	636,708
Treasury stock, at cost, 1,457,206 shares held at June 30, 2019 and December 31, 2018	(37,768)	(37,768)
Accumulated other comprehensive loss	(112,225)	(101,846)
Total stockholders' equity	1,003,969	931,463
Noncontrolling interest	47,183	45,969
Total equity	1,051,152	977,432
Total liabilities and stockholders' equity	$ 1,614,159	$ 1,526,371