CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 301,167	$ 241,053
Short-term investments	6,751	7,499
Accounts receivable, net of allowances of $4,258 and $4,102 at March 31, 2019 and December 31, 2018, respectively	215,229	228,405
Inventories	216,569	215,435
Prepaid expenses and other	41,274	42,446
Total current assets	780,990	734,838
Property, plant and equipment, net	441,215	446,835
Deferred income tax	31,830	31,652
Goodwill	135,669	132,437
Intangible assets, net	133,506	137,935
Other	89,788	42,674
Total assets	1,612,998	1,526,371
Current liabilities:
Line of credit	12,330	10,254
Accounts payable	107,078	117,808
Accrued liabilities and other	86,880	82,605
Income tax payable	21,452	15,744
Current portion of long-term debt	28,403	27,613
Total current liabilities	256,143	254,024
Long-term debt, net of current portion	187,378	186,143
Deferred tax liabilities	18,003	17,993
Other long-term liabilities	134,176	90,779
Total liabilities	595,700	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; 50,596,756 and 50,221,035, issued and outstanding at March 31, 2019 and December 31, 2018, respectively	34,704	34,454
Additional paid-in capital	410,163	399,915
Retained earnings	668,424	636,708
Treasury stock, at cost, 1,457,206 shares held at March 31, 2019 and December 31, 2018	(37,768)	(37,768)
Accumulated other comprehensive loss	(106,848)	(101,846)
Total stockholders' equity	968,675	931,463
Noncontrolling interest	48,623	45,969
Total equity	1,017,298	977,432
Total liabilities and stockholders' equity	$ 1,612,998	$ 1,526,371