CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 201,226	$ 247,802
Short-term investments	12,737	29,842
Accounts receivable, net of allowances of $3,218 and $2,141 at September 30, 2017 and December 31, 2016, respectively	230,460	217,217
Inventories	211,412	193,483
Prepaid expenses and other	45,644	44,438
Total current assets	701,479	732,782
Property, plant and equipment, net	446,052	401,988
Deferred income tax	64,129	56,047
Goodwill	133,538	129,412
Intangible assets, net	161,122	174,876
Other	34,269	33,447
Total assets	1,540,589	1,528,552
Current liabilities:
Accounts payable	111,689	87,600
Accrued liabilities and other	94,436	71,562
Income tax payable		11,855
Current portion of long-term debt	19,067	14,356
Total current liabilities	225,192	185,373
Long-term debt, net of current portion	306,687	413,126
Deferred tax liabilities	28,617	28,213
Other long-term liabilities	85,209	81,373
Total liabilities	645,705	708,085
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; 49091693 and 48,219,376, issued and outstanding at September 30, 2017 and December 31, 2016, respectively	33,501	32,919
Additional paid-in capital	375,134	354,574
Retained earnings	563,338	530,215
Treasury stock, at cost, 1,157,206 shares held at September 30, 2017 and December 31, 2016	(29,023)	(29,023)
Accumulated other comprehensive loss	(89,707)	(112,666)
Total stockholders' equity	853,243	776,019
Noncontrolling interest	41,641	44,448
Total equity	894,884	820,467
Total liabilities and stockholders' equity	$ 1,540,589	$ 1,528,552