CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 265,119	$ 247,802
Short-term investments	32,524	29,842
Accounts receivable, net of allowances of $2,096 and $2,141 at March 31, 2017 and December 31, 2016, respectively	204,972	217,217
Inventories	191,301	193,483
Prepaid expenses and other	45,333	44,438
Total current assets	739,249	732,782
Property, plant and equipment, net	405,247	401,988
Deferred income tax	61,559	56,047
Goodwill	131,059	129,412
Intangible assets, net	170,180	174,876
Other	33,711	33,447
Total assets	1,541,005	1,528,552
Current liabilities:
Accounts payable	90,780	87,600
Accrued liabilities	74,866	71,562
Income tax payable	6,282	11,855
Current portion of long-term debt	15,938	14,356
Total current liabilities	187,866	185,373
Long-term debt, net of current portion	400,493	413,126
Deferred tax liabilities	28,225	28,213
Other long-term liabilities	80,242	81,373
Total liabilities	696,826	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; 48,348,953 and 48,219,376, issued and outstanding at March 31, 2017 and December 31, 2016, respectively	33,006	32,919
Additional paid-in capital	361,390	354,574
Retained earnings	535,708	530,215
Treasury stock, at cost, 1,157,206 shares held at March 31, 2017 and December 31, 2016	(29,023)	(29,023)
Accumulated other comprehensive loss	(101,841)	(112,666)
Total stockholders' equity	799,240	776,019
Noncontrolling interest	44,939	44,448
Total equity	844,179	820,467
Total liabilities and stockholders' equity	$ 1,541,005	$ 1,528,552