CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 220,526	$ 218,435
Short-term investments	34,766	64,685
Accounts receivable, net of allowances of $2,670 and $2,625 at September 30, 2016 and December 31, 2015, respectively	239,278	218,496
Inventories	204,251	202,832
Prepaid expenses and other	40,691	46,103
Total current assets	739,512	750,551
Property, plant and equipment, net	415,618	439,340
Deferred income tax	50,702	45,120
Goodwill	131,661	132,913
Intangible assets, net	180,232	196,409
Other	34,715	34,494
Total assets	1,552,440	1,598,827
Current liabilities:
Accounts payable	90,548	86,463
Accrued liabilities	71,758	77,801
Income tax payable		5,117
Current portion of long-term debt	10,300	10,282
Total current liabilities	172,606	179,663
Long-term debt, net of current portion	407,052	453,738
Deferred tax liabilities	32,219	32,276
Other long-term liabilities	97,150	90,153
Total liabilities	709,027	755,830
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; 48,816,264 and 48,148,077, issued and outstanding at September 30, 2016 and December 31, 2015, respectively	32,856	32,404
Additional paid-in capital	353,539	344,086
Retained earnings	528,947	514,280
Treasury stock, at cost, 466,010 shares held at September 30, 2016 and December 31, 2015	(11,009)	(11,009)
Accumulated other comprehensive loss	(105,735)	(84,416)
Total stockholders' equity	798,598	795,345
Noncontrolling interest	44,815	47,652
Total equity	843,413	842,997
Total liabilities and stockholders' equity	$ 1,552,440	$ 1,598,827