CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 218,435	$ 243,000
Short-term investments	64,685	11,726
Accounts receivable, net of allowances of $2,625 and $1,682 at December 31, 2015 and December 31, 2014, respectively.	218,496	188,248
Inventories	202,832	182,026
Prepaid expenses and other	46,103	50,510
Total current assets	750,551	675,510
Property, plant and equipment, net	439,340	309,931
Deferred income assets	45,120	43,845
Goodwill	132,913	81,229
Intangible assets, net	196,409	45,028
Other assets	36,697	23,614
Total assets	1,601,030	1,179,157
Current liabilities
Lines of credit and short-term debt		1,064
Accounts payable	86,463	79,390
Accrued liabilities	77,801	60,149
Income tax payable	5,117	8,381
Current portion of long-term debt	10,282	287
Total current liabilities	179,663	149,271
Long-term debt, net of current portion	455,941	140,787
Deferred tax liabilities	32,276
Other long-term liabilities	90,153	78,932
Total liabilities	$ 758,033	$ 368,990
Commitments and contingencies - (Note 15)
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; 48,614,087 and 47,591,092 issued at December 31, 2015 and 2014, respectively	$ 32,404	$ 31,729
Additional paid-in capital	344,086	314,942
Retained earnings	514,280	490,006
Treasury stock, at cost, 466,010 shares held at December 31, 2015	(11,009)
Accumulated other comprehensive loss	(84,416)	(68,402)
Total stockholders' equity	795,345	768,275
Noncontrolling interest	47,652	41,892
Total equity	842,997	810,167
Total liabilities and stockholders' equity	$ 1,601,030	$ 1,179,157