Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 52,036	$ 62,451
Short term investments	950	3,750
Accounts receivable, net	112,588	102,493
Inventories	61,769	74,677
Income taxes receivable	1,104	3,740
Deferred income taxes	0	9,897
Other current assets	14,476	17,768
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current	2,897	1,235
Total current assets	245,820	276,011
Property, plant and equipment, net	234,646	255,035
Investment in and advances to unconsolidated affiliate	2,000	2,000
Non-current deferred income taxes, net	25,598	17,852
Other non-current assets	31,865	29,012
Total assets	539,929	579,910
Current liabilities:
Accounts payable	20,913	23,938
Accrued liabilities	46,214	48,024
Accrued Income Taxes, Current	6,735	0
Total current liabilities	73,862	71,962
Non-current income tax liabilities	4,510	13,621
Non-current deferred income tax liabilities, net	8,094	15,122
Other non-current liabilities	39,551	40,199
Commitments and contingent liabilities (Note 11)	0	0
Shareholders' equity:
Preferred stock, no par value, Authorized - 1,000,000 shares, Issued - none	0	0
Common stock, no par value, Authorized - 100,000,000 shares, Issued and outstanding - 26,730,247 shares, (27,155,550 shares at December 31, 2013)	88,108	81,473
Accumulated other comprehensive loss	(101,713)	(81,425)
Retained earnings	427,517	438,958
Total shareholders' equity	413,912	439,006
Total liabilities and shareholders' equity	$ 539,929	$ 579,910