Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 57,786	$ 52,036
Short term investments	750	950
Accounts receivable, net	99,331	112,588
Inventories	82,837	61,769
Income taxes receivable	3,682	1,104
Other current assets	9,695	14,476
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current	0	2,897
Total current assets	254,081	245,820
Property, plant and equipment, net	227,403	234,646
Investment in and advances to unconsolidated affiliate	2,000	2,000
Non-current deferred income taxes, net	28,838	25,598
Other non-current assets	30,434	31,865
Total assets	542,756	539,929
Current liabilities:
Accounts payable	37,856	20,913
Accrued liabilities	46,315	46,214
Accrued Income Taxes, Current	1,793	6,735
Total current liabilities	85,964	73,862
Liability for Uncertainty in Income Taxes, Noncurrent	5,301	4,510
Non-current deferred income tax liabilities, net	3,628	8,094
Other non-current liabilities	49,637	39,551
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)	89,916	88,108
Accumulated other comprehensive loss	(124,925)	(101,713)
Retained earnings	433,235	427,517
Total shareholders' equity	398,226	413,912
Total liabilities and shareholders' equity	$ 542,756	$ 539,929