Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 44,427	$ 48,822
Accounts and other receivables, net of allowance for doubtful accounts and sales returns of $3,454 in 2013 and $3,552 in 2012	120,600	100,798
Income taxes recoverable	692	2,886
Inventories	78,294	74,670
Deferred income taxes	7,100	5,614
Prepaid expenses and other	4,791	6,780
Total current assets	255,904	239,570
Property, plant and equipment, at cost	757,726	749,153
Less accumulated depreciation	497,596	495,736
Net property, plant and equipment	260,130	253,417
Goodwill and other intangibles, net	232,462	240,619
Other assets and deferred charges	50,824	49,559
Total assets	799,320	783,165
Liabilities and Shareholders' Equity
Accounts payable	91,888	82,067
Accrued expenses	44,779	42,514
Total current liabilities	136,667	124,581
Long-term debt	139,000	128,000
Deferred income taxes	59,974	60,773
Other noncurrent liabilities	95,560	97,559
Total liabilities	431,201	410,913
Commitments and contingencies (Notes 1, 3 and 13)
Shareholders' equity:
Common stock, no par value (issued and outstanding - 32,267,003 at June 30, 2013 and 32,069,370 at December 31, 2012)	18,811	15,195
Common stock held in trust for savings restoration plan	(1,410)	(1,401)
Foreign currency translation adjustment	(12,749)	131
Gain (loss) on derivative financial instruments	453	993
Pension and other postretirement benefit adjustments	(98,846)	(103,471)
Retained earnings	461,860	460,805
Total shareholders' equity	368,119	372,252
Total liabilities and shareholders' equity	$ 799,320	$ 783,165