Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Activities
Net income	$ 30,977	$ 34,938	$ 37,636
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	56,769	57,502	54,447
Amortization	6,466	8,883	8,549
Noncash interest expense	1,027	753	753
Change in long-term liabilities, deferred taxes and other credits	(123,887)	237	13,125
Provision for write-off of property, plant and equipment	427	2,345	4,630
Write-off of pension liability adjustment	118,350
(Gain) on disposition of assets	(92,457)	(1,022)	(9,404)
Excess tax benefit of options exercised	(40)	(93)	(450)
Compensation and benefits paid or payable in Class A Common Stock	2,790	2,812	4,896
Changes in operating assets and liabilities, net of business acquisitions and divestitures:
Accounts receivable	(4,990)	(12,082)	(9,509)
Inventories	11,565	7,105	16,639
Prepaid expenses and other current assets	592	314	(2,031)
Income taxes prepaid and receivable	9,472	(3,747)	997
Accounts payable	3,298	(1,677)	(7,700)
Accrued liabilities	7,616	6,124	(16,776)
Income taxes payable	7,308	2,422	1,009
Other, net	(776)	455	2,761
Net cash provided by operating activities	34,507	105,269	99,572
Investing Activities
Purchases of property, plant and equipment	(37,046)	(24,988)	(27,334)
Purchased software	(161)	(3,692)	(4,257)
Proceeds from sale of assets		2,860	12,256
Proceeds from sale of discontinued operations	150,654
Cash received from life insurance policy terminations			49,302
Acquisitions, net of cash acquired			(1,902)
Net cash provided by/(used in) investing activities	113,447	(25,820)	28,065
Financing Activities
Proceeds from borrowings	46,028	14,386	17,712
Principal payments on debt	(102,128)	(65,575)	(92,448)
Proceeds from options exercised	1,311	789	125
Excess tax benefit of options exercised	40	93	450
Debt issuance costs			(4,471)
Dividends paid	(21,315)	(15,616)	(14,885)
Net cash (used in)/provided by financing activities	(76,064)	(65,923)	(93,517)
Effect of exchange rate changes on cash and cash equivalents	(81)	(3,373)	(9,285)
Increase in cash and cash equivalents	71,809	10,153	24,835
Change in cash balances of discontinued operations		(9,169)	(1,049)
Cash and cash equivalents at beginning of year	118,909	117,925	94,139
Cash and cash equivalents at end of year	$ 190,718	$ 118,909	$ 117,925