CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
OPERATING ACTIVITIES
Net income/(loss)	$ 11,177	$ (7,379)	$ 21,870	$ 4,132
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	14,276	14,427	28,383	28,638
Amortization	1,821	1,654	3,622	3,317
Change in long-term liabilities, deferred taxes and other credits	2,946	(7,864)	2,732	(3,991)
Provision for write-off of property, plant and equipment	728	21	729	65
Gain on disposition or involuntary conversion of assets	(961)		(961)	(3,763)
Excess tax benefit of options exercised	(106)	(172)	(145)	(524)
Compensation and benefits paid or payable in Class A Common Stock	405	(476)	947	(1,174)
Changes in operating assets and liabilities that provide/(use) cash, net of business divestitures:
Accounts receivable	3,333	(4,515)	14,297	(6,238)
Inventories	(1,963)	2,458	(10,959)	(530)
Prepaid expenses and other current assets	1,762	1,544	(386)	(2,033)
Income taxes prepaid and receivable	(7)	28	14	180
Accounts payable	555	(1,139)	(739)	(592)
Accrued liabilities	170	29,912	(12,679)	20,929
Income taxes payable	651	441	(1,059)	(4,877)
Other, net	(2,098)	(793)	(4,129)	(1,231)
Net cash provided by operating activities	32,689	28,147	41,537	32,308
INVESTING ACTIVITIES
Purchases of property, plant and equipment	(12,799)	(14,620)	(27,402)	(27,808)
Purchased software	(21)	(555)	(315)	(648)
Proceeds from sale or involuntary conversion of assets	961		961	6,268
Net cash used in investing activities	(11,859)	(15,175)	(26,756)	(22,188)
FINANCING ACTIVITIES
Proceeds from borrowings	235	5,037	4,670	51,905
Principal payments on debt	(17,593)	(18,476)	(24,109)	(50,659)
Proceeds from options exercised	261	1,004	387	2,968
Excess tax benefit of options exercised	106	172	145	524
Debt acquisition costs		(76)		(1,639)
Dividends paid	(4,774)	(4,423)	(9,539)	(4,423)
Net cash used in financing activities	(21,765)	(16,762)	(28,446)	(1,324)
Effect of exchange rate changes on cash and cash equivalents	(608)	1,278	(2,165)	(2,193)
(Decrease)/increase in cash and cash equivalents	(1,543)	(2,512)	(15,830)	6,603
Cash and cash equivalents at beginning of period	208,379	199,833	222,666	190,718
Cash and cash equivalents at end of period	$ 206,836	$ 197,321	$ 206,836	$ 197,321