CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Activities:
Net income (loss)	$ 37,761	$ 68,685	$ 37,055
Loss (income) from discontinued operations	(102)	449	7,195
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Depreciation and amortization	26,351	27,130	26,308
Stock-based compensation expense	5,393	5,153	8,096
Loss from long-term investments	0	3,245	0
Deferred income taxes	5,634	(58,253)	(2,725)
Equity in undistributed income of unconsolidated joint ventures, net	(4,326)	(4,743)	(5,451)
Dividends received from unconsolidated joint ventures	5,162	6,553	7,637
Pension and postretirement benefits	5,118	13,579	5,902
Gain from the sale of property, plant and equipment	(7)	(1,404)	(2,800)
Impairment of assets/investments	4,620	539	441
Amortization of inventory fair value		0	1,805
Changes in operating assets and liabilities excluding effects of acquisition and disposition of businesses:
Accounts receivable	(2,972)	(2,333)	(5,051)
Accounts receivable, joint ventures	245	(502)	(302)
Inventories	7,188	5,873	(20,628)
Pension contribution	(13,751)	(23,518)	(5,904)
Other current assets	639	(1,497)	(1,336)
Accounts payable and other accrued expenses	9,020	(3,461)	(27,229)
Other, net	(8,806)	4,872	(929)
Net cash provided by (used in) operating activities of continuing operations	77,167	40,367	22,084
Net cash provided by (used in) operating activities of discontinued operations	848	(328)	(5,223)
Net cash provided by (used in) operating activities	78,015	40,039	16,861
Investing Activities:
Capital expenditures	(16,859)	(23,774)	(21,316)
Proceeds from the sale of property, plant and equipment, net	7	2,804	7,500
Other investing activities	(127)	0	0
Redemptions of long-term investments	0	25,438	7,805
Acquisition of business, net of cash received		(3,100)	(139,825)
Net cash provided by (used in) investing activities of continuing operations	(16,979)	1,368	(145,836)
Net cash provided by (used in) investing activities of discontinued operations	0	0	(158)
Net cash provided by (used in) investing activities	(16,979)	1,368	(145,994)
Financing Activities:
Proceeds from long term borrowings		0	145,000
Repayment of debt principal and long term lease obligation	(21,206)	(25,519)	(22,500)
Payment of long term borrowings acquired through acquisition		0	(6,061)
Proceeds from sale of capital stock, net	32,426	17,007	11,071
Issuance of restricted stock	(1,297)	(752)	0
Proceeds from issuance of shares to employee stock purchase plan	734	809	756
Net cash provided by (used in) financing activities of continuing operations	10,657	(8,455)	128,266
Effect of exchange rate fluctuations on cash	5,328	2,183	460
Net increase (decrease) in cash and cash equivalents	77,021	35,135	(407)
Cash and cash equivalents at beginning of year	114,863	79,728	80,135
Cash and cash equivalents at end of year	191,884	114,863	79,728
Supplemental disclosure of noncash investing and financing activities
Capital lease obligation acquired through acquisition		$ 0	$ 9,206