Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Line Items]
Total current deferred tax assets	$ 8,577
Total noncurrent deferred tax assets	118,128	139,955
Total current deferred tax liabilities	5,401	6,857
U.S. [Member]
Income Tax Disclosure [Line Items]
Total current deferred tax assets	8,577	7,606
Noncurrent deferred tax assets before valuation allowance	95,306	91,049
Less: valuation allowance	(739)
Total noncurrent deferred tax assets	94,567	91,049
Total deferred tax assets	103,144	98,655
Total current deferred tax liabilities	3,672	1,907
Total noncurrent deferred tax liabilities	17,610	17,051
Total deferred tax liabilities	21,282	18,958
Net deferred tax asset	81,862	79,697
U.S. [Member] | Current Assets [Member]
Income Tax Disclosure [Line Items]
Accounts receivable	1,713	2,165
Inventories	3,049	2,637
Restructuring costs	1,763	716
Deferred compensation	236	285
Other	1,816	1,803
U.S. [Member] | Noncurrent Assets [Member]
Income Tax Disclosure [Line Items]
Deferred compensation	5,420	4,914
Depreciation and amortization
Postretirement benefits	45,547	45,749
Tax loss carryforwards	2,002	5,742
Impairment of investment	1,560	1,560
Tax credit carryforwards	36,868	30,895
Original issue discount	645	1,120
Other	3,264	1,069
U.S. [Member] | Current Liabilities [Member]
Income Tax Disclosure [Line Items]
Accounts receivable
Inventories
Unrepatriated foreign earnings	3,672	1,907
U.S. [Member] | Noncurrent Liabilities [Member]
Income Tax Disclosure [Line Items]
Depreciation and amortization	17,139	16,285
Postretirement benefits
Debt discount	471	766
Branch losses subject to recapture
Non-U.S. [Member]
Income Tax Disclosure [Line Items]
Total current deferred tax assets	11,549	9,321
Noncurrent deferred tax assets before valuation allowance	86,235	91,046
Less: valuation allowance	(62,674)	(42,140)
Total noncurrent deferred tax assets	23,561	48,906
Total deferred tax assets	35,110	58,227
Total current deferred tax liabilities	1,729	4,950
Total noncurrent deferred tax liabilities	26,983	27,928
Total deferred tax liabilities	28,712	32,878
Net deferred tax asset	6,398	25,349
Non-U.S. [Member] | Current Assets [Member]
Income Tax Disclosure [Line Items]
Accounts receivable	2,279	1,538
Inventories	1,919	944
Restructuring costs
Deferred compensation
Other	7,351	6,839
Non-U.S. [Member] | Noncurrent Assets [Member]
Income Tax Disclosure [Line Items]
Deferred compensation
Depreciation and amortization	2,502	3,197
Postretirement benefits	8,984	7,166
Tax loss carryforwards	70,510	77,485
Impairment of investment
Tax credit carryforwards	3,980	1,598
Original issue discount
Other	259	1,600
Non-U.S. [Member] | Current Liabilities [Member]
Income Tax Disclosure [Line Items]
Accounts receivable	210	1,644
Inventories	1,514	2,721
Unrepatriated foreign earnings
Non-U.S. [Member] | Noncurrent Liabilities [Member]
Income Tax Disclosure [Line Items]
Depreciation and amortization	10,953	14,169
Postretirement benefits	1,854	663
Debt discount
Branch losses subject to recapture	$ 14,176	$ 13,096