Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Line Items]
Tax loss carryforwards	$ 80,000
Unrepatriated foreign earnings	1,500
U.S. [Member]
Income Tax Disclosure [Line Items]
Total deferred tax assets	88,694	103,144
Total deferred tax liabilities	16,885	21,282
Net deferred tax asset	71,809	81,862
U.S. [Member] | Current Assets [Member]
Income Tax Disclosure [Line Items]
Accounts receivable	1,733	1,713
Inventories	1,589	3,049
Tax credit carryforwards	3,000
Other	3,413	3,815
Deferred tax assets before valuation allowance	9,735	8,577
U.S. [Member] | Noncurrent Assets [Member]
Income Tax Disclosure [Line Items]
Deferred compensation	5,668	5,420
Depreciation and amortization	5,004
Postretirement benefits	38,632	45,547
Tax loss carryforwards	1,032	2,002
Tax credit carryforwards	24,504	36,868
Other	4,119	5,469
Deferred tax assets before valuation allowance	78,959	95,306
Less: valuation allowance		(739)
Total deferred tax assets	78,959	94,567
U.S. [Member] | Current Liabilities [Member]
Income Tax Disclosure [Line Items]
Unrepatriated foreign earnings	1,521	3,672
Inventories
Other
Total deferred tax liabilities	1,521	3,672
U.S. [Member] | Noncurrent Liabilities [Member]
Income Tax Disclosure [Line Items]
Depreciation and amortization	15,296	17,139
Postretirement benefits
Branch losses subject to recapture
Other	68	471
Total deferred tax liabilities	15,364	17,610
Non-U.S. [Member]
Income Tax Disclosure [Line Items]
Total deferred tax assets	39,035	35,110
Total deferred tax liabilities	31,659	28,712
Net deferred tax asset	7,376	6,398
Non-U.S. [Member] | Current Assets [Member]
Income Tax Disclosure [Line Items]
Accounts receivable	2,437	2,279
Inventories	2,052	1,919
Tax credit carryforwards
Other	6,370	7,351
Deferred tax assets before valuation allowance	10,859	11,549
Non-U.S. [Member] | Noncurrent Assets [Member]
Income Tax Disclosure [Line Items]
Deferred compensation
Depreciation and amortization	2,958	2,502
Postretirement benefits	4,480	8,984
Tax loss carryforwards	78,968	70,510
Tax credit carryforwards	1,561	3,980
Other	557	259
Deferred tax assets before valuation allowance	88,524	86,235
Less: valuation allowance	(60,348)	(62,674)
Total deferred tax assets	28,176	23,561
Non-U.S. [Member] | Current Liabilities [Member]
Income Tax Disclosure [Line Items]
Unrepatriated foreign earnings
Inventories	1,383	1,514
Other	12	215
Total deferred tax liabilities	1,395	1,729
Non-U.S. [Member] | Noncurrent Liabilities [Member]
Income Tax Disclosure [Line Items]
Depreciation and amortization	10,106	10,953
Postretirement benefits	4,726	1,854
Branch losses subject to recapture	12,959	14,176
Other	2,473
Total deferred tax liabilities	$ 30,264	$ 26,983