Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Line Items]
Tax loss carryforwards	$ 36,300
Deferred tax assets before valuation allowance		13,873
Unrepatriated foreign earnings	3,700
U.S. [Member]
Income Tax Disclosure [Line Items]
Total deferred tax assets	71,225	73,229
Total deferred tax liabilities	23,662	22,849
Net deferred tax asset	47,563	50,380
U.S. [Member] | Current Assets [Member]
Income Tax Disclosure [Line Items]
Accounts receivable	1,597	1,526
Inventories	343	1,432
Tax credit carryforwards		1,000
Other	2,662	2,867
Deferred tax assets before valuation allowance	4,602	6,825
Less: valuation allowance
Total deferred tax assets	4,602	6,825
U.S. [Member] | Noncurrent Assets [Member]
Income Tax Disclosure [Line Items]
Deferred compensation	5,981	5,794
Depreciation and amortization	3,575	4,289
Postretirement benefits	28,344	28,038
Tax loss carryforwards	1,358	1,457
Tax credit carryforwards	24,426	23,992
Other	2,939	2,834
Deferred tax assets before valuation allowance	66,623	66,404
Less: valuation allowance
Total deferred tax assets	66,623	66,404
U.S. [Member] | Current Liabilities [Member]
Income Tax Disclosure [Line Items]
Unrepatriated foreign earnings	3,679	667
Inventories
Other
Total deferred tax liabilities	3,679	667
U.S. [Member] | Noncurrent Liabilities [Member]
Income Tax Disclosure [Line Items]
Depreciation and amortization	11,587	13,169
Postretirement benefits
Deferred gain	8,396	9,013
Branch losses subject to recapture
Other
Total deferred tax liabilities	19,983	22,182
Non-U.S. [Member]
Income Tax Disclosure [Line Items]
Total deferred tax assets	30,935	43,829
Total deferred tax liabilities	18,889	27,696
Net deferred tax asset	12,046	16,133
Non-U.S. [Member] | Current Assets [Member]
Income Tax Disclosure [Line Items]
Accounts receivable	1,537	2,397
Inventories	1,240	2,411
Tax credit carryforwards
Other	3,574	3,058
Deferred tax assets before valuation allowance	6,351	7,866
Less: valuation allowance	(497)	(818)
Total deferred tax assets	5,854	7,048
Non-U.S. [Member] | Noncurrent Assets [Member]
Income Tax Disclosure [Line Items]
Deferred compensation
Depreciation and amortization	4,460	3,505
Postretirement benefits	4,804	4,540
Tax loss carryforwards	34,980	76,026
Tax credit carryforwards	1,772	1,508
Other	428	371
Deferred tax assets before valuation allowance	46,444	85,950
Less: valuation allowance	(21,363)	(49,169)
Total deferred tax assets	25,081	36,781
Non-U.S. [Member] | Current Liabilities [Member]
Income Tax Disclosure [Line Items]
Unrepatriated foreign earnings
Inventories	32	1,366
Other	577	1,822
Total deferred tax liabilities	609	3,188
Non-U.S. [Member] | Noncurrent Liabilities [Member]
Income Tax Disclosure [Line Items]
Depreciation and amortization	3,106	8,357
Postretirement benefits	1,917	1,377
Deferred gain
Branch losses subject to recapture	11,369	12,380
Other	1,888	2,394
Total deferred tax liabilities	$ 18,280	$ 24,508