Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Line Items]
Tax loss carryforwards	$ 30,000
Unrepatriated foreign earnings	1,100
U.S. [Member]
Income Tax Disclosure [Line Items]
Total deferred tax assets	101,556	$ 71,225
Total deferred tax liabilities	19,025	23,662
Net deferred tax asset	$ 82,531	47,563
U.S. [Member] | Current Assets [Member]
Income Tax Disclosure [Line Items]
Accounts receivable		1,597
Inventories		343
Other		2,662
Deferred tax assets before valuation allowance		$ 4,602
Less: valuation allowance
Total deferred tax assets		$ 4,602
U.S. [Member] | Noncurrent Assets [Member]
Income Tax Disclosure [Line Items]
Accounts receivable	$ 1,392
Inventories	897
Deferred compensation	6,714	$ 5,981
Depreciation and amortization	10,323	3,575
Postretirement benefits	26,475	28,344
Tax loss carryforwards	2,682	1,358
Tax credit carryforwards	42,851	24,426
Other	10,222	2,939
Deferred tax assets before valuation allowance	$ 101,556	$ 66,623
Less: valuation allowance
Total deferred tax assets	$ 101,556	$ 66,623
U.S. [Member] | Current Liabilities [Member]
Income Tax Disclosure [Line Items]
Unrepatriated foreign earnings		$ 3,679
Inventories
Other
Total deferred tax liabilities		$ 3,679
U.S. [Member] | Noncurrent Liabilities [Member]
Income Tax Disclosure [Line Items]
Unrepatriated foreign earnings	$ 1,157
Depreciation and amortization	$ 10,309	$ 11,587
Postretirement benefits
Deferred Gain	$ 7,559	$ 8,396
Branch losses subject to recapture
Other
Total deferred tax liabilities	$ 19,025	$ 19,983
Non-U.S. [Member]
Income Tax Disclosure [Line Items]
Total deferred tax assets	20,012	30,935
Total deferred tax liabilities	9,340	18,889
Net deferred tax asset	$ 10,672	12,046
Non-U.S. [Member] | Current Assets [Member]
Income Tax Disclosure [Line Items]
Accounts receivable		1,537
Inventories		1,240
Other		3,574
Deferred tax assets before valuation allowance		6,351
Less: valuation allowance		(497)
Total deferred tax assets		$ 5,854
Non-U.S. [Member] | Noncurrent Assets [Member]
Income Tax Disclosure [Line Items]
Accounts receivable	$ 1,304
Inventories	$ 1,750
Deferred compensation
Depreciation and amortization	$ 4,882	$ 4,460
Postretirement benefits	4,138	4,804
Tax loss carryforwards	27,134	34,980
Tax credit carryforwards	1,740	1,772
Other	3,503	428
Deferred tax assets before valuation allowance	44,451	46,444
Less: valuation allowance	(24,439)	(21,363)
Total deferred tax assets	$ 20,012	$ 25,081
Non-U.S. [Member] | Current Liabilities [Member]
Income Tax Disclosure [Line Items]
Unrepatriated foreign earnings
Inventories		$ 32
Other		577
Total deferred tax liabilities		$ 609
Non-U.S. [Member] | Noncurrent Liabilities [Member]
Income Tax Disclosure [Line Items]
Unrepatriated foreign earnings
Depreciation and amortization	$ 3,174	$ 3,106
Postretirement benefits	$ 2,003	$ 1,917
Deferred Gain
Branch losses subject to recapture	$ 918	$ 11,369
Other	3,245	1,888
Total deferred tax liabilities	$ 9,340	$ 18,280