Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income from continuing operations before income taxes and equity income
United States	$ 16,169,000	$ 22,951,000	$ (30,422,000)
International	18,646,000	(8,813,000)	(160,754,000)
Income (loss) from continuing operations before income taxes and equity income (loss)	34,815,000	14,138,000	(191,176,000)
Currently payable:
U.S. federal	408,000	5,622,000	9,822,000
U.S. state	546,000	557,000	1,375,000
International	23,095,000	14,569,000	41,015,000
Total income taxes currently payable	24,049,000	20,748,000	52,212,000
Deferred U.S. federal	2,651,000	3,447,000	(18,615,000)
Deferred U.S. state	812,000	893,000	473,000
Deferred international	166,000	5,278,000	(2,095,000)
Total income tax expense	27,678,000	30,366,000	31,975,000
Cash payments for income taxes, including taxes on gain or loss from discontinued business	18,900,000	36,000,000	44,400,000
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. federal income tax	12,185,000	4,949,000	(66,912,000)
U.S. state income taxes, net of federal income tax benefit	496,000	713,000	(917,000)
U.S. domestic manufacturing deductions and credits	(2,504,000)	(1,882,000)	(4,700,000)
Tax costs of repatriation from the Infrastructure Transaction	0	0	13,181,000
Difference in effective tax rates on international earnings and remittances	5,095,000	4,397,000	581,000
Uncertain tax position contingencies and settlements	1,416,000	(5,298,000)	(5,548,000)
Changes in realization on beginning of the year deferred tax assets	923,000	2,283,000	20,125,000
Restructuring and impairment charges with no realizable tax benefits	8,508,000	21,969,000	0
U.S. nondeductible items	874,000	1,216,000	2,953,000
Loss from disposal from the Infrastructure Transaction	580,000	2,592,000	73,819,000
Cumulative effect of change in statutory tax rates/laws	340,000	246,000	(370,000)
Income (loss) from unconsolidated entities	62,000	(587,000)	0
Other, net	$ (297,000)	$ (232,000)	$ (237,000)
Effective Income Tax Rate Reconciliation, Percent	79.50%	214.80%	(16.70%)
Components of Deferred Tax Assets and Liabilities [Abstract]
Expense accruals	$ 24,538,000	$ 27,737,000
Inventories	5,588,000	4,396,000
Provision for receivables	1,049,000	798,000
Operating loss carryforwards	77,151,000	75,635,000
Foreign tax credit carryforwards	19,199,000	16,476,000
Capital loss carryforwards	2,102,000	2,102,000
Pensions	66,675,000	91,377,000
Currency adjustments	28,589,000	35,386,000
Unit adjustment liability	29,491,000	34,675,000
Post-retirement benefits	869,000	905,000
Other	8,446,000	9,079,000
Deferred tax assets, gross	263,697,000	298,566,000
Valuation allowance	(110,680,000)	(131,422,000)
Deferred tax assets, net	153,017,000	167,144,000
Depreciation and amortization	11,474,000	16,026,000
Deferred revenue	1,904,000	1,708,000
Equity investment in Infrastructure strategic venture	10,688,000	23,885,000
Deferred tax liabilities	24,066,000	41,619,000
Deferred Tax Assets, Net, Classification [Abstract]
Other current assets	38,899,000	39,003,000
Other assets	102,914,000	94,021,000
Other current liabilities	767,000	1,120,000
Deferred income taxes	12,095,000	6,379,000
Undistributed earnings indefinitely reinvested outside United States	547,000,000	705,000,000
Interest and penalties recognized	0	2,100,000	$ 3,100,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	2,800,000	2,800,000	4,900,000
Infrastructure transaction
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Gain (Loss) on Disposition of Business	(1,000,000)	(2,900,000)	$ (272,300,000)
Infrastructure Transaction
Deferred Tax Assets, Net, Classification [Abstract]
Non-cash tax expense	0	8,000,000
Currency translation
Deferred Tax Assets, Net, Classification [Abstract]
Non-cash tax expense	0	(9,300,000)
UK tax rate changes [Member]
Deferred Tax Assets, Net, Classification [Abstract]
Non-cash tax expense	0
Pension adjustments
Deferred Tax Assets, Net, Classification [Abstract]
Non-cash tax expense	0	$ 6,600,000
Capital loss carryforward
Deferred Tax Assets, Net, Classification [Abstract]
Non-cash tax expense	(1,100,000)
Expiring in 2018
Components of Deferred Tax Assets and Liabilities [Abstract]
Capital loss carryforwards	2,100,000
International operations
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating loss carryforwards	67,200,000
Deferred Tax Assets, Net, Classification [Abstract]
Operating loss carryforwards not subject to expiration	46,800,000
Operating losses subject to expiration	20,400,000
U.S. state
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating loss carryforwards	10,000,000
U.S. state | Expiring between 2016 and 2019
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating loss carryforwards	400,000
U.S. state | Expiring between 2020 and 2024
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating loss carryforwards	4,300,000
U.S. state | Expiring between 2025 and 2029
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating loss carryforwards	1,500,000
U.S. state | Expiring between 2030 and 2035
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating loss carryforwards	$ 3,800,000