Goodwill and Other Intangibles - Other Intangibles (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	$ 557,167
Foreign currency translation adjustments and other	(3,693)
Gross Asset Value, End of Period	553,474
Accumulated Amortization, Beginning of Period	(135,664)
Amortization	(21,246)
Foreign currency translation adjustments and other	1,437
Accumulated Amortization, End of Period	(155,473)
Net Book Value	398,001	$ 421,503
Other intangibles classified as assets held for sale		3,600
Customer lists and relationships
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	439,312
Foreign currency translation adjustments and other	(4,653)
Gross Asset Value, End of Period	434,659
Accumulated Amortization, Beginning of Period	(74,704)
Amortization	(17,682)
Foreign currency translation adjustments and other	1,003
Accumulated Amortization, End of Period	(91,383)
Net Book Value	343,276	364,608
Trade names and trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	18,981
Foreign currency translation adjustments and other	(284)
Gross Asset Value, End of Period	18,697
Accumulated Amortization, Beginning of Period	(8,295)
Amortization	0
Foreign currency translation adjustments and other	41
Accumulated Amortization, End of Period	(8,254)
Net Book Value	10,443	10,686
Patents and technology
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	61,618
Foreign currency translation adjustments and other	(5,335)
Gross Asset Value, End of Period	56,283
Accumulated Amortization, Beginning of Period	(35,203)
Amortization	(1,100)
Foreign currency translation adjustments and other	919
Accumulated Amortization, End of Period	(35,384)
Net Book Value	20,899	26,415
Other
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	37,256
Foreign currency translation adjustments and other	6,579
Gross Asset Value, End of Period	43,835
Accumulated Amortization, Beginning of Period	(17,462)
Amortization	(2,464)
Foreign currency translation adjustments and other	(526)
Accumulated Amortization, End of Period	(20,452)
Net Book Value	$ 23,383	$ 19,794

Finite lived intangible assets accumulated amortization foreign exchange impact.

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount classified as intangible assets, excluding goodwill, attributable to disposal group held for sale or disposed of.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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