Goodwill and Other Intangibles - Other Intangibles (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	$ 546,334
Foreign currency translation adjustments and other	798
Gross Asset Value, End of Period	547,132
Accumulated Amortization, Beginning of Period	(160,191)
Amortization	(13,721)
Foreign currency translation adjustments and other	(138)
Accumulated Amortization, End of Period	(174,050)
Net Book Value	373,082	$ 386,143
Customer lists and relationships
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	428,372
Foreign currency translation adjustments and other	940
Gross Asset Value, End of Period	429,312
Accumulated Amortization, Beginning of Period	(95,797)
Amortization	(11,695)
Foreign currency translation adjustments and other	(252)
Accumulated Amortization, End of Period	(107,744)
Net Book Value	321,568	332,575
Trade names and trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	18,453
Foreign currency translation adjustments and other	(12)
Gross Asset Value, End of Period	18,441
Accumulated Amortization, Beginning of Period	(8,176)
Amortization	0
Foreign currency translation adjustments and other	8
Accumulated Amortization, End of Period	(8,168)
Net Book Value	10,273	10,277
Patents and technology
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	55,801
Foreign currency translation adjustments and other	(46)
Gross Asset Value, End of Period	55,755
Accumulated Amortization, Beginning of Period	(35,248)
Amortization	(707)
Foreign currency translation adjustments and other	23
Accumulated Amortization, End of Period	(35,932)
Net Book Value	19,823	20,553
Other
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	43,708
Foreign currency translation adjustments and other	(84)
Gross Asset Value, End of Period	43,624
Accumulated Amortization, Beginning of Period	(20,970)
Amortization	(1,319)
Foreign currency translation adjustments and other	83
Accumulated Amortization, End of Period	(22,206)
Net Book Value	$ 21,418	$ 22,738

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.

+ References

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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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- Definition

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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