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Goodwill and Intangible Assets, Net, Intangible Assets, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Changes in gross carrying amount of finite-lived intangible assets
Gross carrying amount	$ 54,259	$ 53,178	$ 54,827
Accumulated amortization	(30,111)	(28,776)	(26,525)
Net carrying amount	24,148	24,402	28,302
North America
Changes in gross carrying amount of finite-lived intangible assets
Gross carrying amount	30,824	30,825	30,715
Accumulated amortization	(16,795)	(16,002)	(14,472)
Net carrying amount	14,029	14,823	16,243
Europe
Changes in gross carrying amount of finite-lived intangible assets
Gross carrying amount	23,435	22,353	24,112
Accumulated amortization	(13,316)	(12,774)	(12,053)
Net carrying amount	$ 10,119	$ 9,579	$ 12,059

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
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- Definition

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

+ References

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-Publisher FASB
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