v3.10.0.1

Goodwill and intangible assets - Carrying Amount (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Intangible assets
Historical Cost	$ 36,424	$ 28,905
Accumulated Amortization	(17,272)	(18,642)
Net	19,152	10,263	$ 13,783
Venue contracts
Intangible assets
Historical Cost	20,530	22,061
Accumulated Amortization	(13,829)	(13,835)
Net	6,701	8,226
Backlog
Intangible assets
Historical Cost	7,030
Accumulated Amortization	(586)
Net	6,444
Customer and partner relationships
Intangible assets
Historical Cost	3,780
Accumulated Amortization	(206)
Net	3,574
Non-compete agreements, technology and other
Intangible assets
Historical Cost	5,084	6,844
Accumulated Amortization	(2,651)	(4,807)
Net	$ 2,433	$ 2,037

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
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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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
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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-Name Accounting Standards Codification
-Topic 350
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- Definition

Amount after 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
-Subparagraph (a)(1)
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