Total Payments to Acquire Businesses, Gross

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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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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of increase (decrease), classified as other, of an asset representing the future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Acquisitions - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2017	Dec. 31, 2016	Aug. 15, 2016	Aug. 04, 2016
Business Acquisition [Line Items]
Goodwill, Acquired During Period			$ 236
CHINA
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 2,458	$ 3,020
Goodwill, Acquired During Period				$ 2,972
Total Payments to Acquire Businesses, Gross				5,478
North America [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 32,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					$ 19,410
Goodwill, Acquired During Period			$ 0	7,175
Guangzhou [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill						$ 6,605
Goodwill, Other Increase (Decrease)				$ 9,741
Equity Method Investment, Ownership Percentage				51.00%