Intangible Assets and Goodwill - Schedule of Changes in Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Changes to goodwill
Beginning Balance	$ 71,871	$ 72,463
Goodwill recognized in acquisition	54,665
Effect of changes in foreign currency exchange rates	97	(592)
Ending Balance	126,633	71,871
Domestic Owned Regions
Changes to goodwill
Beginning Balance	68,809	68,809
Goodwill recognized in acquisition	54,665
Ending Balance	123,474	68,809
Global Owned Regions
Changes to goodwill
Beginning Balance	3,062	3,654
Effect of changes in foreign currency exchange rates	97	(592)
Ending Balance	$ 3,159	$ 3,062

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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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 foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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