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Acquisitions (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended			12 Months Ended
	Feb. 28, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Acquisition [Abstract]
Cash paid for acquisition					$ 31,745	$ 8,692		$ 0
Goodwill					$ 114,954	$ 114,954	[1]
Useful life					15 years
Vertical Eden, LLC [Member]
Acquisition [Abstract]
Percentage of entity acquired			30.00%	70.00%
Cash paid for acquisition			$ 12,500	$ 3,300
Contingent consideration				1,500
Goodwill				$ 2,500
Intangible assets			$ 4,400
Vertical Eden, LLC [Member] | Minimum [Member]
Acquisition [Abstract]
Useful life					3 years
Vertical Eden, LLC [Member] | Maximum [Member]
Acquisition [Abstract]
Useful life					7 years
Treviso, LLC [Member]
Acquisition [Abstract]
Percentage of entity acquired	35.00%
Purchase price	$ 21,000
Possible earnout	1,000
Investment in equity investee	12,600
Value of shares issued	$ 8,400
Number of shares issued (in shares)	169,560
Share price (in dollars per share)	$ 49.54
Dr. Dana Beauty, LLC [Member]
Acquisition [Abstract]
Cash paid for acquisition		$ 7,000
Contingent consideration		$ 4,300
[1] Goodwill was recast to reflect current period presentation by geographic region at December 31, 2016.

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