Acquisitions (Details) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended			12 Months Ended
		Feb. 12, 2018	Jan. 22, 2018	Feb. 28, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016	Jan. 21, 2018
Fair Value of Consideration Transferred for Acquisition [Abstract]
Total cash consideration								$ 32,235
Shares issued in conjunction with acquisition								100,115
Total consideration								132,350
Previously held equity interest in equity method	[1]							39,029
Total								171,379
Gain on step acquisition								13,644	$ 0		$ 0
Carrying value of investments		$ 25,400
Fair Value of Assets Acquired [Abstract]
Goodwill								$ 196,573	$ 114,954	[2]
Useful life								14 years
Trademarks [Member]
Fair Value of Assets Acquired [Abstract]
Useful life								11 years
Nutritional Product Manufacturer [Member]
Acquisitions [Abstract]
Percentage of entity acquired			92.00%
Percentage of acquired entity held by third party			8.00%
Innuvate [Member]
Acquisitions [Abstract]
Percentage of entity acquired			73.00%
Ownership interest in equity method investment												27.00%
Fair Value of Consideration Transferred for Acquisition [Abstract]
Total cash consideration			$ 17,587
Shares issued in conjunction with acquisition			5,863
Total consideration			23,450
Previously held equity interest in equity method	[1]		8,748
Total			32,198
Fair Value of Assets Acquired [Abstract]
Total current assets			6,219
Fixed assets			9,291
Total current liabilities			(3,942)
Other non-current liabilities			0
Total identifiable net assets acquired			17,768
Goodwill			17,230
Fair value of noncontrolling interest			(2,800)
Total consideration and value to be allocated to net assets			32,198
Innuvate [Member] | Customer List [Member]
Fair Value of Assets Acquired [Abstract]
Intangible assets			5,100
Useful life								9 years
Innuvate [Member] | Order Backlog [Member]
Fair Value of Assets Acquired [Abstract]
Intangible assets			200
Useful life								5 months
Innuvate [Member] | Trademarks [Member]
Fair Value of Assets Acquired [Abstract]
Intangible assets			$ 900
Useful life								7 years
Treviso, LLC [Member]
Acquisitions [Abstract]
Percentage of entity acquired		65.00%
Ownership interest in equity method investment				35.00%
Possible earnout				$ 1,000
Number of shares issued (in shares)				169,560
Share price (in dollars per share)				$ 49.54
Fair Value of Consideration Transferred for Acquisition [Abstract]
Total cash consideration		$ 14,648		$ 12,600
Shares issued in conjunction with acquisition		69,252		8,400
Total consideration		83,900		$ 21,000
Previously held equity interest in equity method	[1]	30,281
Total		114,181
Fair Value of Assets Acquired [Abstract]
Total current assets		19,659
Fixed assets		33,282
Total current liabilities		(3,740)
Other non-current liabilities		0
Total identifiable net assets acquired		71,701
Goodwill		42,480
Fair value of noncontrolling interest		0
Total consideration and value to be allocated to net assets		114,181
Treviso, LLC [Member] | Customer List [Member]
Fair Value of Assets Acquired [Abstract]
Intangible assets		16,500
Useful life								9 years
Treviso, LLC [Member] | Order Backlog [Member]
Fair Value of Assets Acquired [Abstract]
Intangible assets		4,700
Useful life								10 months
Treviso, LLC [Member] | Trademarks [Member]
Fair Value of Assets Acquired [Abstract]
Intangible assets		$ 1,300
Useful life								6 years
L&W Holdings [Member]
Acquisitions [Abstract]
Percentage of entity acquired		100.00%
Fair Value of Consideration Transferred for Acquisition [Abstract]
Total cash consideration		$ 0
Shares issued in conjunction with acquisition		25,000
Total consideration		25,000
Previously held equity interest in equity method		0
Total		25,000
Fair Value of Assets Acquired [Abstract]
Total current assets		7,353
Fixed assets		114
Total current liabilities		(1,495)
Other non-current liabilities		(1,731)
Total identifiable net assets acquired		12,241
Goodwill		12,759
Fair value of noncontrolling interest		0
Total consideration and value to be allocated to net assets		25,000
L&W Holdings [Member] | Customer List [Member]
Fair Value of Assets Acquired [Abstract]
Intangible assets		6,500
Useful life								7 years
L&W Holdings [Member] | Order Backlog [Member]
Fair Value of Assets Acquired [Abstract]
Intangible assets		900
Useful life								4 months
L&W Holdings [Member] | Trademarks [Member]
Fair Value of Assets Acquired [Abstract]
Intangible assets		$ 600
Useful life								5 years
Vertical Eden, LLC [Member]
Acquisitions [Abstract]
Percentage of entity acquired						30.00%	70.00%
Fair Value of Consideration Transferred for Acquisition [Abstract]
Total cash consideration						$ 12,500	$ 3,300
Shares issued in conjunction with acquisition							1,500
Fair Value of Assets Acquired [Abstract]
Intangible assets						$ 4,400
Goodwill							$ 2,500
Vertical Eden, LLC [Member] | Minimum [Member]
Fair Value of Assets Acquired [Abstract]
Useful life								3 years
Vertical Eden, LLC [Member] | Maximum [Member]
Fair Value of Assets Acquired [Abstract]
Useful life								7 years
Dr. Dana Beauty, LLC [Member]
Fair Value of Consideration Transferred for Acquisition [Abstract]
Total cash consideration					$ 7,000

[1] The acquisitions of Innuvate and Treviso are considered step acquisitions, and accordingly, the Company remeasured its pre-existing 27% equity interest in Innuvate and 35% of Treviso immediately prior to completion of the acquisition to its estimated fair value of approximately $39.0 million. As a result of the remeasurement, the Company recorded a gain of approximately $13.6 million within other income (expense), during the first quarter of 2018, representing the excess of the approximate $39.0 million estimated fair value of its pre-existing 27% equity interest in Innuvate and 35% equity interest of Treviso over its transaction date carrying value of approximately $25.4 million.

[2] Goodwill was recast to reflect current period presentation by geographic region at December 31, 2018.