Goodwill (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Abstract]
Goodwill	$ 196,573	$ 196,573
Mainland China [Member]
Goodwill [Abstract]
Goodwill	32,179	32,179
Americas/Pacific [Member]
Goodwill [Abstract]
Goodwill	9,449	9,449
South Korea [Member]
Goodwill [Abstract]
Goodwill	29,261	29,261
Southeast Asia [Member]
Goodwill [Abstract]
Goodwill	18,537	18,537
Japan [Member]
Goodwill [Abstract]
Goodwill	16,019	16,019
EMEA [Member]
Goodwill [Abstract]
Goodwill	2,875	2,875
Hong Kong/Taiwan [Member]
Goodwill [Abstract]
Goodwill	6,634	6,634
Manufacturing [Member]
Goodwill [Abstract]
Goodwill	72,469	72,469	[1]
Grow Tech [Member]
Goodwill [Abstract]
Goodwill	$ 9,150	$ 9,150	[1]

[1] Goodwill for December 31, 2018 has been recast to reflect the separate disclosure of Manufacturing and Grow Tech.