INTANGIBLE ASSETS AND GOODWILL - Schedule of Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (12,495)	$ (11,065)
Total	22,813
Indefinite-lived intangible assets—trademarks	10,164	10,183
Total intangible assets, Gross Carrying Amount	45,530	39,779
Total intangible assets, Net Book Value	33,035	28,714
Goodwill	45,192	45,192
Total intangible assets and goodwill, Gross Carrying Amount	90,722	84,971
Total intangible assets and goodwill, Net Book Value	78,227	73,906
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Carrying Amount	26,800	26,800
Accumulated Amortization	(12,035)	(11,029)
Total	14,765	15,771
Software licenses
Finite-Lived Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Carrying Amount	8,508	1,926
Accumulated Amortization	(460)	(36)
Total	8,048	1,890
Software licenses in process
Finite-Lived Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Carrying Amount	58	870
Accumulated Amortization	0	0
Total	$ 58	$ 870