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GOODWILL AND OTHER INTANGIBLES - Narrative (Details)
 12 Months Ended
Dec. 31, 2019
USD ($)
acquisition
Dec. 31, 2018
USD ($)
acquisition
Dec. 31, 2017
USD ($)
Finite-Lived Intangible Assets [Line Items]      
Number of significant acquisitions completed (acquisition) | acquisition 1 0  
Goodwill, impairment $ 0 $ 0 $ 0
Amortization of intangible assets 5,783,000 4,934,000 3,493,000
Finite-lived intangible assets, amortization expense, 2020 6,200,000    
Finite-lived intangible assets, amortization expense, 2021 6,000,000.0    
Finite-lived intangible assets, amortization expense, 2022 5,900,000    
Finite-lived intangible assets, amortization expense, 2023 5,600,000    
Finite-lived intangible assets, amortization expense, 2024 5,400,000    
Finite-lived intangible assets, amortization expense, thereafter 16,600,000    
Impairment of intangible assets, finite-lived $ 0 $ 0 $ 0
Minimum      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 4 years    
Maximum      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 15 years