FAIR VALUE DISCLOSURES - Summary Of Assumptions Used In Calculating Fair Value (Details) $ in Millions	Sep. 30, 2019 USD ($) year	Dec. 31, 2018 USD ($) year
Monte Carlo Simulation | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input	0.1100
Monte Carlo Simulation | Discount rate | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input		0.1075
Monte Carlo Simulation | Discount rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input		0.1225
Monte Carlo Simulation | Payment cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payment cap | $	$ 26.3	$ 37.3
Monte Carlo Simulation | Expected payment period remaining
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input	2.6
Monte Carlo Simulation | Expected payment period remaining | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input		1
Monte Carlo Simulation | Expected payment period remaining | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input		3
Income Approach | Discount rate | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input	0.0370	0.0370
Income Approach | Discount rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input	0.1075	0.0500
Income Approach | Payment cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payment cap | $	$ 2.5	$ 27.3
Income Approach | Expected payment period remaining
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input		1
Income Approach | Expected payment period remaining | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input	0
Income Approach | Expected payment period remaining | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input	4
Discounted Cash Flow Technique | Discount rate | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input		0.0603
Discounted Cash Flow Technique | Discount rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input		0.1575
Discounted Cash Flow Technique | Payment cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payment cap | $		$ 1.1
Discounted Cash Flow Technique | Expected payment period remaining | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input		1
Discounted Cash Flow Technique | Expected payment period remaining | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability, measurement input		4
Fair value, measurements, recurring | Monte Carlo Simulation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value | $	$ 23.6	$ 33.2
Fair value, measurements, recurring | Income Approach
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value | $	$ 2.4	26.5
Fair value, measurements, recurring | Discounted Cash Flow Technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value | $		$ 1.0