SUMMARY OF SIGNIFICANT ACCOUNTING AND REPORTING POLICIES - Accounting Pronouncements (Details) - Subsequent Event $ in Millions	Jan. 01, 2019 USD ($)
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in Operating Liabilities	$ 10.1
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	9.8
Accounting Standards Update 2017-08
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, before Tax	$ (16.5)