INDEBTEDNESS - Schedule of Credit Facility (Details) - Credit Agreement - Revolving Credit Facility - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Commitments	$ 400,000,000.0	$ 400,000,000.0
Outstanding Borrowings	304,500,000	138,500,000
Letters of Credit Outstanding	5,100,000	5,100,000
Borrowing Capacity	$ 90,400,000	$ 256,400,000