SEGMENT INFORMATION - Schedule of Total Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Items Excluded from Segment Assets:
Deferred Tax Assets	$ 102,425	$ 103,505
Total Consolidated Assets	2,653,468	$ 2,693,802	$ 2,767,041
Corporate Reconciling Items and Eliminations
Items Excluded from Segment Assets:
Cash and Other Investments	91,731		186,295
Deferred Tax Assets	102,425		77,614
Reportable Segments | Operating Segments
Items Excluded from Segment Assets:
Total Consolidated Assets	1,949,655		1,992,549
All Other Segments | Operating Segments
Items Excluded from Segment Assets:
Total Consolidated Assets	$ 509,657		$ 510,583