SEGMENT INFORMATION - Schedule of Total Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Items excluded from segment assets:
Deferred tax assets	$ 91,837	$ 77,545
Total Consolidated Assets	2,765,471	$ 2,760,727	$ 2,756,502
Corporate Reconciling Items and Eliminations
Items excluded from segment assets:
Cash, restricted cash and other investments	183,899		283,841
Deferred tax assets	91,837		72,490
Reportable Segments | Operating Segments
Items excluded from segment assets:
Total Consolidated Assets	1,973,627		1,903,324
All Other Segments | Operating Segments
Items excluded from segment assets:
Total Consolidated Assets	$ 516,108		$ 496,847