SEGMENT INFORMATION - Schedule of Reconciliation of Operating Earnings from Segment to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Total consolidated operating earnings	$ 232,065	$ 305,589	$ 527,553	$ 622,681
Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member]
Segment Reporting Information [Line Items]
Total consolidated operating earnings	270,340	350,921	597,588	692,215
Eliminations and Unallocated in Consolidation [Member]
Segment Reporting Information [Line Items]
Total consolidated operating earnings	$ (38,275)	$ (45,332)	$ (70,035)	$ (69,534)