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SEGMENT INFORMATION - Schedule of Reconciliation of Assets from Segment to Consolidated (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Segment Reporting Information [Line Items]    
Total consolidated assets $ 5,964,804 $ 5,857,755
Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member]    
Segment Reporting Information [Line Items]    
Total consolidated assets 3,121,091 3,015,665
Segment Reconciling Items [Member]    
Segment Reporting Information [Line Items]    
Total consolidated assets 2,690,398 2,624,966
Eliminations and Unallocated in Consolidation [Member]    
Segment Reporting Information [Line Items]    
Total consolidated assets $ 153,315 $ 217,124