SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) - Fair Value, Inputs, Level 3 [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Common Stock [Member]    
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at Beginning of Period $ 290 $ 319
Fair Value Adjustments
Relating to Undistributed Earnings
Purchases, Sales and Settlements 9 (29)
Transfer in and/or out of Level 3
Balance at End of Period 299 290
Partnership Interests [Member]    
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at Beginning of Period 1,766
Fair Value Adjustments 2,294 79
Relating to Undistributed Earnings 1,366
Purchases, Sales and Settlements 8,000 1,687
Transfer in and/or out of Level 3  
Balance at End of Period 13,426 1,766
Mandatorily redeemable noncontrolling interests issued after November 5, 2003 [Member]    
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at Beginning of Period 2,330 2,285
Fair Value Adjustments 800
Relating to Undistributed Earnings 84 45
Purchases, Sales and Settlements  
Transfer in and/or out of Level 3  
Balance at End of Period 3,214 2,330
Contingent consideration [Member]    
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at Beginning of Period 2,391
Fair Value Adjustments 101 2,391
Relating to Undistributed Earnings  
Purchases, Sales and Settlements (1,250)
Transfer in and/or out of Level 3  
Balance at End of Period 1,242 2,391
Corporate Bond [Member]    
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at Beginning of Period  
Fair Value Adjustments  
Relating to Undistributed Earnings  
Purchases, Sales and Settlements 160  
Transfer in and/or out of Level 3  
Balance at End of Period $ 160