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ACQUISITION (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 04, 2015
USD ($)
Feb. 05, 2014
USD ($)
Jun. 30, 2015
USD ($)
state
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
state
subsidiary
Jun. 30, 2014
USD ($)
Business acquisition            
Amount of investment         $ 1,711 $ 5,301
Equity in earnings of unconsolidated investees     $ 6,186 $ 5,864 $ 10,380 9,289
Prime Holdings Insurance Services, Inc. (Prime) [Member]            
Business acquisition            
Amount of investment $ 1,700 $ 5,300        
Equity ownership interest (as a percent) 27.00% 20.00%        
Number of states in which entity operates | state     49   49  
Equity in earnings of unconsolidated investees     $ 300 200 $ 800 300
Percentage of quota share reinsurance treaty, effective January 1, 2014         25.00%  
Number of insurance subsidiaries | subsidiary         2  
Reinsurance assumed     $ 3,600 $ 2,500 $ 6,700 $ 5,000