Quarterly report pursuant to Section 13 or 15(d)

OTHER-THAN-TEMPORARY-IMPAIRMENT - Summary of amounts recorded in the statement of operations for OTTI (Details)

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OTHER-THAN-TEMPORARY-IMPAIRMENT - Summary of amounts recorded in the statement of operations for OTTI (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Schedule of Investments [Line Items]        
Other-than-temporary impairment on securities $ 450 $ 0 $ 9,860 $ 0
Other Investments [Member]        
Schedule of Investments [Line Items]        
Other-than-temporary impairment on securities 0 0 7,505 0
Debt Securities [Member]        
Schedule of Investments [Line Items]        
Other-than-temporary impairment on securities 363 $ 0 1,988 $ 0
Equity Securities [Member]        
Schedule of Investments [Line Items]        
Other-than-temporary impairment on securities $ 87   $ 367