Quarterly report pursuant to Section 13 or 15(d)

AVAILABLE-FOR-SALE AND OTHER SECURITIES AVAILABLE-FOR-SALE AND OTHER SECURITIES - Security Impairment (Details)

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AVAILABLE-FOR-SALE AND OTHER SECURITIES AVAILABLE-FOR-SALE AND OTHER SECURITIES - Security Impairment (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]        
Impairment losses recognized in earnings on available-for-sale securities $ 76 $ 0 $ 76 $ 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]        
Balance, beginning of year 18,368 30,869 18,368 30,869
Reductions from sales (8,613) 0 (8,613) 0
Additional credit losses 76 0 76 0
Balance, end of year 9,831 30,869 9,831 30,869
Fixed Income Securities        
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]        
Impairment losses recognized in earnings on available-for-sale securities 76 0 76 0
Debt Securities        
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]        
Impairment losses recognized in earnings on available-for-sale securities $ 76 $ 0 $ 76 $ 0