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FAIR VALUE (Amount of Activity Pertaining to Level 3 Assets and Liabilities Included in Earnings) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Bonds [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Change in unrealized (losses) gains related to assets and liabilities held       $ (6)
Additional realized gains recognized $ 2,156 $ 5,080 $ 26,420 5,080
Total net (losses) gains reported in earnings $ 2,156 5,080 26,420 5,074
Derivatives        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Change in unrealized (losses) gains related to assets and liabilities held   (184)   218
Change in unrealized losses related to assets and liabilities settled during the period     (195)  
Additional realized gains recognized   605 152 1,842
Total net (losses) gains reported in earnings   $ 421 $ (43) $ 2,060