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FAIR VALUE (Amount of Activity Pertaining to Level 3 Assets and Liabilities Included in Earnings) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Bonds [Member]  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Additional realized gains recognized $ 3,571
Total net (losses) gains reported in earnings 3,571
Derivatives  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Change in unrealized (losses) gains related to assets and liabilities held (72)
Change in unrealized losses related to assets and liabilities settled during the period (80)
Additional realized gains recognized 148
Total net (losses) gains reported in earnings $ (4)