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Nature of Operations and Basis of Presentation (Narrative) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
state
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
state
segment
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]          
Number of business segments | segment     2    
Segment Reporting Information [Line Items]          
Payment for income taxes     $ 7,628,000 $ 24,017,000  
Federal tax refund received     10,000,000 0  
Interest payments     0 0  
Decrease in DAC asset related to assumed realization of unrealized gains (losses) $ 10,166,000   10,166,000   $ 6,413,000
Federal income tax expense 2,903,000 $ 2,250,000 $ (2,250,000) $ (4,097,000)  
Federal statutory rate     35.00% 35.00%  
Liability for unrecognized tax benefits 0   $ 0   $ 0
Excess tax benefit $ 354,000   $ 484,000    
Property and Casualty Insurance          
Segment Reporting Information [Line Items]          
Number of states in which we are licensed as insurer | state 46   46    
Life Insurance          
Segment Reporting Information [Line Items]          
Number of states in which we are licensed as insurer | state 37   37