Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale Securities, at Fair Value Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details)

v3.19.1
Available-for-Sale Securities, at Fair Value Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
position
Mar. 31, 2018
USD ($)
position
Debt Securities, Available-for-sale [Abstract]    
Other-than-temporary impairment losses $ (206) $ (94)
Other than Temporary Impairment Losses, Investments, Number, Available-for-sale Securities | position 2 1
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Market Value $ 133,700  
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Weighted Average Cumulative Losses 6.60%  
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Weighted Average Three-Month Prepayment Speed 0.058  
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Delinquency Rate 18.90%  
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Weighted Average FICO Score 673  
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]    
Cumulative credit loss at beginning of period $ (6,865) $ (6,395)
Other-than-temporary impairments not previously recognized (99) 0
Increases related to other-than-temporary impairments on securities with previously recognized other-than-temporary impairments (107) (94)
Decreases related to other-than-temporary impairments on securities paid down 1,703 0
Decreases related to other-than-temporary impairments on securities sold 840 0
Cumulative credit loss at end of period $ (4,528) $ (6,489)