Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
Available-for-Sale Securities, at Fair Value Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
numberOfPositions
Dec. 31, 2018
USD ($)
numberOfPositions
Debt Securities, Available-for-sale [Abstract]      
Other-than-temporary impairment losses   $ (14,300) $ (500)
Other than Temporary Impairment Losses, Investments, Number, Available-for-sale Securities | numberOfPositions   18 3
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]      
Cumulative other-than-temporary credit losses at beginning of period $ (17,021) $ (6,865) $ (6,395)
Other-than-temporary impairments not previously recognized 0 (11,724) (264)
Increases related to other-than-temporary impairments on securities with previously recognized other-than-temporary impairments 0 (2,588) (206)
Decreases related to other-than-temporary impairments on securities paid down 0 1,703 0
Decreases related to other-than-temporary impairments on securities sold 17,021 2,453 0
Cumulative other-than-temporary credit losses at end of period $ 0 $ (17,021) $ (6,865)