v3.19.2
Investments - Fair Value and Unrealized Losses (Details)
$ in Thousands
Jun. 30, 2019
USD ($)
security
Dec. 31, 2018
USD ($)
security
Fixed maturities, Fair value    
Less than 12 Months, Fair value $ 434,310 $ 1,595,079
12 Months or More, Fair value 512,594 1,188,564
Total, Fair value 946,904 2,783,643
Fixed maturities, Unrealized losses    
Less than 12 months, Unrealized losses (1,186) (38,695)
12 months or more, Unrealized losses (18,130) (52,253)
Total, Unrealized losses $ (19,316) $ (90,948)
Number of securities in an unrealized loss position | security 131 348
Investments fair value $ 946,904 $ 2,783,643
Investments, unrealized losses $ (19,316) $ (90,948)
Number of securities in an unrealized loss position for 12 months or greater | security 84 103
Investments fair value, unrealized loss position for 12 months or greater $ 512,594 $ 1,188,564
Investments in unrealized loss position for 12 months or greater, unrealized losses (18,130) (52,253)
U.S. treasury bonds    
Fixed maturities, Fair value    
Less than 12 Months, Fair value 249,954 125
12 Months or More, Fair value 0 0
Total, Fair value 249,954 125
Fixed maturities, Unrealized losses    
Less than 12 months, Unrealized losses (3) (1)
12 months or more, Unrealized losses 0 0
Total, Unrealized losses (3) (1)
U.S. agency bonds – mortgage-backed    
Fixed maturities, Fair value    
Less than 12 Months, Fair value 10,461 416,147
12 Months or More, Fair value 281,302 838,091
Total, Fair value 291,763 1,254,238
Fixed maturities, Unrealized losses    
Less than 12 months, Unrealized losses (52) (6,624)
12 months or more, Unrealized losses (3,151) (29,449)
Total, Unrealized losses (3,203) (36,073)
U.S. agency bonds – other    
Fixed maturities, Fair value    
Less than 12 Months, Fair value 49,988 26,838
12 Months or More, Fair value 0 17,462
Total, Fair value 49,988 44,300
Fixed maturities, Unrealized losses    
Less than 12 months, Unrealized losses (1) (27)
12 months or more, Unrealized losses 0 (521)
Total, Unrealized losses (1) (548)
Non-U.S. government and supranational bonds    
Fixed maturities, Fair value    
Less than 12 Months, Fair value 14,126 4,024
12 Months or More, Fair value 7,789 3,770
Total, Fair value 21,915 7,794
Fixed maturities, Unrealized losses    
Less than 12 months, Unrealized losses (181) (252)
12 months or more, Unrealized losses (117) (954)
Total, Unrealized losses (298) (1,206)
Asset-backed securities    
Fixed maturities, Fair value    
Less than 12 Months, Fair value 83,560 74,801
12 Months or More, Fair value 9,266 5,793
Total, Fair value 92,826 80,594
Fixed maturities, Unrealized losses    
Less than 12 months, Unrealized losses (419) (1,196)
12 months or more, Unrealized losses (134) (219)
Total, Unrealized losses (553) (1,415)
Corporate bonds    
Fixed maturities, Fair value    
Less than 12 Months, Fair value 26,221 1,052,765
12 Months or More, Fair value 214,237 286,542
Total, Fair value 240,458 1,339,307
Fixed maturities, Unrealized losses    
Less than 12 months, Unrealized losses (530) (30,334)
12 months or more, Unrealized losses (14,728) (20,820)
Total, Unrealized losses $ (15,258) (51,154)
Municipal bonds    
Fixed maturities, Fair value    
Less than 12 Months, Fair value   20,379
12 Months or More, Fair value   36,906
Total, Fair value   57,285
Fixed maturities, Unrealized losses    
Less than 12 months, Unrealized losses   (261)
12 months or more, Unrealized losses   (290)
Total, Unrealized losses   $ (551)