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Fixed Maturity Securities In An Unrealized Loss Position (Tables)
 3 Months Ended
Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
Securities in an unrealized loss position The following tables summarize all fixed maturity securities in an unrealized loss position at March 31, 2021 and December 31, 2020 by the length of time those securities have been continuously in an unrealized loss position:
  Less Than 12 Months12 Months or GreaterTotal
(In thousands)Fair
Value		Gross
Unrealized Losses		Fair
Value		Gross
Unrealized Losses		Fair
Value		Gross
Unrealized Losses
March 31, 2021
U.S. government and government agency$57,625 $913 $462 $2 $58,087 $915 
State and municipal288,083 4,949 20,219 1,232 308,302 6,181 
Mortgage-backed securities322,410 11,927 30,537 374 352,947 12,301 
Asset-backed securities1,803,588 4,917 652,450 13,243 2,456,038 18,160 
Corporate1,414,453 15,904 113,498 3,214 1,527,951 19,118 
Foreign government309,304 9,253 20,374 33,166 329,678 42,419 
Fixed maturity securities$4,195,463 $47,863 $837,540 $51,231 $5,033,003 $99,094 
December 31, 2020
U.S. government and government agency$47,649 $347 $17 $— $47,666 $347 
State and municipal147,754 1,165 20,528 904 168,282 2,069 
Mortgage-backed securities212,388 5,121 23,943 230 236,331 5,351 
Asset-backed securities1,389,133 6,563 656,877 26,934 2,046,010 33,497 
Corporate612,177 6,721 39,985 1,759 652,162 8,480 
Foreign government143,729 22,871 6,218 21,577 149,947 44,448 
Fixed maturity securities$2,552,830 $42,788 $747,568 $51,404 $3,300,398 $94,192 
Non-Investment Grade Fixed Maturity Securities A summary of the Company’s non-investment grade fixed maturity securities that were in an unrealized loss position at March 31, 2021 is presented in the table below:
($ in thousands)Number of
Securities		Aggregate
Fair Value		Gross
Unrealized Loss
Foreign government19 $79,761 $39,694 
Corporate8 25,066 2,071 
Mortgage-backed securities5 540 24 
Total32 $105,367 $41,789