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Fixed Maturity Securities In An Unrealized Loss Position
 9 Months Ended
Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
Fixed Maturity Securities In An Unrealized Loss Position Fixed Maturity Securities in an Unrealized Loss Position
    The following tables summarize all fixed maturity securities in an unrealized loss position at September 30, 2020 and December 31, 2019 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
September 30, 2020
U.S. government and government agency$115,161 $141 $18 $— $115,179 $141 
State and municipal204,907 2,809 24,290 878 229,197 3,687 
Mortgage-backed securities116,958 2,673 28,578 200 145,536 2,873 
Asset-backed securities1,443,178 15,094 665,759 37,999 2,108,937 53,093 
Corporate636,250 19,158 40,224 2,793 676,474 21,951 
Foreign government127,441 25,088 5,706 20,462 133,147 45,550 
Fixed maturity securities$2,643,895 $64,963 $764,575 $62,332 $3,408,470 $127,295 
December 31, 2019
U.S. government and government agency$83,837 $618 $53,089 $857 $136,926 $1,475 
State and municipal365,184 4,245 127,210 1,682 492,394 5,927 
Mortgage-backed securities301,358 2,281 180,148 3,220 481,506 5,501 
Asset-backed securities755,259 2,307 774,508 19,183 1,529,767 21,490 
Corporate307,367 3,148 121,470 5,172 428,837 8,320 
Foreign government164,536 32,028 107,266 61,645 271,802 93,673 
Fixed maturity securities$1,977,541 $44,627 $1,363,691 $91,759 $3,341,232 $136,386 
    Substantially all of the securities in an unrealized loss position are rated investment grade, except for the securities in the foreign government classification. In general, fair value in all classifications were affected by market disruptions caused by COVID-19. A significant amount of the unrealized loss on foreign government securities is the result of changes in currency exchange rates.  
    A summary of the Company’s non-investment grade fixed maturity securities that were in an unrealized loss position at September 30, 2020 is presented in the table below:
($ in thousands)Number of
Securities		Aggregate
Fair Value		Gross
Unrealized Loss
Foreign government22 $91,413 $45,247 
Corporate13 28,816 6,343 
Mortgage-backed securities8 1,659 34 
Total43 $121,888 $51,624 
    For fixed maturity securities that management does not intend to sell or to be required to sell, the portion of the decline in value that is considered to be due to credit factors is recognized in earnings, and the portion of the decline in value that is considered to be due to non-credit factors is recognized in other comprehensive income.
     The Company has evaluated its fixed maturity securities in an unrealized loss position and believes the unrealized losses are due primarily to temporary market and sector-related factors rather than to issuer-specific factors. None of these securities are delinquent or in default under financial covenants. Based on its assessment of these issuers, the Company expects them to continue to meet their contractual payment obligations as they become due.