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Net realized and unrealized (losses) gains (Tables)
 3 Months Ended
Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
Gross realized investment and other gains and losses Realized and unrealized gains and losses are detailed as follows:
 Three Months Ended 
 March 31,
 20212020
 ($000 omitted)
Realized gains170 153 
Realized losses(2,469)(690)
Net unrealized investment (losses) gains recognized on equity securities still held at end of period5,573 (10,554)
3,274 (11,091)
Investments in equity securities still held The total fair values of the Company's investments in debt and equity securities are as follows:
 March 31, 2021December 31, 2020
($000 omitted)
Investments in:
Debt securities615,445 631,386 
Equity securities67,354 53,001 
682,799 684,387 
Investment gains and losses recognized related to investments in equity securities are as follows:
Three Months Ended 
 March 31,
20212020
($000 omitted)
Net investment gains (losses) recognized on equity securities during the period5,582 (11,061)
Less: Net realized gains (losses) on equity securities sold during the period9 (507)
Net unrealized investment gains (losses) recognized on equity securities still held at end of period5,573 (10,554)
Proceeds from sale of investments in securities The total fair values of the Company's investments in debt and equity securities are as follows:
 March 31, 2021December 31, 2020
($000 omitted)
Investments in:
Debt securities615,445 631,386 
Equity securities67,354 53,001 
682,799 684,387 
The amortized costs and fair values of investments in debt securities are as follows:
 March 31, 2021December 31, 2020
 
Amortized
costs
Fair
values
Amortized
costs
Fair
values
 ($000 omitted)
Municipal42,015 44,089 45,138 47,603 
Corporate276,870 289,159 285,962 305,450 
Foreign269,792 275,585 261,748 271,711 
U.S. Treasury Bonds6,567 6,612 6,564 6,622 
595,244 615,445 599,412 631,386 
Proceeds from sales of investments in securities are as follows: 
 Three Months Ended 
 March 31,
 20212020
 ($000 omitted)
Proceeds from sales of debt securities115 11,503 
Proceeds from sales of equity securities2,936 293 
Total proceeds from sales of investments in securities3,051 11,796