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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Investment portfolio: |  |
Fixed income, available-for-sale, at fair value (amortized cost, 2020 - $6,317,164; 2019 - $5,562,550) | $ 6,661,596 | $ 5,737,892
Equity securities, at fair value (cost, 2020 - $17,522; 2019 - $17,188) | 18,215 | 17,328
Other invested assets, at cost | 3,100 | 3,100
Total investment portfolio | 6,682,911 | 5,758,320
Cash and cash equivalents | 287,953 | 161,847
Restricted cash and cash equivalents | 8,727 | 7,209
Accrued investment income | 49,997 | 49,705
Reinsurance recoverable on loss reserves | 95,042 | 21,641
Reinsurance recoverable on paid losses | 669 | 1,521
Premiums receivable | 56,044 | 55,587
Home office and equipment, net | 47,144 | 50,121
Deferred insurance policy acquisition costs | 21,561 | 18,531
Other assets | 104,478 | 105,089
Total assets | 7,354,526 | 6,229,571
Liabilities: |  |
Loss reserves | 880,537 | 555,334
Unearned premiums | 287,099 | 380,302
Federal Home Loan Bank Advance | 155,000 | 155,000
Senior notes | 879,379 | 420,867
Convertible junior subordinated debentures | 208,814 | 256,872
Other liabilities | 244,711 | 151,962
Total liabilities | 2,655,540 | 1,920,337
Contingencies |  |
Shareholders' equity: |  |
Common stock (one dollar par value, shares authorized 1,000,000; shares issued 2020 - 371,353; 2019 - 371,353; outstanding 2020 - 338,573; 2019 - 347,308) | 371,353 | 371,353
Paid-in capital | 1,862,042 | 1,869,719
Treasury stock (shares at cost 2020 - 32,779; 2019 - 24,045) | (393,326) | (283,196)
Accumulated other comprehensive income, net of tax | 216,821 | 72,708
Retained earnings | 2,642,096 | 2,278,650
Total shareholders' equity | 4,698,986 | 4,309,234
Total liabilities and shareholders' equity | $ 7,354,526 | $ 6,229,571

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- Definition Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to the ceding insurer but not yet paid and amounts expected for incurred losses and settlement expenses, which have not yet been reported to the ceding insurer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=99404803&loc=d3e21412-158489 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=99397103&loc=d3e6824-158387 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (cc) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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