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Schedule II. Condensed Financial Information of Registrant - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Assets |  |  |  |
Fixed maturity securities—held-to-maturity, at amortized cost net of allowance for credit losses of $0 in 2020 and 2019, (fair value $361 and $0, in 2020 and 2019, respectively) | $ 585,130 | $ 599,421 |  |
Fixed maturity securities—available-for-sale, at fair value (amortized cost $7,210 in 2020 and 2019) | 414,279 | 441,146 |  |
Equity securities, at fair value (cost $10,007 in 2020 and 2019) | 43,437 | 27,903 |  |
Short-term investments | 45,898 | 56,548 |  |
Total investments | 1,088,744 | 1,125,018 |  |
Cash and cash equivalents | 61,757 | 43,813 |  |
Property and equipment, net | 6,182 | 6,331 |  |
Other assets | 10,860 | 17,587 |  |
Total assets | 1,470,855 | 1,492,906 |  |
Liabilities: |  |  |  |
Accounts payable and other liabilities | 38,880 | 40,089 |  |
Total liabilities | 1,032,039 | 1,062,691 |  |
Shareholders' equity (net of Treasury stock of $22,370 at December 31, 2020 and 2019) | 438,816 | 430,215 | $ 409,762 | $ 425,423
Total liabilities and shareholders’ equity | 1,470,855 | 1,492,906 |  |
Parent Company [Member] |  |  |  |
Assets |  |  |  |
Fixed maturity securities—held-to-maturity, at amortized cost net of allowance for credit losses of $0 in 2020 and 2019, (fair value $361 and $0, in 2020 and 2019, respectively) | 361 |  |  |
Fixed maturity securities—available-for-sale, at fair value (amortized cost $7,210 in 2020 and 2019) | 7,259 | 7,216 |  |
Equity securities, at fair value (cost $10,007 in 2020 and 2019) | 11,503 | 11,779 |  |
Short-term investments | 9,676 | 17,967 |  |
Investment in subsidiaries | 384,774 | 379,001 |  |
Total investments | 413,573 | 415,963 |  |
Cash and cash equivalents | 23,562 | 10,551 |  |
Notes receivable from subsidiaries | 2,140 | 2,781 |  |
Property and equipment, net | 1,605 | 1,720 |  |
Federal income tax recoverable | 2,705 | 2,798 |  |
Other assets | 1,420 | 804 |  |
Total assets | 445,005 | 434,617 |  |
Liabilities: |  |  |  |
Accounts payable and other liabilities | 6,095 | 4,230 |  |
Deferred income taxes | 94 | 172 |  |
Total liabilities | 6,189 | 4,402 |  |
Shareholders' equity (net of Treasury stock of $22,370 at December 31, 2020 and 2019) | 438,816 | 430,215 |  |
Total liabilities and shareholders’ equity | $ 445,005 | $ 434,617 |  |

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