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Schedule II - Condensed Financial Information of Registrant - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Cash and cash equivalents | $ 105,730 | $ 197,014 | $ 115,397 | $ 117,275
Fixed maturities, at fair value | 584,361 | 416,083 |  |
Equity securities, at fair value | 50,803 | 42,214 |  |
Income taxes recoverable | 3,262 | 5,420 |  |
Deferred income taxes | 10,674 | 13,912 |  |
Other assets | 4,883 | 4,563 |  |
Total assets | 1,060,007 | 993,548 |  |
LIABILITIES: |  |  |  |
Accounts payable | 3,187 | 378 |  |
Long-term debt | 15,028 | 24,050 |  |
Other accrued expenses | 37,665 | 36,424 |  |
Total liabilities | 688,817 | 700,456 |  |
STOCKHOLDERS' EQUITY: |  |  |  |
Cumulative convertible preferred stock, $.01 par value Authorized shares - 1,000 Issued shares - 10 and 10 Outstanding shares - 10 and 10 Minimum liquidation preference - $9.99 and $9.99 per share |  |  |  |
Common stock, $.01 par value Authorized shares - 55,000 Issued shares – 45,324 and 45,525 Outstanding shares – 35,052 and 35,110 | 453 | 455 |  |
Treasury shares, at cost - 10,272 and 10,415 | (86,982) | (80,802) |  |
Additional paid-in capital | 82,263 | 70,789 |  |
Accumulated other comprehensive income (loss), net of taxes | (6,408) | (4,006) |  |
Retained earnings | 381,864 | 306,656 |  |
Total stockholders' equity | 371,190 | 293,092 | 199,916 | 175,609
Total liabilities and stockholders' equity | 1,060,007 | 993,548 |  |
Parent Company [Member] |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 3,951 | 2,046 | $ 14,890 | $ 4,878
Investments in subsidiaries and undistributed earnings | 362,759 | 291,793 |  |
Fixed maturities, at fair value | 3,003 | 2,980 |  |
Equity securities, at fair value | 625 | 551 |  |
Income taxes recoverable | 3,262 | 5,420 |  |
Deferred income taxes | 10,674 | 13,912 |  |
Other assets | 1,003 | 358 |  |
Total assets | 385,277 | 317,060 |  |
LIABILITIES: |  |  |  |
Accounts payable | 50 |  |  |
Long-term debt |  | 6,851 |  |
Other accrued expenses | 14,037 | 17,117 |  |
Total liabilities | 14,087 | 23,968 |  |
STOCKHOLDERS' EQUITY: |  |  |  |
Cumulative convertible preferred stock, $.01 par value Authorized shares - 1,000 Issued shares - 10 and 10 Outstanding shares - 10 and 10 Minimum liquidation preference - $9.99 and $9.99 per share |  |  |  |
Common stock, $.01 par value Authorized shares - 55,000 Issued shares – 45,324 and 45,525 Outstanding shares – 35,052 and 35,110 | 453 | 455 |  |
Treasury shares, at cost - 10,272 and 10,415 | (86,982) | (80,802) |  |
Additional paid-in capital | 82,263 | 70,789 |  |
Accumulated other comprehensive income (loss), net of taxes | (6,408) | (4,006) |  |
Retained earnings | 381,864 | 306,656 |  |
Total stockholders' equity | 371,190 | 293,092 |  |
Total liabilities and stockholders' equity | $ 385,277 | $ 317,060 |  |

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