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Schedule II Condensed Financial Information of Registrant - Condensed Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
ASSETS |  |  |
Investment in subsidiaries | $ 328,516 | $ 247,266 |
Other assets | 422,047 | 381,182 |
Total assets | 11,031,896 | 11,198,340 | $ 10,576,824
LIABILITIES AND SHAREHOLDERS' EQUITY |  |  |
Long-term debt | 297,740 | 297,469 |
Other liabilities | 290,358 | 341,053 |
Total liabilities | 9,741,346 | 9,696,767 |
Preferred stock, $0.001 par value, authorized 1,000,000 shares; none issued | 0 | 0 |
Common stock, $0.001 par value, authorized 75,000,000 shares; issued, 2018, 65,820,369; 2017, 65,439,245 | 66 | 65 |
Additional paid-in capital | 475,109 | 464,246 |
Retained earnings | 1,216,582 | 1,231,177 |
Accumulated other comprehensive income (loss), net of taxes: |  |  |
Net unrealized investment gains on securities | 96,941 | 300,177 |
Net funded status of pension benefit obligations | (12,185) | (13,217) |
Treasury stock, at cost, 2018, 24,850,484 shares; 2017, 24,721,372 shares | (485,963) | (480,875) |
Total shareholders' equity | 1,290,550 | 1,501,573 | $ 1,293,982
Total liabilities and shareholders' equity | 11,031,896 | 11,198,340 |
Parent Company [Member] |  |  |
ASSETS |  |  |
Investments and cash | 5,255 | 6,464 |
Investment in subsidiaries | 1,473,538 | 1,685,390 |
Other assets | 66,138 | 66,445 |
Total assets | 1,544,931 | 1,758,299 |
LIABILITIES AND SHAREHOLDERS' EQUITY |  |  |
Long-term debt | 247,740 | 247,469 |
Other liabilities | 6,641 | 9,257 |
Total liabilities | 254,381 | 256,726 |
Preferred stock, $0.001 par value, authorized 1,000,000 shares; none issued | 0 | 0 |
Common stock, $0.001 par value, authorized 75,000,000 shares; issued, 2018, 65,820,369; 2017, 65,439,245 | 66 | 65 |
Additional paid-in capital | 475,109 | 464,246 |
Retained earnings | 1,216,582 | 1,231,177 |
Accumulated other comprehensive income (loss), net of taxes: |  |  |
Net unrealized investment gains on securities | 96,941 | 300,177 |
Net funded status of pension benefit obligations | (12,185) | (13,217) |
Treasury stock, at cost, 2018, 24,850,484 shares; 2017, 24,721,372 shares | (485,963) | (480,875) |
Total shareholders' equity | 1,290,550 | 1,501,573 |
Total liabilities and shareholders' equity | $ 1,544,931 | $ 1,758,299 |

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