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v3.19.1

Condensed Consolidated Statements of Changes in Common Stockholders' Equity (Unaudited) - USD ($) $ in Thousands | Total | Parent | Common Stock | Treasury Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | ASU 2016-01 Retained Earnings | ASU 2016-01 Accumulated Other Comprehensive Income (Loss) | ASU 2018-02 Retained Earnings | ASU 2018-02 Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adopting accounting standard update |  |  |  |  |  |  |  | $ 2,061 | $ 224 | $ (2,724) | $ 2,724
Balance, beginning of period at Dec. 31, 2017 |  |  | $ 233 | $ (893,888) | $ 2,754,275 | $ 1,116,333 | $ 23,085 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Shares repurchased under share repurchase program (Note 14) |  |  | 0 |  | (10,003) |  |  |  |  |  |
Repurchases of common stock under incentive plans |  |  |  | (303) |  |  |  |  |  |  |
Issuance of common stock under incentive and benefit plans |  |  |  |  | 1,433 |  |  |  |  |  |
Share-based compensation |  |  |  |  | 2,528 |  |  |  |  |  |
Net income | $ 114,486 |  |  |  |  | 114,486 |  |  |  |  |
Dividends declared |  |  |  |  |  | (540) |  |  |  |  |
Net unrealized gains (losses) on investments, net of tax | (57,511) |  |  |  |  |  | (57,511) |  |  |  |
Net foreign currency translation adjustment, net of tax |  |  |  |  |  |  | 3 |  |  |  |
Balance, end of period at Mar. 31, 2018 |  | $ 3,052,416 | 233 | (894,191) | 2,748,233 | 1,229,616 | (31,475) |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adopting accounting standard update |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 0
Balance, beginning of period at Dec. 31, 2018 | 3,488,715 |  | 231 | (894,870) | 2,724,733 | 1,719,541 | (60,920) |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Shares repurchased under share repurchase program (Note 14) |  |  | (1) |  | (31,773) |  |  |  |  |  |
Repurchases of common stock under incentive plans |  |  |  | (451) |  |  |  |  |  |  |
Issuance of common stock under incentive and benefit plans |  |  |  |  | 1,069 |  |  |  |  |  |
Share-based compensation |  |  |  |  | 3,695 |  |  |  |  |  |
Net income | 170,957 |  |  |  |  | 170,957 |  |  |  |  |
Dividends declared |  |  |  |  |  | (534) |  |  |  |  |
Net unrealized gains (losses) on investments, net of tax | 78,414 |  |  |  |  |  | 78,414 |  |  |  |
Net foreign currency translation adjustment, net of tax |  |  |  |  |  |  | 0 |  |  |  |
Balance, end of period at Mar. 31, 2019 | $ 3,710,091 | $ 3,710,091 | $ 230 | $ (895,321) | $ 2,697,724 | $ 1,889,964 | $ 17,494 |  |  |  |

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