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v3.19.1

Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands | Common Shares Outstanding [Member] | Common Shares [Member] | Additional Paid-In Capital [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Retained Earnings [Member] | Treasury Shares At Cost [Member] | Total
--- | --- | --- | --- | --- | --- | --- | ---
Change to beginning balance due to adoption of Accounting Standards Update 2016-01 |  |  |  | $ (1,201) | $ 1,201 |  | $ (1,201)
Balance, beginning of period, shares at Dec. 31, 2017 | 40,835,272 |  |  |  |  |  |
Issued during the period, net, shares | 143,362 |  |  |  |  |  |
Balance, end of period, shares at Mar. 31, 2018 | 40,978,634 |  |  |  |  |  |
Balance, beginning of period at Dec. 31, 2017 |  | $ 691 | $ 2,165,768 | (160,891) | 9,685,908 | $ (3,322,244) |
Issued during the period, net |  | 1 |  |  |  |  |
Share-based compensation plans |  |  | (2,249) |  |  |  |
Net increase (decrease) during the period |  |  |  | (179,882) |  |  | (179,882)
Net income (loss) |  |  |  |  | 210,318 |  | 210,318
Dividends declared ($1.40 per share in 2019 and $1.30 per share in 2018) |  |  |  |  | (53,240) |  | (53,240)
Purchase of treasury shares |  |  |  |  |  |  |
Balance, end of period at Mar. 31, 2018 |  | 692 | 2,163,519 | (341,974) | 9,844,187 | (3,322,244) | $ 8,344,180
Balance, beginning of period, shares at Dec. 31, 2017 | 40,835,272 |  |  |  |  |  |
Balance, end of period, shares at Dec. 31, 2018 | 40,651,148 |  |  |  |  |  | 69,202,000
Balance, beginning of period at Dec. 31, 2017 |  | 691 | 2,165,768 | (160,891) | 9,685,908 | (3,322,244) |
Balance, end of period at Dec. 31, 2018 |  | 692 | 2,188,777 | (462,557) | 9,574,440 | (3,397,548) | $ 7,903,804
Issued during the period, net, shares | 194,584 |  |  |  |  |  |
Treasury shares acquired, shares | (75,193) |  |  |  |  |  |
Balance, end of period, shares at Mar. 31, 2019 | 40,770,539 |  |  |  |  |  | 69,396,000
Issued during the period, net |  | 2 |  |  |  |  |
Share-based compensation plans |  |  | 767 |  |  |  |
Net increase (decrease) during the period |  |  |  | 246,446 |  |  | $ 246,446
Net income (loss) |  |  |  |  | 348,900 |  | 348,900
Dividends declared ($1.40 per share in 2019 and $1.30 per share in 2018) |  |  |  |  | (57,137) |  | (57,137)
Purchase of treasury shares |  |  |  |  |  | (16,153) |
Balance, end of period at Mar. 31, 2019 |  | $ 694 | $ 2,189,544 | $ (216,111) | $ 9,866,203 | $ (3,413,701) | $ 8,426,629

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