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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comp. Income (Loss), net
--- | --- | --- | --- | --- | ---
Common Stock, Dividends, Per Share, Cash Paid | $ 0.16 |  |  |  |
Balance at Dec. 31, 2018 | $ 3,965,940 | $ 77,484 | $ 3,107,431 | $ 833,130 | $ (52,105)
Balance (in shares) at Dec. 31, 2018 |  | 77,484,000 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Exercise of employee common stock options and related tax benefits | 130 | $ 5 | 125 |  |
Exercise of employee common stock options and related tax benefits (in shares) |  | 5,000 |  |  |
Common dividends paid | (12,545) |  |  | (12,545) |
Repurchase of common stock | (30,049) | $ (543) | (29,506) |  |
Repurchase of common stock (in shares) |  | (543,000) |  |  |
Issuance of restricted common shares, net of forfeitures | 0 | $ 180 | (180) |  |
Issuance of restricted common shares, net of forfeitures (in shares) |  | 180,000 |  |  |
Restricted shares withheld for taxes & related tax benefit | (3,487) | $ (62) | (3,425) |  |
Restricted shares withheld for taxes (in shares) |  | (62,000) |  |  |
Stock-based compensation expense | 4,913 |  | 4,913 |  |
Net income | 93,960 |  |  | 93,960 |
Other comprehensive income (loss) | 37,077 |  |  |  | 37,077
Balance at Mar. 31, 2019 | $ 4,055,939 | $ 77,064 | 3,079,358 | 914,545 | (15,028)
Balance (in shares) at Mar. 31, 2019 |  | 77,064,000 |  |  |
Common Stock, Dividends, Per Share, Cash Paid | $ 0.16 |  |  |  |
Balance at Dec. 31, 2019 | $ 4,355,748 | $ 76,564 | 3,064,467 | 1,184,183 | 30,534
Balance (in shares) at Dec. 31, 2019 |  | 76,564,000 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Exercise of employee common stock options and related tax benefits | 5 | $ 1 | 4 |  |
Exercise of employee common stock options and related tax benefits (in shares) |  | 1,000 |  |  |
Common dividends paid | (12,442) |  |  | (12,442) |
Repurchase of common stock | (50,790) | $ (1,015) | (49,775) |  |
Repurchase of common stock (in shares) |  | (1,015,000) |  |  |
Issuance of restricted common shares, net of forfeitures | 0 | $ 198 | (198) |  |
Issuance of restricted common shares, net of forfeitures (in shares) |  | 198,000 |  |  |
Issuance of common stock pursuant to performance-based vesting restricted stock units, net of shares withheld for taxes and related tax benefit | 2,468 | $ 84 | (2,552) |  |
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes and related tax benefit (in shares) |  | 84,000 |  |  |
Restricted shares withheld for taxes & related tax benefit | (1,958) | $ (32) | (1,926) |  |
Restricted shares withheld for taxes (in shares) |  | (32,000) |  |  |
Stock-based compensation expense | 5,501 |  | 5,501 |  |
Net income | 28,356 |  |  | 28,356 |
Other comprehensive income (loss) | 94,972 |  |  |  | 94,972
Balance at Mar. 31, 2020 | 4,385,128 | $ 75,800 | $ 3,015,521 | 1,168,301 | $ 125,506
Balance (in shares) at Mar. 31, 2020 |  | 75,800,000 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption | $ (31,796) |  |  | $ (31,796) |

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