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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands | Total | Preferred Stock | Common Stock | Additional Paid-in Capital | Retained Earnings | AOCI Attributable to Parent | Accounting Standards Update 2016-13 | Accounting Standards Update 2016-13 Retained Earnings
--- | --- | --- | --- | --- | --- | --- | --- | ---
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 & 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 restricted stock unit agreement, net of shares withheld for taxes & related tax benefits | (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 benefits | (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 |  |  |
Cumulative effect of change in accounting principle |  |  |  |  |  |  | $ (31,796) | $ (31,796)
Other comprehensive income (loss) | 94,972 |  |  |  |  | 94,972 |  |
Balance at Mar. 31, 2020 | 4,385,128 | $ 0 | $ 75,800 | 3,015,521 | 1,168,301 | 125,506 |  |
Balance (in shares) at Mar. 31, 2020 |  |  | 75,800,000 |  |  |  |  |
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] |  |  |  |  |  |  |  |
Stock-based compensation expense | 9,649 |  |  |  |  |  |  |
Net income | 90,800 |  |  |  |  |  |  |
Other comprehensive income (loss) | 133,992 |  |  |  |  |  |  |
Balance at Jun. 30, 2020 | $ 4,695,647 | 217,632 | $ 75,836 | 3,019,286 | 1,218,367 | 164,526 |  |
Balance (in shares) at Jun. 30, 2020 |  |  | 75,836,000 |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid | $ 0.16 |  |  |  |  |  |  |
Balance at Mar. 31, 2020 | $ 4,385,128 | 0 | $ 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] |  |  |  |  |  |  |  |
Issuance of preferred stock, net of issuance costs | 217,632 | 217,632 |  |  |  |  |  |
Exercise of employee common stock options & related tax benefits | 225 |  | $ 9 | 216 |  |  |  |
Exercise of employee common stock options and related tax benefits (in shares) |  |  | 9,000 |  |  |  |  |
Common dividends paid | (12,378) |  |  |  | (12,378) |  |  |
Issuance of restricted common shares, net of forfeitures | 0 |  | $ 38 | (38) |  |  |  |
Issuance of restricted common shares, net of forfeitures (in shares) |  |  | 38,000 |  |  |  |  |
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes & related tax benefits | 19 |  | $ 2 | (21) |  |  |  |
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes and related tax benefit (in shares) |  |  | 2,000 |  |  |  |  |
Restricted shares withheld for taxes & related benefits | (553) |  | $ (13) | (540) |  |  |  |
Restricted shares withheld for taxes (in shares) |  |  | (13,000) |  |  |  |  |
Stock-based compensation expense | 4,148 |  |  | 4,148 |  |  |  |
Net income | 62,444 |  |  |  | 62,444 |  |  |
Other comprehensive income (loss) | 39,020 |  |  |  |  | 39,020 |  |
Balance at Jun. 30, 2020 | $ 4,695,647 | 217,632 | $ 75,836 | 3,019,286 | 1,218,367 | 164,526 |  |
Balance (in shares) at Jun. 30, 2020 |  |  | 75,836,000 |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid | $ 0.18 |  |  |  |  |  |  |
Preferred Stock, Dividends, Per Share, Cash Paid | $ 16.88 |  |  |  |  |  |  |
Balance at Dec. 31, 2020 | $ 4,904,611 | 217,126 | $ 75,850 | 3,028,063 | 1,407,723 | 175,849 |  |
Balance (in shares) at Dec. 31, 2020 |  |  | 75,850,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Preferred dividends paid | (3,798) |  |  |  | (3,798) |  |  |
Exercise of employee common stock options & related tax benefits | 304 |  | $ 13 | 291 |  |  |  |
Exercise of employee common stock options and related tax benefits (in shares) |  |  | 13,000 |  |  |  |  |
Common dividends paid | (13,902) |  |  |  | (13,902) |  |  |
Issuance of restricted common shares, net of forfeitures | 0 |  | $ 172 | (172) |  |  |  |
Issuance of restricted common shares, net of forfeitures (in shares) |  |  | 172,000 |  |  |  |  |
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes & related tax benefits | (3,762) |  | $ 86 | (3,848) |  |  |  |
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes and related tax benefit (in shares) |  |  | 86,000 |  |  |  |  |
Restricted shares withheld for taxes & related benefits | (2,456) |  | $ (34) | (2,422) |  |  |  |
Restricted shares withheld for taxes (in shares) |  |  | (34,000) |  |  |  |  |
Stock-based compensation expense | 5,399 |  |  | 5,399 |  |  |  |
Net income | 125,428 |  |  |  | 125,428 |  |  |
Other comprehensive income (loss) | (52,301) |  |  |  |  | (52,301) |  |
Balance at Mar. 31, 2021 | 4,959,523 | 217,126 | $ 76,087 | 3,027,311 | 1,515,451 | 123,548 |  |
Balance (in shares) at Mar. 31, 2021 |  |  | 76,087,000 |  |  |  |  |
Balance at Dec. 31, 2020 | 4,904,611 | 217,126 | $ 75,850 | 3,028,063 | 1,407,723 | 175,849 |  |
Balance (in shares) at Dec. 31, 2020 |  |  | 75,850,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Stock-based compensation expense | 11,068 |  |  |  |  |  |  |
Net income | 257,218 |  |  |  |  |  |  |
Other comprehensive income (loss) | (29,750) |  |  |  |  |  |  |
Balance at Jun. 30, 2021 | $ 5,101,231 | 217,126 | $ 76,088 | 3,032,338 | 1,629,580 | 146,099 |  |
Balance (in shares) at Jun. 30, 2021 |  |  | 76,088,000 |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid | $ 0.18 |  |  |  |  |  |  |
Preferred Stock, Dividends, Per Share, Cash Paid | $ 16.88 |  |  |  |  |  |  |
Balance at Mar. 31, 2021 | $ 4,959,523 | 217,126 | $ 76,087 | 3,027,311 | 1,515,451 | 123,548 |  |
Balance (in shares) at Mar. 31, 2021 |  |  | 76,087,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Preferred dividends paid | (3,798) |  |  |  | (3,798) |  |  |
Exercise of employee common stock options & related tax benefits | 100 |  | $ 5 | 95 |  |  |  |
Exercise of employee common stock options and related tax benefits (in shares) |  |  | 5,000 |  |  |  |  |
Common dividends paid | (13,863) |  |  |  | (13,863) |  |  |
Issuance of restricted common shares, net of forfeitures | 0 |  | $ 3 | (3) |  |  |  |
Issuance of restricted common shares, net of forfeitures (in shares) |  |  | 3,000 |  |  |  |  |
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes & related tax benefits | 2 |  | $ 1 | (3) |  |  |  |
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes and related tax benefit (in shares) |  |  | 1,000 |  |  |  |  |
Restricted shares withheld for taxes & related benefits | (739) |  | $ (8) | (731) |  |  |  |
Restricted shares withheld for taxes (in shares) |  |  | (8,000) |  |  |  |  |
Stock-based compensation expense | 5,669 |  |  | 5,669 |  |  |  |
Net income | 131,790 |  |  |  | 131,790 |  |  |
Other comprehensive income (loss) | 22,551 |  |  |  |  | 22,551 |  |
Balance at Jun. 30, 2021 | $ 5,101,231 | $ 217,126 | $ 76,088 | $ 3,032,338 | $ 1,629,580 | $ 146,099 |  |
Balance (in shares) at Jun. 30, 2021 |  |  | 76,088,000 |  |  |  |  |

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