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Consolidated Statements of Shareholders' Equity Statement - USD ($) $ in Thousands | Total | Cumulative Effect, Period of Adoption, Adjustment | Cumulative Effect, Period of Adoption, Adjusted Balance | Preferred Stock | Preferred Stock Cumulative Effect, Period of Adoption, Adjusted Balance | Preferred Stock Including Additional Paid in Capital | Preferred Stock Including Additional Paid in Capital Cumulative Effect, Period of Adoption, Adjusted Balance | Common Stock | Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance | Additional Paid-in Capital | Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjusted Balance | Accumulated Other Comprehensive Income (Loss) | Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance | Accumulated Deficit | Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment | Accumulated Deficit Cumulative Effect, Period of Adoption, Adjusted Balance
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Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption accounting standard 2019-05 | $ 582,988 | $ (548) | $ 582,440 |  |  | $ 162,807 | $ 162,807 | $ 229 | $ 229 | $ 858,347 | $ 858,347 | $ 173,806 | $ 173,806 | $ (612,201) | $ (548) | $ (612,749)
Balance, Preferred shares outstanding (in shares) at Dec. 31, 2019 |  |  |  | 6,788,330 | 6,788,330 |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Dec. 31, 2019 |  |  |  |  |  |  |  | 22,945,993 | 22,945,993 |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuance, shares |  |  |  | 4,460,000 |  |  |  |  |  |  |  |  |  |  |  |
Stock Redeemed or Called During Period, Shares |  |  |  | (4,000,000) |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock granted, net of amortization |  |  |  |  |  |  |  | 67,511 |  |  |  |  |  |  |  |
Stock Repurchased During Period, Shares |  |  |  |  |  |  |  | (18,782) |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  |  |  | (12,744) |  |  |  |  |  |  |  |
Balance, Preferred shares outstanding (in shares) at Mar. 31, 2020 |  |  |  | 7,248,330 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Mar. 31, 2020 |  |  |  |  |  |  |  | 22,981,978 |  |  |  |  |  |  |  |
Balance at Dec. 31, 2019 | 582,988 | (548) | 582,440 |  |  | 162,807 | 162,807 | $ 229 | $ 229 | 858,347 | 858,347 | 173,806 | 173,806 | (612,201) | (548) | (612,749)
Balance at Dec. 31, 2019 | (582,988) | 548 | (582,440) |  |  | (162,807) | (162,807) | (229) | $ (229) | (858,347) | (858,347) | (173,806) | (173,806) | 612,201 | 548 | 612,749
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuance, value | 107,988 |  |  |  |  | 107,988 |  |  |  |  |  |  |  |  |  |
Stock Redeemed or Called During Period, Value | (100,000) |  |  |  |  | (96,086) |  |  |  |  |  |  |  |  |  |
Preferred stock redemption charge |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,914) |  |
Restricted stock granted, net of amortization | 307 |  |  |  |  |  |  | 1 |  | 306 |  |  |  |  |  |
Stock Repurchased During Period, Value | (206) |  |  |  |  |  |  | 0 |  | (206) |  |  |  |  |  |
Adjustments for tax withholding on share-based compensation | (235) |  |  |  |  |  |  | 0 |  | (235) |  |  |  |  |  |
Stock issuance costs | (9) |  |  |  |  |  |  |  |  | (9) |  |  |  |  |  |
Net income | (98,479) |  |  |  |  |  |  |  |  |  |  |  |  | (98,479) |  |
Dividends on preferred stock | (3,841) |  |  |  |  |  |  |  |  |  |  |  |  | (3,841) |  |
Dividends on common stock | (10,330) |  |  |  |  |  |  |  |  |  |  |  |  | (10,330) |  |
Other Comprehensive Income (Loss), Net of Tax | 72,972 |  |  |  |  |  |  |  |  |  |  | 72,972 |  |  |  |
Balance at Mar. 31, 2020 | 550,607 |  |  |  |  | 174,709 |  | $ 230 |  | 858,203 |  | 246,778 |  | (729,313) |  |
Balance, Preferred shares outstanding (in shares) at Dec. 31, 2019 |  |  |  | 6,788,330 | 6,788,330 |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Dec. 31, 2019 |  |  |  |  |  |  |  | 22,945,993 | 22,945,993 |  |  |  |  |  |  |
Balance, Preferred shares outstanding (in shares) at Sep. 30, 2020 |  |  |  | 7,248,330 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Sep. 30, 2020 |  |  |  |  |  |  |  | 23,145,238 |  |  |  |  |  |  |  |
Balance at Dec. 31, 2019 | 582,988 | (548) | 582,440 |  |  | 162,807 | 162,807 | $ 229 | $ 229 | 858,347 | 858,347 | 173,806 | 173,806 | (612,201) | (548) | (612,749)
Balance at Dec. 31, 2019 | (582,988) | $ 548 | $ (582,440) |  |  | (162,807) | $ (162,807) | (229) | $ (229) | (858,347) | $ (858,347) | (173,806) | $ (173,806) | 612,201 | $ 548 | $ 612,749
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock redemption charge | (3,914) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | (85,077) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at Sep. 30, 2020 | 603,553 |  |  |  |  | 174,709 |  | 231 |  | 859,089 |  | 88,729 |  | (519,205) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends | (10,346) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption accounting standard 2019-05 | 550,607 |  |  |  |  | 174,709 |  | $ 230 |  | 858,203 |  | 246,778 |  | (729,313) |  |
Balance, Preferred shares outstanding (in shares) at Mar. 31, 2020 |  |  |  | 7,248,330 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Mar. 31, 2020 |  |  |  |  |  |  |  | 22,981,978 |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock granted, net of amortization |  |  |  |  |  |  |  | 172,782 |  |  |  |  |  |  |  |
Stock Repurchased During Period, Shares |  |  |  |  |  |  |  | (14,143) |  |  |  |  |  |  |  |
Balance, Preferred shares outstanding (in shares) at Jun. 30, 2020 |  |  |  | 7,248,330 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Jun. 30, 2020 |  |  |  |  |  |  |  | 23,140,617 |  |  |  |  |  |  |  |
Balance at Mar. 31, 2020 | 550,607 |  |  |  |  | 174,709 |  | $ 230 |  | 858,203 |  | 246,778 |  | (729,313) |  |
Balance at Mar. 31, 2020 | (550,607) |  |  |  |  | (174,709) |  | (230) |  | (858,203) |  | (246,778) |  | 729,313 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock granted, net of amortization | 423 |  |  |  |  |  |  | 1 |  | 422 |  |  |  |  |  |
Stock Repurchased During Period, Value | (166) |  |  |  |  |  |  | 0 |  | (166) |  |  |  |  |  |
Stock issuance costs | (8) |  |  |  |  |  |  |  |  | (8) |  |  |  |  |  |
Net income | 194,838 |  |  |  |  |  |  |  |  |  |  |  |  | 194,838 |  |
Dividends on preferred stock | (3,253) |  |  |  |  |  |  |  |  |  |  |  |  | (3,253) |  |
Dividends on common stock | (9,925) |  |  |  |  |  |  |  |  |  |  |  |  | (9,925) |  |
Other Comprehensive Income (Loss), Net of Tax | (165,047) |  |  |  |  |  |  |  |  |  |  | (165,047) |  |  |  |
Balance at Jun. 30, 2020 | 567,469 |  |  |  |  | 174,709 |  | 231 |  | 858,451 |  | 81,731 |  | (547,653) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption accounting standard 2019-05 | 567,469 |  |  |  |  | 174,709 |  | $ 231 |  | 858,451 |  | 81,731 |  | (547,653) |  |
Stock issuance, shares |  |  |  |  |  |  |  | 5,219 |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  |  |  | (598) |  |  |  |  |  |  |  |
Balance, Preferred shares outstanding (in shares) at Sep. 30, 2020 |  |  |  | 7,248,330 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Sep. 30, 2020 |  |  |  |  |  |  |  | 23,145,238 |  |  |  |  |  |  |  |
Balance at Jun. 30, 2020 | (567,469) |  |  |  |  | (174,709) |  | $ (231) |  | (858,451) |  | (81,731) |  | 547,653 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuance, value | 85 |  |  |  |  |  |  | 0 |  | 85 |  |  |  |  |  |
Preferred stock redemption charge | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock granted, net of amortization | 568 |  |  |  |  |  |  |  |  | 568 |  |  |  |  |  |
Adjustments for tax withholding on share-based compensation | (10) |  |  |  |  |  |  |  |  | (10) |  |  |  |  |  |
Stock issuance costs | (5) |  |  |  |  |  |  |  |  | (5) |  |  |  |  |  |
Net income | 40,725 |  |  |  |  |  |  |  |  |  |  |  |  | 40,725 |  |
Dividends on preferred stock | (3,252) |  |  |  |  |  |  |  |  |  |  |  |  | (3,252) |  |
Dividends on common stock | (9,025) |  |  |  |  |  |  |  |  |  |  |  |  | (9,025) |  |
Other Comprehensive Income (Loss), Net of Tax | 6,998 |  |  |  |  |  |  |  |  |  |  | 6,998 |  |  |  |
Balance at Sep. 30, 2020 | 603,553 |  |  |  |  | 174,709 |  | 231 |  | 859,089 |  | 88,729 |  | (519,205) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends | (3,252) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption accounting standard 2019-05 | 603,553 |  |  |  |  | 174,709 |  | 231 |  | 859,089 |  | 88,729 |  | (519,205) |  |
Cumulative effect of adoption accounting standard 2019-05 | $ 633,453 |  |  |  |  | 174,564 |  | $ 237 |  | 869,495 |  | 80,261 |  | (491,104) |  |
Balance, Preferred shares outstanding (in shares) at Dec. 31, 2020 | 7,248,330 |  |  | 7,248,330 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Dec. 31, 2020 | 23,697,970 |  |  |  |  |  |  | 23,697,970 |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuance, shares |  |  |  |  |  |  |  | 7,187,500 |  |  |  |  |  |  |  |
Stock Redeemed or Called During Period, Shares |  |  |  | (2,788,330) |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock granted, net of amortization |  |  |  |  |  |  |  | 16,722 |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  |  |  | (22,623) |  |  |  |  |  |  |  |
Balance, Preferred shares outstanding (in shares) at Mar. 31, 2021 |  |  |  | 4,460,000 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Mar. 31, 2021 |  |  |  |  |  |  |  | 30,879,569 |  |  |  |  |  |  |  |
Balance at Dec. 31, 2020 | $ 633,453 |  |  |  |  | 174,564 |  | $ 237 |  | 869,495 |  | 80,261 |  | (491,104) |  |
Balance at Dec. 31, 2020 | (633,453) |  |  |  |  | (174,564) |  | (237) |  | (869,495) |  | (80,261) |  | 491,104 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuance, value | 128,150 |  |  |  |  |  |  | 72 |  | 128,078 |  |  |  |  |  |
Stock Redeemed or Called During Period, Value | (69,708) |  |  |  |  | (66,721) |  |  |  |  |  |  |  |  |  |
Preferred stock redemption charge |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,987) |  |
Restricted stock granted, net of amortization | 451 |  |  |  |  |  |  | 0 |  | 451 |  |  |  |  |  |
Adjustments for tax withholding on share-based compensation | (428) |  |  |  |  |  |  | 0 |  | (428) |  |  |  |  |  |
Stock issuance costs | (270) |  |  |  |  |  |  |  |  | (270) |  |  |  |  |  |
Net income | 117,929 |  |  |  |  |  |  |  |  |  |  |  |  | 117,929 |  |
Dividends on preferred stock | (2,559) |  |  |  |  |  |  |  |  |  |  |  |  | (2,559) |  |
Dividends on common stock | (10,586) |  |  |  |  |  |  |  |  |  |  |  |  | (10,586) |  |
Other Comprehensive Income (Loss), Net of Tax | (65,156) |  |  |  |  |  |  |  |  |  |  | (65,156) |  |  |  |
Balance at Mar. 31, 2021 | $ 731,276 |  |  |  |  | 107,843 |  | $ 309 |  | 997,326 |  | 15,105 |  | (389,307) |  |
Balance, Preferred shares outstanding (in shares) at Dec. 31, 2020 | 7,248,330 |  |  | 7,248,330 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Dec. 31, 2020 | 23,697,970 |  |  |  |  |  |  | 23,697,970 |  |  |  |  |  |  |  |
Balance, Preferred shares outstanding (in shares) at Sep. 30, 2021 | 4,460,000 |  |  | 4,460,000 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Sep. 30, 2021 | 35,935,306 |  |  |  |  |  |  | 35,935,306 |  |  |  |  |  |  |  |
Balance at Dec. 31, 2020 | $ 633,453 |  |  |  |  | 174,564 |  | $ 237 |  | 869,495 |  | 80,261 |  | (491,104) |  |
Balance at Dec. 31, 2020 | (633,453) |  |  |  |  | (174,564) |  | (237) |  | (869,495) |  | (80,261) |  | 491,104 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock redemption charge | (2,987) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | (60,025) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at Sep. 30, 2021 | 773,511 |  |  |  |  | 107,843 |  | 359 |  | 1,094,296 |  | 20,236 |  | (449,223) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends | (6,405) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption accounting standard 2019-05 | 731,276 |  |  |  |  | 107,843 |  | $ 309 |  | 997,326 |  | 15,105 |  | (389,307) |  |
Balance, Preferred shares outstanding (in shares) at Mar. 31, 2021 |  |  |  | 4,460,000 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Mar. 31, 2021 |  |  |  |  |  |  |  | 30,879,569 |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuance, shares |  |  |  |  |  |  |  | 3,463,708 |  |  |  |  |  |  |  |
Restricted stock granted, net of amortization |  |  |  |  |  |  |  | 23,305 |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  |  |  | (22,016) |  |  |  |  |  |  |  |
Balance, Preferred shares outstanding (in shares) at Jun. 30, 2021 |  |  |  | 4,460,000 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Jun. 30, 2021 |  |  |  |  |  |  |  | 34,344,566 |  |  |  |  |  |  |  |
Balance at Mar. 31, 2021 | 731,276 |  |  |  |  | 107,843 |  | $ 309 |  | 997,326 |  | 15,105 |  | (389,307) |  |
Balance at Mar. 31, 2021 | (731,276) |  |  |  |  | (107,843) |  | (309) |  | (997,326) |  | (15,105) |  | 389,307 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuance, value | 68,302 |  |  |  |  |  |  | 34 |  | 68,268 |  |  |  |  |  |
Restricted stock granted, net of amortization | 444 |  |  |  |  |  |  | 0 |  | 444 |  |  |  |  |  |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 100 |  |  |  |  |  |  |  |  | 100 |  |  |  |  |  |
Adjustments for tax withholding on share-based compensation | (425) |  |  |  |  |  |  | 0 |  | (425) |  |  |  |  |  |
Stock issuance costs | (43) |  |  |  |  |  |  |  |  | (43) |  |  |  |  |  |
Net income | (43,759) |  |  |  |  |  |  |  |  |  |  |  |  | (43,759) |  |
Dividends on preferred stock | (1,923) |  |  |  |  |  |  |  |  |  |  |  |  | (1,923) |  |
Dividends on common stock | (12,613) |  |  |  |  |  |  |  |  |  |  |  |  | (12,613) |  |
Other Comprehensive Income (Loss), Net of Tax | 14,270 |  |  |  |  |  |  |  |  |  |  | 14,270 |  |  |  |
Balance at Jun. 30, 2021 | 755,629 |  |  |  |  | 107,843 |  | 343 |  | 1,065,670 |  | 29,375 |  | (447,602) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption accounting standard 2019-05 | $ 755,629 |  |  |  |  | 107,843 |  | $ 343 |  | 1,065,670 |  | 29,375 |  | (447,602) |  |
Stock issuance, shares |  |  |  |  |  |  |  | 1,590,740 |  |  |  |  |  |  |  |
Restricted stock granted, net of amortization |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Balance, Preferred shares outstanding (in shares) at Sep. 30, 2021 | 4,460,000 |  |  | 4,460,000 |  |  |  |  |  |  |  |  |  |  |  |
Balance, Common shares outstanding at Sep. 30, 2021 | 35,935,306 |  |  |  |  |  |  | 35,935,306 |  |  |  |  |  |  |  |
Balance at Jun. 30, 2021 | $ (755,629) |  |  |  |  | (107,843) |  | $ (343) |  | (1,065,670) |  | (29,375) |  | 447,602 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuance, value | 27,898 |  |  |  |  |  |  | 16 |  | 27,882 |  |  |  |  |  |
Preferred stock redemption charge | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock granted, net of amortization | 460 |  |  |  |  |  |  | 0 |  | 460 |  |  |  |  |  |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 300 |  |  |  |  |  |  |  |  | 300 |  |  |  |  |  |
Stock issuance costs | (16) |  |  |  |  |  |  |  |  | (16) |  |  |  |  |  |
Net income | 14,033 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends on common stock | (13,731) |  |  |  |  |  |  |  |  |  |  |  |  | (13,731) |  |
Other Comprehensive Income (Loss), Net of Tax | (9,139) |  |  |  |  |  |  |  |  |  |  | (9,139) |  |  |  |
Balance at Sep. 30, 2021 | 773,511 |  |  |  |  | 107,843 |  | 359 |  | 1,094,296 |  | 20,236 |  | (449,223) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends | (1,923) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption accounting standard 2019-05 | $ 773,511 |  |  |  |  | $ 107,843 |  | $ 359 |  | $ 1,094,296 |  | $ 20,236 |  | $ (449,223) |  |

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