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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands | Total | Series B Preferred Stock | Preferred Stock | Common Stock | Treasury Stock | Additional Paid-In Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings | Retained Earnings Series B Preferred Stock
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance (in shares) at Dec. 31, 2017 |  |  | 4,000,000 | 432,376,250 | (11,087,337) |  |  |  |
Beginning Balance, issued (in shares) at Dec. 31, 2017 |  |  |  | 443,463,587 |  |  |  |  |
Beginning Balance at Dec. 31, 2017 | $ 2,474,256 |  | $ 400,000 | $ 88,693 | $ (107,644) | $ 1,222,277 | $ 2,748 | $ 868,182 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income | 339,964 |  |  |  |  |  |  | 339,964 |
Other comprehensive income, net of tax | 23,402 |  |  |  |  |  | 23,402 |  |
Total comprehensive income | $ 363,366 |  |  |  |  |  |  |  |
Reclassification resulting from the adoption of ASU No. 2018-02 |  |  |  |  |  |  | 592 | (592) |
Cash dividends: |  |  |  |  |  |  |  |  |
Preferred Stock |  | $ (11,441) |  |  |  |  |  |  | $ (11,441)
Issuance of common shares (in shares) | 6,341,950 |  |  | 6,341,950 |  |  |  |  |
Issuance of common shares | $ 21,927 |  |  | $ 1,269 |  | 20,658 |  |  |
Stock-based compensation expense | $ 25,828 |  |  |  |  | 25,828 |  |  |
Common stock repurchased (in shares) | 0 |  |  |  |  |  |  |  |
Shares repurchased related to employee stock-based compensation plans (in shares) | (3,056,746) |  |  | (3,056,746) | 3,056,746 |  |  |  |
Shares repurchased related to employee stock-based compensation plans | $ (34,653) |  |  |  | $ (34,653) |  |  |  |
Ending Balance (in shares) at Sep. 30, 2018 |  |  | 4,000,000 | 435,661,454 | (14,144,083) |  |  |  |
Ending Balance, issued (in shares) at Sep. 30, 2018 |  |  |  | 449,805,537 |  |  |  |  |
Ending Balance at Sep. 30, 2018 | 2,840,335 |  | $ 400,000 | $ 89,962 | $ (142,297) | 1,268,763 | 27,012 | 1,196,895 |
Beginning Balance (in shares) at Jun. 30, 2018 |  |  | 4,000,000 | 435,380,601 | (14,027,932) |  |  |  |
Beginning Balance, issued (in shares) at Jun. 30, 2018 |  |  |  | 449,408,533 |  |  |  |  |
Beginning Balance at Jun. 30, 2018 | 2,728,702 |  | $ 400,000 | $ 89,882 | $ (140,956) | 1,260,201 | 23,216 | 1,096,359 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income | 103,878 |  |  |  |  |  |  | 103,878 |
Other comprehensive income, net of tax | 3,526 |  |  |  |  |  | 3,526 |  |
Total comprehensive income | 107,404 |  |  |  |  |  |  |  |
Reclassification resulting from the adoption of ASU No. 2018-02 | $ 1,052 |  |  |  |  |  | 270 | 782 |
Cash dividends: |  |  |  |  |  |  |  |  |
Preferred Stock |  | (4,124) |  |  |  |  |  |  | (4,124)
Issuance of common shares (in shares) | 397,004 |  |  | 397,004 |  |  |  |  |
Issuance of common shares | $ 3,075 |  |  | $ 80 |  | 2,995 |  |  |
Stock-based compensation expense | $ 5,567 |  |  |  |  | 5,567 |  |  |
Common stock repurchased (in shares) | 0 |  |  |  |  |  |  |  |
Shares repurchased related to employee stock-based compensation plans (in shares) | (116,151) |  |  | (116,151) | 116,151 |  |  |  |
Shares repurchased related to employee stock-based compensation plans | $ (1,341) |  |  |  | $ (1,341) |  |  |  |
Ending Balance (in shares) at Sep. 30, 2018 |  |  | 4,000,000 | 435,661,454 | (14,144,083) |  |  |  |
Ending Balance, issued (in shares) at Sep. 30, 2018 |  |  |  | 449,805,537 |  |  |  |  |
Ending Balance at Sep. 30, 2018 | 2,840,335 |  | $ 400,000 | $ 89,962 | $ (142,297) | 1,268,763 | 27,012 | 1,196,895 |
Beginning Balance (in shares) at Dec. 31, 2018 |  |  | 4,000,000 | 435,681,488 | (14,174,733) |  |  |  |
Beginning Balance, issued (in shares) at Dec. 31, 2018 |  |  |  | 449,856,221 |  |  |  |  |
Beginning Balance at Dec. 31, 2018 | 2,972,656 |  | $ 400,000 | $ 89,972 | $ (142,591) | 1,274,635 | 10,623 | 1,340,017 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income | 436,924 |  |  |  |  |  |  | 436,924 |
Other comprehensive income, net of tax | (30,806) |  |  |  |  |  | (30,806) |  |
Total comprehensive income | 406,118 |  |  |  |  |  |  |  |
Cash dividends: |  |  |  |  |  |  |  |  |
Common Stock | $ (38,485) |  |  |  |  |  |  | (38,485) |
Preferred Stock |  | (12,952) |  |  |  |  |  |  | (12,952)
Dividend equivalent units related to employee stock-based compensation plans |  |  |  |  |  | 5 |  | (5) |
Issuance of common shares (in shares) | 3,677,821 |  |  | 3,677,821 |  |  |  |  |
Issuance of common shares | $ 3,119 |  |  | $ 735 |  | 2,384 |  |  |
Stock-based compensation expense | $ 24,779 |  |  |  |  | 24,604 |  | 175 |
Common stock repurchased (in shares) | (15,861,718) |  |  | (15,861,718) | 15,861,718 |  |  |  |
Common stock repurchased | $ (157,597) |  |  |  | $ (157,597) |  |  |  |
Shares repurchased related to employee stock-based compensation plans (in shares) | (1,328,665) |  |  | (1,328,665) | 1,328,665 |  |  |  |
Shares repurchased related to employee stock-based compensation plans | $ (14,506) |  |  |  | $ (14,506) |  |  |  |
Ending Balance (in shares) at Sep. 30, 2019 |  |  | 4,000,000 | 422,168,926 | (31,365,116) |  |  |  |
Ending Balance, issued (in shares) at Sep. 30, 2019 |  |  |  | 453,534,042 |  |  |  |  |
Ending Balance at Sep. 30, 2019 | 3,183,132 |  | $ 400,000 | $ 90,707 | $ (314,694) | 1,301,628 | (20,183) | 1,725,674 |
Beginning Balance (in shares) at Jun. 30, 2019 |  |  | 4,000,000 | 426,594,990 | (26,912,915) |  |  |  |
Beginning Balance, issued (in shares) at Jun. 30, 2019 |  |  |  | 453,507,905 |  |  |  |  |
Beginning Balance at Jun. 30, 2019 | 3,097,316 |  | $ 400,000 | $ 90,702 | $ (277,071) | 1,296,409 | (13,579) | 1,600,855 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income | 128,458 |  |  |  |  |  |  | 128,458 |
Other comprehensive income, net of tax | (6,604) |  |  |  |  |  | (6,604) |  |
Total comprehensive income | 121,854 |  |  |  |  |  |  |  |
Cash dividends: |  |  |  |  |  |  |  |  |
Preferred Stock |  | $ (4,153) |  |  |  |  |  |  | $ (4,153)
Common stock dividend accrual adjustment | $ 339 |  |  |  |  |  |  | 339 |
Issuance of common shares (in shares) | 26,137 |  |  | 26,137 |  |  |  |  |
Issuance of common shares | $ 92 |  |  | $ 5 |  | 87 |  |  |
Stock-based compensation expense | $ 5,307 |  |  |  |  | 5,132 |  | 175 |
Common stock repurchased (in shares) | (4,436,963) |  |  | (4,436,963) | 4,436,963 |  |  |  |
Common stock repurchased | $ (37,477) |  |  |  | $ (37,477) |  |  |  |
Shares repurchased related to employee stock-based compensation plans (in shares) | (15,238) |  |  | (15,238) | 15,238 |  |  |  |
Shares repurchased related to employee stock-based compensation plans | $ (146) |  |  |  | $ (146) |  |  |  |
Ending Balance (in shares) at Sep. 30, 2019 |  |  | 4,000,000 | 422,168,926 | (31,365,116) |  |  |  |
Ending Balance, issued (in shares) at Sep. 30, 2019 |  |  |  | 453,534,042 |  |  |  |  |
Ending Balance at Sep. 30, 2019 | $ 3,183,132 |  | $ 400,000 | $ 90,707 | $ (314,694) | $ 1,301,628 | $ (20,183) | $ 1,725,674 |

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- Definition Amount of decrease of par value, additional paid in capital (APIC) and retained earnings of common and preferred stock retired from treasury when treasury stock is accounted for under the cost method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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