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Consolidated Statements of Equity - USD ($) $ in Thousands | Total | Preferred stock | Common stock | Other paid-in capital | Retained earnings | Accumulated other comprehensive loss | Treasury stock
--- | --- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2016 |  | 150,000 |  |  |  |  |
Balance (in shares) at Dec. 31, 2016 |  |  | 195,843,297 |  |  |  |
Treasury stock (in shares) at Dec. 31, 2016 |  |  |  |  |  |  | (538,921)
Balance at Dec. 31, 2016 | $ 2,316,244 | $ 15,000 | $ 195,843 | $ 1,232,478 | $ 912,282 | $ (35,733) | $ (3,626)
Net income | 165,891 |  |  |  | 165,891 |  |
Other comprehensive income | 392 |  |  |  |  | 392 |
Dividends declared on preferred stocks | (171) |  |  |  | (171) |  |
Dividends declared on common stock | (112,788) |  |  |  | (112,788) |  |
Stock-based compensation | 2,390 |  |  | 2,729 | (339) |  |
Repurchase of common stock |  |  |  |  |  |  | (64,384)
Repurchase of common stock | (1,684) |  |  |  |  |  | $ (1,684)
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings |  |  |  | (2,441) |  |  |
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings (in shares) |  |  |  |  |  |  | 64,384
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings |  |  |  |  |  |  | $ 1,684
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings | (757) |  |  |  |  |  |
Redemption of preferred stock (shares) |  | (150,000) |  |  |  |  |
Redemption of preferred stock |  | $ (15,000) |  |  |  |  |
Redemption of preferred stock | (600) |  |  |  | (600) |  |
Redemption of preferred stock | $ (15,600) |  |  |  |  |  |
Balance (in shares) at Sep. 30, 2017 |  | 0 |  |  |  |  |
Balance (in shares) at Sep. 30, 2017 | 195,843,297 |  | 195,843,297 |  |  |  |
Treasury stock (in shares) at Sep. 30, 2017 |  |  |  |  |  |  | (538,921)
Balance at Sep. 30, 2017 | $ 2,353,917 | $ 0 | $ 195,843 | 1,232,766 | 964,275 | (35,341) | $ (3,626)
Balance at Jun. 30, 2017 |  |  |  |  |  | (35,789) |
Net income | 87,351 |  |  |  |  |  |
Other comprehensive income | 448 |  |  |  |  | 448 |
Redemption of preferred stock | $ 0 |  |  |  |  |  |
Balance (in shares) at Sep. 30, 2017 |  | 0 |  |  |  |  |
Balance (in shares) at Sep. 30, 2017 | 195,843,297 |  | 195,843,297 |  |  |  |
Treasury stock (in shares) at Sep. 30, 2017 |  |  |  |  |  |  | (538,921)
Balance at Sep. 30, 2017 | $ 2,353,917 | $ 0 | $ 195,843 | 1,232,766 | 964,275 | (35,341) | $ (3,626)
Cumulative effect of adoption of ASU 2014-09 | Accounting Standards Update 2014-09 | (970) |  |  |  | (970) |  |
Adjusted balance at January 1, 2018 | $ 2,428,073 |  | $ 195,843 | 1,233,412 | 1,039,778 | (37,334) | $ (3,626)
Balance (in shares) at Dec. 31, 2017 | 195,843,297 |  | 195,843,297 |  |  |  |
Treasury stock (in shares) at Dec. 31, 2017 |  |  |  |  |  |  | (538,921)
Balance at Dec. 31, 2017 | $ 2,429,043 |  | $ 195,843 | 1,233,412 | 1,040,748 | (37,334) | $ (3,626)
Net income | 193,490 |  |  |  | 193,490 |  |
Other comprehensive income | 1,674 |  |  |  |  | 1,674 |
Reclassification of certain prior period tax effects from accumulated other comprehensive loss | Adjustments for new accounting pronouncement | 0 |  |  |  | 7,959 | (7,959) |
Dividends declared on common stock | (115,998) |  |  |  | (115,998) |  |
Stock-based compensation | 3,411 |  |  | 3,810 | (399) |  |
Repurchase of common stock |  |  |  |  |  |  | (182,424)
Repurchase of common stock | (5,020) |  |  |  |  |  | $ (5,020)
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings |  |  |  | (7,350) |  |  |
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings (in shares) |  |  |  |  |  |  | 182,424
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings |  |  |  |  |  |  | $ 5,020
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings | (2,330) |  |  |  |  |  |
Issuance of common stock (shares) |  |  | 713,948 |  |  |  |
Issuance of common stock | 17,993 |  | $ 714 | 17,279 |  |  |
Redemption of preferred stock | 0 |  |  |  |  |  |
Redemption of preferred stock | $ 0 |  |  |  |  |  |
Balance (in shares) at Sep. 30, 2018 | 196,557,245 |  | 196,557,245 |  |  |  |
Treasury stock (in shares) at Sep. 30, 2018 |  |  |  |  |  |  | (538,921)
Balance at Sep. 30, 2018 | $ 2,521,293 |  | $ 196,557 | 1,247,151 | 1,124,830 | (43,619) | $ (3,626)
Balance at Jun. 30, 2018 |  |  |  |  |  | (44,135) |
Net income | 107,251 |  |  |  |  |  |
Other comprehensive income | 516 |  |  |  |  | 516 |
Redemption of preferred stock | $ 0 |  |  |  |  |  |
Balance (in shares) at Sep. 30, 2018 | 196,557,245 |  | 196,557,245 |  |  |  |
Treasury stock (in shares) at Sep. 30, 2018 |  |  |  |  |  |  | (538,921)
Balance at Sep. 30, 2018 | $ 2,521,293 |  | $ 196,557 | $ 1,247,151 | $ 1,124,830 | $ (43,619) | $ (3,626)

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