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Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Treasury Stock [Member] | AOCI Attributable to Parent [Member] | Noncontrolling Interest [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2017 | $ 4,537,090 | $ 1,779 | $ 720,115 | $ 4,474,064 | $ (662,854) | $ (1,910) | $ 5,896
Net income | 437,175 |  |  | 437,175 |  |  |
Purchase of treasury stock | (427,526) |  |  |  | (427,526) |  |
Exercise of stock options and stock based compensation issuances | 8,848 |  | (19,998) |  | 28,846 |  |
Employee stock purchase plan issuances | 880 |  | 92 |  | 788 |  |
Stock-based compensation | 21,879 |  | 21,879 |  |  |  |
Dividends declared | (45,761) |  |  | (45,761) |  |  |
Other comprehensive income | 512 |  |  |  |  | 512 |
Net Income (Loss) Attributable to Noncontrolling Interest | (3) |  |  |  |  |  | (3)
Capital contributions | 2,823 |  |  |  |  |  | 2,823
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jul. 31, 2018 | 4,537,380 | 1,779 | 722,461 | 4,866,980 | (1,060,746) | (1,810) | 8,716
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Apr. 30, 2018 | 4,486,596 | 1,779 | 715,949 | 4,690,272 | (925,317) | (1,980) | 5,893
Net income | 193,258 |  |  | 193,258 |  |  |
Purchase of treasury stock | (136,048) |  |  |  | (136,048) |  |
Exercise of stock options and stock based compensation issuances | 311 |  | (14) |  | 325 |  |
Employee stock purchase plan issuances | 288 |  | (6) |  | 294 |  |
Stock-based compensation | 6,532 |  | 6,532 |  |  |  |
Dividends declared | (16,550) |  |  | (16,550) |  |  |
Other comprehensive income | 170 |  |  |  |  | 170 |
Capital contributions | 2,823 |  |  |  |  |  | 2,823
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jul. 31, 2018 | 4,537,380 | 1,779 | 722,461 | 4,866,980 | (1,060,746) | (1,810) | 8,716
Cumulative effect adjustment upon adoption of new accounting pronouncements | 1,463 |  | 373 | 1,502 |  | (412) |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2018 | 4,768,912 | 1,779 | 727,053 | 5,161,551 | (1,130,878) | 694 | 8,713
Net income | 387,692 |  |  | 387,692 |  |  |
Purchase of treasury stock | (167,474) |  |  |  | (167,474) |  |
Exercise of stock options and stock based compensation issuances | 4,461 |  | (21,951) |  | 26,412 |  |
Employee stock purchase plan issuances | 976 |  | (42) |  | 1,018 |  |
Stock-based compensation | 19,351 |  | 19,351 |  |  |  |
Dividends declared | (48,301) |  |  | (48,301) |  |  |
Other comprehensive income | 168 |  |  |  |  | 168 |
Net Income (Loss) Attributable to Noncontrolling Interest | (5) |  |  |  |  |  | (5)
Capital contributions | 36,664 |  |  |  |  |  | 36,664
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jul. 31, 2019 | 4,984,457 | 1,779 | 724,411 | 5,482,955 | (1,270,922) | 862 | 45,372
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Apr. 30, 2019 | 4,986,240 | 1,779 | 721,311 | 5,352,424 | (1,135,166) | 806 | 45,086
Net income | 146,318 |  |  | 146,318 |  |  |
Purchase of treasury stock | (142,230) |  |  |  | (142,230) |  |
Exercise of stock options and stock based compensation issuances | 3,883 |  | (2,284) |  | 6,167 |  |
Employee stock purchase plan issuances | 256 |  | (51) |  | 307 |  |
Stock-based compensation | 5,435 |  | 5,435 |  |  |  |
Dividends declared | (15,787) |  |  | (15,787) |  |  |
Other comprehensive income | 56 |  |  |  |  | 56 |
Net Income (Loss) Attributable to Noncontrolling Interest | (1) |  |  |  |  |  | (1)
Capital contributions | 287 |  |  |  |  |  | 287
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jul. 31, 2019 | 4,984,457 | 1,779 | 724,411 | 5,482,955 | (1,270,922) | 862 | 45,372
Cumulative effect adjustment upon adoption of new accounting pronouncements | $ (17,987) |  |  | $ (17,987) |  |  |

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