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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME - UNAUDITED - USD ($) $ in Thousands | Total | Redeemable Noncontrolling Interests [Member] | Common Stock [Member] | Common Stock [Member] Class A Common Stock [Member] | Capital In Excess Of Par Value [Member] | Deferred Compensation Obligation [Member] | HEICO Stock Held By Irrevocable Trust [Member] | AOCI Attributable to Parent [Member] | Retained Earnings [Member] | Noncontrolling Interest [Member] | Total Shareholders Equity [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Starting Balance at Oct. 31, 2015 |  |  | $ 269 | $ 400 | $ 286,220 | $ 1,783 | $ (1,783) | $ (25,080) | $ 548,054 | $ 83,408 | $ 893,271
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Parent | $ 114,638 |  |  |  |  |  |  | 2,708 | 111,930 |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest | 14,900 | $ 7,431 |  |  |  |  |  |  |  | 7,469 |
Comprehensive income | 129,538 |  |  |  |  |  |  |  |  |  | 122,107
Cash dividends |  |  |  |  |  |  |  |  | (10,724) |  | (10,724)
Issuance of common stock to Savings and Investment Plan |  |  | 1 | 1 | 5,913 |  |  |  |  |  | 5,915
Share-based compensation expense |  |  |  |  | 4,905 |  |  |  |  |  | 4,905
Proceeds from stock option exercises |  |  |  | 2 |  |  |  |  |  |  | 4,831
Proceeds from stock option exercises, Adjustment to Additional Paid in Capital |  |  |  |  | 4,829 |  |  |  |  |  |
Tax benefit from stock option exercises |  |  |  |  | 867 |  |  |  |  |  | 867
Distributions to noncontrolling interests |  | (7,337) |  |  |  |  |  |  |  | (8,819) | (8,819)
Adjustments to redemption amount of redeemable noncontrolling interests |  | 129 |  |  |  |  |  |  | (129) |  | (129)
Deferred compensation obligation |  |  |  |  |  | (148) |  |  |  |  |
Stock Issued During Period Value Deferred Compensation Obligation |  |  |  |  |  |  | 148 |  |  |  |
Other |  |  |  |  |  |  |  |  |  | 50 | 46
Adjustments to Additional Paid in Capital, Other |  |  |  |  | (4) |  |  |  |  |  |
Ending Balance at Jul. 31, 2016 |  |  | 270 | 403 | 302,730 | 1,635 | (1,635) | (22,372) | 649,131 | 82,108 | 1,012,270
Starting Balance, Redeemable Noncontrolling Interests at Oct. 31, 2015 |  | 91,282 |  |  |  |  |  |  |  |  |
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest | 14,900 | 7,431 |  |  |  |  |  |  |  | 7,469 |
Distributions to noncontrolling interests |  | (7,337) |  |  |  |  |  |  |  | (8,819) | (8,819)
Acquisition of noncontrolling interests |  | (3,599) |  |  |  |  |  |  |  |  |
Adjustments to redemption amount of redeemable noncontrolling interests |  | 129 |  |  |  |  |  |  | (129) |  | (129)
Ending Balance, Redeemable Noncontrolling Interests at Jul. 31, 2016 |  | 87,906 |  |  |  |  |  |  |  |  |
Starting Balance at Oct. 31, 2016 | 1,047,705 |  | 270 | 403 | 306,328 | 2,460 | (2,460) | (25,326) | 681,704 | 84,326 | 1,047,705
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Parent | 149,070 |  |  |  |  |  |  | 16,759 | 132,311 |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest | 17,379 | 9,127 |  |  |  |  |  |  |  | 8,252 |
Comprehensive income | 166,449 |  |  |  |  |  |  |  |  |  | 157,322
Cash dividends |  |  |  |  |  |  |  |  | (12,807) |  | (12,807)
Stock Issued During Period, Value, Stock Dividend |  |  | 68 | 101 |  |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Stock Split |  |  |  |  | (169) |  |  |  |  |  |
Dividends, Common Stock, Stock |  |  |  |  |  |  |  |  | (23) |  | (23)
Issuance of common stock to Savings and Investment Plan |  |  |  |  | 6,489 |  |  |  |  |  | 6,489
Share-based compensation expense |  |  |  |  | 5,207 |  |  |  |  |  | 5,207
Proceeds from stock option exercises |  |  |  | 2 |  |  |  |  |  |  | 4,171
Proceeds from stock option exercises, Adjustment to Additional Paid in Capital |  |  |  |  | 4,169 |  |  |  |  |  |
Distributions to noncontrolling interests |  | (5,093) |  |  |  |  |  |  |  | (7,831) | (7,831)
Adjustments to redemption amount of redeemable noncontrolling interests |  | 3,565 |  |  |  |  |  |  | (3,565) |  | (3,565)
Deferred compensation obligation |  |  |  |  |  | (140) |  |  |  |  |
Stock Issued During Period Value Deferred Compensation Obligation |  |  |  |  |  |  | 140 |  |  |  |
Other |  |  |  |  |  |  |  |  | (1) |  | (1)
Ending Balance at Jul. 31, 2017 | 1,196,669 |  | $ 338 | $ 506 | $ 322,024 | $ 2,320 | $ (2,320) | $ (8,567) | 797,621 | 84,747 | 1,196,669
Starting Balance, Redeemable Noncontrolling Interests at Oct. 31, 2016 | 99,512 | 99,512 |  |  |  |  |  |  |  |  |
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest | 17,379 | 9,127 |  |  |  |  |  |  |  | 8,252 |
Noncontrolling Interest, Increase from Business Combination |  | 23,618 |  |  |  |  |  |  |  |  |
Distributions to noncontrolling interests |  | (5,093) |  |  |  |  |  |  |  | $ (7,831) | (7,831)
Acquisition of noncontrolling interests |  | (3,848) |  |  |  |  |  |  |  |  |
Adjustments to redemption amount of redeemable noncontrolling interests |  | 3,565 |  |  |  |  |  |  | $ (3,565) |  | $ (3,565)
Ending Balance, Redeemable Noncontrolling Interests at Jul. 31, 2017 | $ 126,881 | $ 126,881 |  |  |  |  |  |  |  |  |

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