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Acquisitions - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands | Apr. 30, 2018 | Apr. 30, 2017 | Apr. 30, 2016
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 191,287 | $ 169,017 | $ 76,357
Gemini Technologies, Incorporated and Bubba Blade Branded Products from Fish Tales, LLC |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable | 670 |  |
Inventories | 4,700 |  |
Other current assets | 94 |  |
Property, plant, and equipment | 519 |  |
Intangibles | 6,400 |  |
Goodwill | 12,021 |  |
Total assets acquired | 24,404 |  |
Accounts payable | 1,236 |  |
Accrued payroll | 48 |  |
Total liabilities assumed | 1,284 |  |
Net assets acquired | 23,120 |  |
Gemini Technologies, Incorporated and Bubba Blade Branded Products from Fish Tales, LLC | As Initially Reported |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable | 846 |  |
Inventories | 4,683 |  |
Other current assets | 145 |  |
Property, plant, and equipment | 506 |  |
Intangibles | 6,400 |  |
Goodwill | 11,846 |  |
Total assets acquired | 24,426 |  |
Accounts payable | 1,261 |  |
Accrued payroll | 49 |  |
Other long term liabilities | 100 |  |
Total liabilities assumed | 1,410 |  |
Net assets acquired | 23,016 |  |
Gemini Technologies, Incorporated and Bubba Blade Branded Products from Fish Tales, LLC | Measurement Period Adjustments |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable | (176) |  |
Inventories | 17 |  |
Other current assets | (51) |  |
Property, plant, and equipment | 13 |  |
Goodwill | 175 |  |
Total assets acquired | (22) |  |
Accounts payable | (25) |  |
Accrued payroll | (1) |  |
Other long term liabilities | (100) |  |
Total liabilities assumed | (126) |  |
Net assets acquired | $ 104 |  |
Taylor Brands, LLC, Crimson Trace Corporation and Ultimate Survival Technologies, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable |  | 11,422 |
Inventories |  | 31,722 |
Income tax receivable |  | 68 |
Other current assets |  | 298 |
Property, plant, and equipment |  | 8,232 |
Intangibles |  | 83,350 |
Goodwill |  | 102,910 |
Total assets acquired |  | 238,002 |
Accounts payable |  | 6,232 |
Accrued expenses |  | 1,131 |
Accrued payroll |  | 1,428 |
Accrued warranty |  | 194 |
Deferred income taxes |  | 16,249 |
Total liabilities assumed |  | 25,234 |
Net assets acquired |  | 212,768 |
Taylor Brands, LLC, Crimson Trace Corporation and Ultimate Survival Technologies, Inc. | As Initially Reported |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable |  | 11,635 |
Inventories |  | 31,269 |
Other current assets |  | 430 |
Property, plant, and equipment |  | 8,232 |
Intangibles |  | 97,850 |
Goodwill |  | 92,801 |
Total assets acquired |  | 242,217 |
Accounts payable |  | 6,214 |
Accrued expenses |  | 973 |
Accrued payroll |  | 1,500 |
Accrued income taxes |  | 6 |
Accrued warranty |  | 98 |
Deferred income taxes |  | 20,658 |
Total liabilities assumed |  | 29,449 |
Net assets acquired |  | 212,768 |
Taylor Brands, LLC, Crimson Trace Corporation and Ultimate Survival Technologies, Inc. | Measurement Period Adjustments |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable |  | (213) |
Inventories |  | 453 |
Income tax receivable |  | 68 |
Other current assets |  | (132) |
Intangibles |  | (14,500) |
Goodwill |  | 10,109 |
Total assets acquired |  | (4,215) |
Accounts payable |  | 18 |
Accrued expenses |  | 158 |
Accrued payroll |  | (72) |
Accrued income taxes |  | (6) |
Accrued warranty |  | 96 |
Deferred income taxes |  | (4,409) |
Total liabilities assumed |  | $ (4,215) |

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