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ACQUISITIONS (Details) £ in Thousands, $ in Thousands, $ in Thousands |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
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Jun. 04, 2018 USD ($) | Feb. 13, 2018 GBP (£) | Feb. 13, 2018 USD ($) | Nov. 06, 2017 USD ($) | Oct. 02, 2017 USD ($) | Sep. 29, 2017 AUD ($) | Sep. 29, 2017 USD ($) | Jul. 31, 2017 GBP (£) | Jul. 31, 2017 USD ($) | Dec. 30, 2016 AUD ($) | Dec. 30, 2016 USD ($) | Oct. 31, 2018 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Jul. 31, 2017 USD ($) | May 18, 2016 | Feb. 27, 2014
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition contingent consideration |  |  |  |  |  |  |  |  |  |  |  |  | $ (1,333) |  |  |  | $ 1,646 | $ 0 | $ 0 |  |  |
Acquisition related costs |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,320 | $ 378 | $ 2,348 | $ 0 |  |  |  |  |
Effective tax provision (benefit) rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36.80% | 1.60% | (6.50%) |  |  |
Cornell Cookson [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 66,654 |  |  |  |
Harper Brush Works [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred |  |  |  | $ 4,383 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  | 2,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  | 3,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  |  | $ 900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ClosetMaid LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred |  |  |  |  | $ 185,700 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Definite-lived intangibles |  |  |  |  | 26,840 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  | 74,580 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  | 32,234 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  |  |  | $ 47,464 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges adjustments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 900 |  |  |
Effective tax provision (benefit) rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 39.70% |  |  |
Tuscan Landscape Group Pty LTS [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | $ 3,900 |  |  |  | $ 6,400 |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  | 7,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tuscan Landscape Group Pty LTS [Member] | AMES Australia [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred |  |  |  |  |  | $ 22,250 | $ 18,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
La Hacienda Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets | £ |  |  |  |  |  |  |  | £ 3,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable | £ |  |  |  |  |  |  |  | 4,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |
La Hacienda Limited [Member] | The AMES Companies, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred |  |  |  |  |  |  |  | 9,175 | $ 11,400 |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration |  |  |  |  |  |  |  | £ 790 |  |  |  |  |  |  |  |  |  |  |  | $ 600 |  |
Hills Home Living [Member] | AMES Australia [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred |  |  |  |  |  |  |  |  |  | $ 8,400 | $ 6,051 |  |  |  |  |  |  |  |  |  |  |
Cornell Cookson [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred | $ 180,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Definite-lived intangibles | 14,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets | 67,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable | 30,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment | 49,426 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Working capital adjustment | $ 12,426 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses |  |  |  |  |  |  |  |  |  |  |  | $ 9,219 |  |  |  |  |  |  |  |  |  |
Kelkay [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred |  | £ 40,452 | $ 56,118 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration |  |  | 7,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition contingent consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,300 |  |  |  |  |
Land acquired |  |  | 8,241 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable and inventory |  |  | 8,894 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Selling, general and administrative expenses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition related costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,097 | $ 9,617 |  |  |
Cost of Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition related costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500 |  |  |  |
Senior Notes Two Thousand Twenty Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated percentage |  |  |  |  | 5.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.25% | 5.25%
Senior Notes Two Thousand Twenty Two [Member] | ClosetMaid LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.25%
Senior note due 2022 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  |  |  | $ 275,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.25%
Senior note due 2022 [Member] | Senior notes [Member] | ClosetMaid LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  |  |  | $ 275,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade Names [Member] | Kelkay [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Definite-lived intangibles |  |  | 19,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships [Member] | Kelkay [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ACQUISITIONS (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Definite-lived intangibles |  |  | $ 6,640 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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