Griffon (GFF) 10-Q 30 Jul 14 2014 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Jun. 30, 2014
Document and Entity Information [Abstract]	'
Entity Registrant Name	'GRIFFON CORP
Document Type	'10-Q
Current Fiscal Year End Date	'--09-30
Entity Common Stock, Shares Outstanding	53,708,690
Amendment Flag	'false
Entity Central Index Key	'0000050725
Entity Current Reporting Status	'Yes
Entity Voluntary Filers	'No
Entity Filer Category	'Accelerated Filer
Entity Well-known Seasoned Issuer	'No
Document Period End Date	30-Jun-14
Document Fiscal Year Focus	'2014
Document Fiscal Period Focus	'Q3

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2014	Sep. 30, 2013
In Thousands, unless otherwise specified
CURRENT ASSETS	'	'
Cash and equivalents	$87,437	$178,130
Accounts receivable, net of allowances of $7,176 and $6,136	269,669	256,215
Contract costs and recognized income not yet billed, net of progress payments of $16,985 and $6,941	104,877	109,828
Inventories, net	278,462	230,120
Prepaid and other current assets	74,290	48,903
Assets of discontinued operations	1,209	1,214
Total Current Assets	815,944	824,410
PROPERTY, PLANT AND EQUIPMENT, net	365,376	353,593
GOODWILL	381,315	357,730
INTANGIBLE ASSETS, net	235,092	221,391
OTHER ASSETS	30,491	28,580
ASSETS OF DISCONTINUED OPERATIONS	3,032	3,075
Total Assets	1,831,250	1,788,779
CURRENT LIABILITIES	'	'
Notes payable and current portion of long-term debt	11,886	10,768
Accounts payable	181,052	163,610
Accrued liabilities	103,721	106,743
Liabilities of discontinued operations	2,959	3,288
Total Current Liabilities	299,618	284,409
LONG-TERM DEBT, net of debt discount of $10,532 and $13,246	797,180	678,487
OTHER LIABILITIES	162,103	170,675
LIABILITIES OF DISCONTINUED OPERATIONS	4,008	4,744
Total Liabilities	1,262,909	1,138,315
COMMITMENTS AND CONTINGENCIES	'	'
SHAREHOLDERS’ EQUITY	'	'
Total Shareholders’ Equity	568,341	650,464
Total Liabilities and Shareholders’ Equity	$1,831,250	$1,788,779

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)	Jun. 30, 2014	Sep. 30, 2013
In Thousands, unless otherwise specified
Accounts receivable, net allowances	$7,176	$6,136
Contract costs, net of progress payments	16,985	6,941
Debt discount, long term debt	$10,532	$13,246

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (USD $)	Total	COMMON STOCK [Member]	CAPITAL INEXCESS OFPAR VALUE [Member]	RETAINED EARNINGS [Member]	TREASURY SHARES [Member]	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Member]	DEFERRED COMPENSATION [Member]
In Thousands, unless otherwise specified
Balance at Sep. 30, 2013	$650,464	$19,404	$494,412	$434,363	($274,602)	($3,339)	($19,774)
Balance (in Shares) at Sep. 30, 2013	'	77,616	'	'	18,527	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'
Net loss	-8,125	'	'	-8,125	'	'	'
Dividend	-4,841	'	'	-4,841	'	'	'
Tax effect from exercise/vesting of equity awards, net	273	'	273	'	'	'	'
Amortization of deferred compensation	1,586	'	'	'	'	'	1,586
Common stock acquired	-72,518	'	'	'	-72,518	'	'
Common stock acquired (in Shares)	'	'	'	'	6,237	'	'
Stock grants and equity awards, net	516	214	302	'	'	'	'
Stock grants and equity awards, net (in Shares)	'	857	'	'	'	'	'
ESOP purchase of common stock	-10,000	'	'	'	'	'	-10,000
ESOP allocation of common stock	225	'	225	'	'	'	'
Stock-based compensation	8,133	'	8,133	'	'	'	'
Other comprehensive loss, net of tax	2,628	'	'	'	'	2,628	'
Balance at Jun. 30, 2014	$568,341	$19,618	$503,345	$421,397	($347,120)	($711)	($28,188)
Balance (in Shares) at Jun. 30, 2014	'	78,473	'	'	24,764	'	'

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]	'	'	'	'
Revenue	$505,039	$509,826	$1,466,184	$1,422,318
Cost of goods and services	386,732	401,515	1,132,387	1,110,840
Gross profit	118,307	108,311	333,797	311,478
Selling, general and administrative expenses	96,135	86,345	273,437	254,623
Restructuring and other related charges	358	1,604	1,892	12,048
Total operating expenses	96,493	87,949	275,329	266,671
Income from operations	21,814	20,362	58,468	44,807
Other income (expense)	'	'	'	'
Interest expense	-11,661	-13,279	-37,184	-39,446
Interest income	120	142	181	321
Loss from debt extinguishment, net	0	0	-38,890	0
Other, net	2,621	607	4,310	1,515
Total other expense, net	-8,920	-12,530	-71,583	-37,610
Income (loss) before taxes	12,894	7,832	-13,115	7,197
Provision (benefit) for income taxes	-1,570	4,229	-4,990	3,855
Net income (loss)	14,464	3,603	-8,125	3,342
Basic income (loss) per common share (in Dollars per share)	$0.30	$0.07	($0.16)	$0.06
Weighted-average shares outstanding (in Shares)	48,370	54,265	50,038	54,588
Diluted income (loss) per common share (in Dollars per share)	$0.29	$0.06	($0.16)	$0.06
Weighted-average shares outstanding (in Shares)	49,836	56,204	50,038	56,735
Dividends paid per common share (in Dollars per share)	$0.03	$0.03	$0.09	$0.08
Net income (loss)	14,464	3,603	-8,125	3,342
Other comprehensive income (loss), net of taxes:	'	'	'	'
Foreign currency translation adjustments	2,809	-7,884	896	-10,805
Pension and other post retirement plans	317	490	1,732	4,839
Gain (loss) on cash flow hedge	0	-158	0	13
Total other comprehensive income (loss), net of taxes	3,126	-7,552	2,628	-5,953
Comprehensive income (loss), net	$17,590	($3,949)	($5,497)	($2,611)

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net income (loss)	($8,125)	$3,342
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'
Depreciation and amortization	50,027	52,787
Stock-based compensation	8,133	9,327
Asset impairment charges - restructuring	191	3,122
Provision for losses on accounts receivable	420	824
Amortization of deferred financing costs and debt discounts	4,789	4,651
Loss from debt extinguishment, net	38,890	0
Deferred income taxes	-314	-897
(Gain) loss on sale/disposal of assets	78	-788
Change in assets and liabilities, net of assets and liabilities acquired:	'	'
(Increase) decrease in accounts receivable and contract costs and recognized income not yet billed	7,443	-81,381
(Increase) decrease in inventories	-33,195	36,588
(Increase) decrease in prepaid and other assets	-3,439	2,890
Decrease in accounts payable, accrued liabilities and income taxes payable	-15,754	-28,767
Other changes, net	712	856
Net cash provided by operating activities	49,856	2,554
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Acquisition of property, plant and equipment	-54,859	-45,886
Acquired businesses, net of cash acquired	-62,306	0
Proceeds from sale of assets	491	1,326
Investment purchases	-8,402	0
Net cash used in investing activities	-125,076	-44,560
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from issuance of common stock	584	0
Dividends paid	-4,841	-4,384
Purchase of shares for treasury	-72,518	-25,689
Proceeds from long-term debt	682,913	303
Payments of long-term debt	-602,134	-12,842
Change in short-term borrowings	3,138	2,408
Financing costs	-10,928	-759
Purchase of ESOP shares	-10,000	0
Tax benefit from exercise/vesting of equity awards, net	273	150
Other, net	194	261
Net cash used in financing activities	-13,319	-40,552
CASH FLOWS FROM DISCONTINUED OPERATIONS:	'	'
Net cash used in operating activities	-1,018	-486
Net cash used in discontinued operations	-1,018	-486
Effect of exchange rate changes on cash and equivalents	-1,136	-506
NET DECREASE IN CASH AND EQUIVALENTS	-90,693	-83,550
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	178,130	209,654
CASH AND EQUIVALENTS AT END OF PERIOD	$87,437	$126,104

DESCRIPTION_OF_BUSINESS_AND_BA

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	9 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	'
	DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION
	About Griffon Corporation
	Griffon Corporation (the “Company” or “Griffon”) is a diversified management and holding company that conducts business through wholly-owned subsidiaries. Griffon oversees the operations of its subsidiaries, allocates resources among them and manages their capital structures. Griffon provides direction and assistance to its subsidiaries in connection with acquisition and growth opportunities as well as in connection with divestitures. Griffon, to further diversify, also seeks out, evaluates and, when appropriate, will acquire additional businesses that offer potentially attractive returns on capital.
	Griffon currently conducts its operations through three segments:
	•	Home & Building Products (“HBP”) consists of two companies, The Ames Companies, Inc. (“Ames”) and Clopay Building Products Company, Inc. (“CBP”):
	- Ames is a global provider of non-powered landscaping products that make work easier for homeowners and professionals.
	- CBP is a leading manufacturer and marketer of residential, commercial and industrial garage doors to professional installing dealers and major home center retail chains.
	•	Telephonics Corporation (“Telephonics”) designs, develops and manufactures high-technology integrated information, communication and sensor system solutions to military and commercial markets worldwide.
	•	Clopay Plastic Products Company, Inc. (“Plastics”) is an international leader in the development and production of embossed, laminated and printed specialty plastic films used in a variety of hygienic, health-care and industrial applications.
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these financial statements do not include all the information and footnotes required by U.S. GAAP for complete financial statements. As such, they should be read with reference to Griffon’s Annual Report on Form 10-K for the year ended September 30, 2013, which provides a more complete explanation of Griffon’s accounting policies, financial position, operating results, business properties and other matters. In the opinion of management, these financial statements reflect all adjustments considered necessary for a fair statement of interim results. Griffon’s HBP operations are seasonal; for this and other reasons, the financial results of the Company for any interim period are not necessarily indicative of the results for the full year.
	The condensed consolidated balance sheet information at September 30, 2013 was derived from the audited financial statements included in Griffon’s Annual Report on Form 10-K for the year ended September 30, 2013.
	The consolidated financial statements include the accounts of Griffon and all subsidiaries. Intercompany accounts and transactions have been eliminated on consolidation.
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting periods. These estimates may be adjusted due to changes in economic, industry or customer financial conditions, as well as changes in technology or demand. Significant estimates include allowances for doubtful accounts receivable and returns, net realizable value of inventories, restructuring reserves, valuation of goodwill and intangible assets, percentage of completion method of accounting, pension assumptions, useful lives associated with depreciation and amortization of intangible and fixed assets, warranty reserves, sales incentive accruals, stock based compensation assumptions, income taxes and tax valuation reserves, environmental reserves, legal reserves, insurance reserves and the valuation of discontinued assets and liabilities, and the accompanying disclosures. These estimates are based on management’s best knowledge of current events and actions Griffon may undertake in the future. Actual results may ultimately differ from these estimates.
	Certain amounts in the prior year have been reclassified to conform to current year presentation.

FAIR_VALUE_MEASUREMENTS

FAIR VALUE MEASUREMENTS	9 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
FAIR VALUE MEASUREMENTS	'
	FAIR VALUE MEASUREMENTS
	The carrying values of cash and equivalents, accounts receivable, accounts and notes payable and revolving credit debt approximate fair value due to either the short-term nature of such instruments or the fact that the interest rate of the revolving credit debt is based upon current market rates.
	The fair values of Griffon’s senior notes due 2022 and 2017 4% convertible notes approximated $594,000 and $113,400, respectively, on June 30, 2014. Fair values were based upon quoted market prices (level 1 inputs).
	Items Measured at Fair Value on a Recurring Basis
	Insurance contracts with values of $3,594 (level 2 inputs) at June 30, 2014, are measured and recorded at fair value based upon quoted prices in active markets for similar assets. Trading securities with values of $11,160 (level 1 inputs) at June 30, 2014, are measured and recorded at fair value based upon quoted prices in active markets for identical assets.
	At June 30, 2014, Griffon had $4,172 and $1,750 of Australian dollar contracts and Canadian dollar contracts, respectively, at a weighted average rate of $1.06 and $1.07, respectively. The contracts, which protect Australia and Canada operations from currency fluctuations for U.S. dollar based purchases, do not qualify for hedge accounting and a fair value loss of $192 and $125 was recorded in Other assets and to Other income for the outstanding contracts, based on similar contract values (level 2 inputs), for the quarter and nine months ended June 30, 2014, respectively. All contracts expire in 24 to 114 days.

ACQUISITIONS

ACQUISITIONS	9 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
ACQUISITIONS	'
	ACQUISITIONS
	On May 21, 2014, Ames acquired the Australian Garden and Tools business of Illinois Tool Works, Inc. (“Cyclone”) for approximately $40,000, including a $4,000 working capital adjustment. Cyclone, which was integrated with Ames, offers a full range of quality garden and hand tool products sold under various leading brand names including Cyclone®, Nylex® and Trojan®, designed to meet the requirements of both the Do-it-Yourself and professional trade segments. Cyclone is expected to generate approximately $65,000 of annualized revenue. Selling, General and Administrative ("SG&A") expenses in the current quarter included $1,600 of acquisition costs.
	On December 31, 2013, Ames acquired Northcote Pottery (“Northcote”), founded in 1897 and a leading brand in the Australian outdoor planter and decor market, for approximately $22,000. Northcote complements Southern Patio, acquired in 2011, and adds to Ames’ existing lawn and garden operations in Australia. Northcote, which was integrated with Ames, is expected to generate approximately $28,000 of annualized revenue. First quarter 2014 SG&A expenses included $798 of acquisition costs.
	The accounts of the acquired companies, after adjustment to reflect fair market values (level 3 inputs) assigned to assets purchased, have been included in the consolidated financial statements from the date of acquisition; in each instance, acquired inventory was not significant. Griffon is in the process of finalizing the adjustments to the purchase price, if any, for Cyclone and Northcote, primarily related to working capital, and gathering data as of the closing date to complete the purchase price allocation; accordingly, management has used their best estimates in the initial purchase price allocation as of the date of these financial statements.
	The following table summarizes the fair values of the Cyclone and Northcote assets and liabilities as of the date of acquisition:
		Cyclone			Northcote			Total
	Current Assets, net of cash acquired	$	23,936		$	7,921		$	31,857
	PP&E	491			1,376			1,867
	Goodwill	10,072			11,617			21,689
	Amortizable intangible assets	9,844			6,023			15,867
	Indefinite life intangible assets	1,874			1,686			3,560
	Total assets acquired	46,217			28,623			74,840
	Total liabilities assumed	(6,692		)	(6,842		)	(13,534		)
	Net assets acquired	$	39,525		$	21,781		$	61,306
	The amounts assigned to major intangible asset classifications, none of which are tax deductible, for the Cyclone and Northcote acquisitions are as follows:
		Cyclone			Northcote			Total		Amortization
										Period (Years)
	Goodwill	$	10,072		$	11,617		21,689		N/A
	Tradenames	1,874			1,686			3,560		Indefinite
	Customer relationships	9,844			6,023			15,867		25
		$	21,790		$	19,326		41,116

INVENTORIES

INVENTORIES	9 Months Ended
	Jun. 30, 2014
Inventory Disclosure [Abstract]	'
INVENTORIES	'
	INVENTORIES
	Inventories are stated at the lower of cost (first-in, first-out or average) or market.
	The following table details the components of inventory:
		At June 30, 2014		At September 30, 2013
	Raw materials and supplies	$	71,533	$	65,560
	Work in process	69,884		63,930
	Finished goods	137,045		100,630
	Total	$	278,462	$	230,120

PROPERTY_PLANT_AND_EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT	9 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
PROPERTY, PLANT AND EQUIPMENT	'
	PROPERTY, PLANT AND EQUIPMENT
	The following table details the components of property, plant and equipment, net:
		At June 30, 2014			At September 30, 2013
	Land, building and building improvements	$	131,270		$	130,905
	Machinery and equipment	715,805			661,094
	Leasehold improvements	38,792			35,884
		885,867			827,883
	Accumulated depreciation and amortization	(520,491		)	(474,290		)
	Total	$	365,376		$	353,593
	Depreciation and amortization expense for property, plant and equipment was $14,766 and $15,781 for the quarters ended June 30, 2014 and 2013, respectively, and $44,163 and $46,846 for the nine months ended June 30, 2014 and 2013, respectively. Depreciation included in SG&A expenses was $2,507 and $3,128 for the quarters ended June 30, 2014 and 2013, respectively, and $7,743 and $9,402 for the nine months ended June 30, 2014 and 2013, respectively. The remaining components of depreciation, attributable to manufacturing operations, are included in Cost of goods and services.
	No event or indicator of impairment occurred during the quarter ended June 30, 2014, which would require additional impairment testing of property, plant and equipment.

GOODWILL_AND_OTHER_INTANGIBLES

GOODWILL AND OTHER INTANGIBLES	9 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
GOODWILL AND OTHER INTANGIBLES	'
	GOODWILL AND OTHER INTANGIBLES
	The following table provides changes in the carrying value of goodwill by segment during the nine months ended June 30, 2014:
		At September 30, 2013		Goodwill from		Other				At June 30, 2014
				2014 acquisitions		adjustments
						including currency
						translations
	Home & Building Products	$	269,802	$	21,689	$	948			$	292,439
	Telephonics	18,545		—		—				18,545
	Plastics	69,383		—		948				70,331
	Total	$	357,730	$	21,689	$	1,896			$	381,315
	The following table provides the gross carrying value and accumulated amortization for each major class of intangible assets:
		At June 30, 2014						At September 30, 2013
		Gross Carrying Amount		Accumulated		Average		Gross Carrying Amount				Accumulated
				Amortization		Life						Amortization
						(Years)
	Customer relationships	$	183,152	$	34,543	25		$	166,985			$	29,049
	Unpatented technology	6,708		3,290		13		6,804				2,916
	Total amortizable intangible assets	189,860		37,833				173,789				31,965
	Trademarks	83,065		—				79,567				—
	Total intangible assets	$	272,925	$	37,833			$	253,356			$	31,965
	Amortization expense for intangible assets was $2,028 and $1,969 for the quarters ended June 30, 2014 and 2013, respectively, and $5,864 and $5,941 for the nine months ended June 30, 2014 and 2013, respectively.
	No event or indicator of impairment occurred during the quarter ended June 30, 2014, which would require impairment testing of long-lived intangible assets including goodwill.

INCOME_TAXES

INCOME TAXES	9 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
INCOME TAXES	'
	INCOME TAXES
	The Company reported pretax income for the quarter and a pretax loss for the nine months ended June 30, 2014, compared to pretax income for the quarter and nine months ended June 30, 2013. The Company recognized tax benefits of 12.2% and 38.0% for the quarter and nine months ended June 30, 2014, respectively, compared to provisions of 54.0% and 53.6%, respectively, in the comparable prior year periods. The current and prior year tax rates reflect the impact of permanent differences not deductible in determining taxable income, mainly limited deductibility of restricted stock, tax reserves and changes in earnings mix between domestic and non-domestic operations, which are material relative to the level of pretax results and the impact of discrete items reported.
	The quarter and nine months ended June 30, 2014 include $1,860 and $1,540, respectively, of benefits from discrete items resulting primarily from the conclusion of tax audits, the filing of tax returns in various jurisdictions, the release of previously established reserves for uncertain tax positions and the impact of tax law changes enacted in the second quarter of 2014. The comparable prior year periods included $1,495 and $1,859, respectively, of benefits from discrete items, primarily resulting from the release of previously established reserves for uncertain tax positions on conclusion of tax audits, benefits arising on the filing of tax returns in various jurisdictions and the retroactive extension of the federal R&D credit signed into law January 2, 2013.
	Excluding discrete items, the effective tax rates for the quarter and nine months ended June 30, 2014 were a provision of 27.0% and a benefit of 26.3%, respectively, compared to provisions of 73.1% and 79.4% in the comparable prior year periods, respectively.

LONGTERM_DEBT

LONG-TERM DEBT	9 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
LONG-TERM DEBT	'
	LONG-TERM DEBT
			At June 30, 2014																	At September 30, 2013
			Outstanding Balance				Original Issuer Discount				Balance Sheet				Capitalized Fees & Expenses			Coupon Interest Rate (1)		Outstanding Balance				Original Issuer Discount				Balance Sheet				Capitalized Fees & Expenses			Coupon Interest Rate (1)
	Senior notes due 2018	(a)	$	—			$	—			$	—			$	—		n/a		$	550,000			$	—			$	550,000			$	7,328		7.1	%
	Senior notes due 2022	(a)	600,000				—				600,000				9,529			5.25	%	—				—				—				—			n/a
	Revolver due 2019	(a)	25,000				—				25,000				2,122			n/a		—				—				—				2,425			n/a
	Convert. debt due 2017	(b)	100,000				(10,532		)		89,468				1,145			4	%	100,000				(13,246		)		86,754				1,478			4	%
	Real estate mortgages	(c)	16,603				—				16,603				612			n/a		13,212				—				13,212				185			n/a
	ESOP Loans	(d)	29,583				—				29,583				233			n/a		21,098				—				21,098				24			n/a
	Capital lease - real estate	(e)	8,798				—				8,798				188			5	%	9,529				—				9,529				207			5	%
	Non U.S. lines of credit	(f)	7,754				—				7,754				—			n/a		4,606				—				4,606				—			n/a
	Non U.S. term loans	(f)	30,612				—				30,612				189			n/a		3,115				—				3,115				27			n/a
	Other long term debt	(g)	1,248				—				1,248				27			n/a		941				—				941				—			n/a
	Totals		819,598				(10,532		)		809,066				$	14,045				702,501				(13,246		)		689,255				$	11,674
	less: Current portion		(11,886		)		—				(11,886		)							(10,768		)		—				(10,768		)
	Long-term debt		$	807,712			$	(10,532	)		$	797,180								$	691,733			$	(13,246	)		$	678,487
			Three Months Ended June 30, 2014																	Three Months Ended June 30, 2013
			Effective Interest Rate (1)			Cash Interest				Amort. Debt				Amort.			Total Interest Expense			Effective Interest Rate (1)			Cash Interest				Amort. Debt				Amort.			Total Interest Expense
										Discount				Deferred Cost													Discount				Deferred Cost
														& Other Fees																	& Other Fees
	Senior notes due 2018	(a)	n/a			$	—			$	—			$	—		$	—		7.4	%		$	9,797			$	—			$	406		$	10,203
	Senior notes due 2022	(a)	5.5	%		7,875				—				310			8,185			n/a			—				—				—			—
	Revolver due 2019	(a)	n/a			309				—				144			453			n/a			179				—				131			310
	Convert. debt due 2017	(b)	9.1	%		1,000				921				112			2,033			9.1	%		1,000				846				110			1,956
	Real estate mortgages	(c)	3.8	%		124				—				35			159			4.9	%		133				—				22			155
	ESOP Loans	(d)	2.9	%		192				—				25			217			2.8	%		151				—				2			153
	Capital lease - real estate	(e)	5.3	%		112				—				5			117			5.3	%		125				—				6			131
	Non U.S. lines of credit	(f)	n/a			307				—				27			334			n/a			155				—				—			155
	Non U.S. term loans	(f)	n/a			273				—				13			286			n/a			109				—				26			135
	Other long term debt	(g)	n/a			6				—				9			15			n/a			272				—				—			272
	Capitalized interest					(138		)		—				—			(138		)				(191		)		—				—			(191		)
	Totals					$	10,060			$	921			$	680		$	11,661					$	11,730			$	846			$	703		$	13,279
			Nine Months Ended June 30, 2014																	Nine Months Ended June 30, 2013
			Effective Interest Rate (1)			Cash Interest				Amort. Debt Discount				Amort. Deferred Cost & Other Fees			Total Interest Expense			Effective Interest Rate (1)			Cash Interest				Amort. Debt Discount				Amort. Deferred Cost & Other Fees			Total Interest Expense
	Senior notes due 2018	(a)	7.4	%		$	15,930			$	—			$	667		$	16,597		7.4	%		$	29,391			$	—			$	1,217		$	30,608
	Senior notes due 2022	(a)	5.5	%		10,675				—				421			11,096			n/a			—				—				—			—
	Revolver due 2019	(a)	n/a			782				—				422			1,204			n/a			603				—				444			1,047
	Convert. debt due 2017	(b)	9.1	%		3,000				2,713				333			6,046			9.2	%		3,000				2,491				332			5,823
	Real estate mortgages	(c)	4	%		376				—				108			484			4.9	%		407				—				65			472
	ESOP Loans	(d)	3.2	%		524				—				32			556			2.9	%		476				—				6			482
	Capital lease - real estate	(e)	5.4	%		345				—				19			364			5.3	%		381				—				19			400
	Non U.S. lines of credit	(f)	n/a			724				—				27			751			n/a			415				—				—			415
	Non U.S. term loans	(f)	n/a			426				—				17			443			n/a			415				—				77			492
	Other long term debt	(g)	n/a			17				—				30			47			n/a			523				—				—			523
	Capitalized interest					(404		)		—				—			(404		)				(816		)		—				—			(816		)
	Totals					$	32,395			$	2,713			$	2,076		$	37,184					$	34,795			$	2,491			$	2,160		$	39,446
	On February 27, 2014, in an unregistered offering through a private placement under Rule 144A, Griffon issued, at par, $600,000 of 5.25% Senior Notes due 2022 (“Senior Notes”); interest is payable semi-annually on March 1 and September 1, starting September 1, 2014. Proceeds from the Senior Notes were used to redeem $550,000 of 7.125% senior notes due 2018, to pay a tender offer premium of $31,530 and to make interest payments of $16,716, with the balance used to pay a portion of the transaction fees and expenses. The Senior Notes are senior unsecured obligations of Griffon guaranteed by certain domestic subsidiaries, and subject to certain covenants, limitations and restrictions. On June 18, 2014, Griffon exchanged all of the Senior Notes for substantially identical Senior Notes registered under the Securities Act of 1933 via an exchange offer.
	In connection with these transactions, Griffon capitalized $9,950 of underwriting fees and other expenses incurred related to issuance of the Senior Notes, which will amortize over the term of such notes. Griffon recognized a loss on the early extinguishment of debt on the 7.125% senior notes aggregating $38,890, comprised of the $31,530 tender offer premium, the write-off of $6,574 of remaining deferred financing fees and $786 of prepaid interest on defeased notes.
	On February 14, 2014, Griffon amended its $225,000 Revolving Credit Facility (“Credit Agreement”) to extend its maturity date from March 28, 2018 to March 28, 2019, and to revise certain financial maintenance and negative covenants to improve Griffon's financial and operating flexibility. The facility includes a letter of credit sub-facility with a limit of $60,000, a multi-currency sub-facility of $50,000 and a swing line sub-facility with a limit of $30,000. Borrowings under the Credit Agreement may be repaid and re-borrowed at any time, subject to final maturity of the facility or the occurrence of a default or an event of default under the Credit Agreement. Interest is payable on borrowings at either a LIBOR or base rate benchmark rate, in each case without a floor, plus an applicable margin, which adjusts based on financial performance. The current margins are 1.25% for base rate loans and 2.25% for LIBOR loans. The Credit Agreement has certain financial maintenance tests including a maximum total leverage ratio, a maximum senior secured leverage ratio and a minimum interest coverage ratio as well as customary affirmative and negative covenants and events of default. The Credit Agreement also includes certain restrictions, such as limitations on the ability of Griffon to incur indebtedness and liens and to make restricted payments and investments. Borrowings under the Credit Agreement are guaranteed by Griffon’s material domestic subsidiaries and are secured, on a first priority basis, by substantially all assets of the Company and the guarantors and a pledge of not greater than 65% of the equity interest in each of Griffon’s material, first-tier foreign subsidiaries (except that a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the debt under the ESOP credit agreement ranks pari passu with the lien granted on such assets under the Credit Agreement; see footnote (d) below).
	At June 30, 2014, outstanding borrowings and standby letters of credit were $25,000 and $20,365, respectively; $179,635 was available for borrowing at that date.
	(b)	On December 21, 2009, Griffon issued $100,000 principal of 4% convertible subordinated notes due 2017 (the “2017 Notes”). The current conversion rate of the 2017 Notes is 68.6238 shares of Griffon’s common stock per $1,000 principal amount of notes, corresponding to a conversion price of $14.53 per share. When a cash dividend is declared that would result in an adjustment to the conversion ratio of less than 1%, any adjustment to the conversion ratio is deferred until the first to occur of (i) actual conversion; (ii) the 42nd trading day prior to maturity of the notes; and (iii) such time as the cumulative adjustment equals or exceeds 1%. As of June 30, 2014, aggregate dividends since the last conversion price adjustment of $0.03 per share would have resulted in an adjustment to the conversion ratio of approximately .27%. At both June 30, 2014 and 2013, the 2017 Notes had a capital in excess of par component, net of tax, of $15,720.
	(c)	On October 21, 2013, Griffon refinanced two properties’ real estate mortgages to secure loans totaling $17,175. The loans mature in October 2018, are collateralized by the related properties and are guaranteed by Griffon. The loans bear interest at a rate of LIBOR plus 2.75%. At June 30, 2014, $16,603 was outstanding.
	(d)	In December 2013, Griffon’s Employee Stock Ownership Plan (“ESOP”) entered into a credit agreement which refinanced the two existing ESOP loans into one new Term Loan in the amount of $21,098. The agreement also provided a Line Note with $10,000 available to purchase shares of Griffon common stock in the open market through September 29, 2014. As of June 30, 2014, 749,977 shares of Griffon common stock, for a total of $10,000, were purchased with proceeds from the Line Note. In March 2014, the Line Note was combined with the Term Loan to form one new term loan. The loan bears interest at a) LIBOR plus 2.25% or b) the lender’s prime rate, at Griffon’s option. The loan requires quarterly principal payments of $505 through September 30, 2014 and $419 per quarter thereafter, with a balloon payment of approximately $22,400 due at maturity in December 2018. The loan is secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment. As of June 30, 2014, $29,583 was outstanding.
	In July 2014, Griffon's ESOP entered into an amendment to the existing agreement which provides for an additional $10,000 Line Note available to purchase shares in the open market. The new Line Note will bear interest at a) LIBOR plus 2.75% or b) the lender’s prime rate, at Griffon’s option, through its expiration date on June 30, 2015. Upon expiration or at an earlier date, at Griffon’s option, the new Line Note will be combined with the Term Loan and require quarterly principal payments based on the remaining amortization schedule at a weighted average interest rate of the combined loans, with a balloon payment due at the final maturity date of December 31, 2018, based on the new amortization schedule. The new Line Note and the Term Loan are secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment.
	(e)	In October 2006, CBP entered into a capital lease totaling $14,290 for real estate in Troy, Ohio. The lease matures in 2022, bears interest at a fixed rate of 5.0%, is secured by a mortgage on the real estate and is guaranteed by Griffon. At June 30, 2014, $8,798 was outstanding.
	(f)	In November 2010, Clopay Europe GmbH (“Clopay Europe”) entered into a €10,000 revolving credit facility and a €20,000 term loan. The term loan was paid off in December 2013 and the revolver had borrowings of $4,093 at June 30, 2014. The revolving facility matures in November 2014, but is renewable upon mutual agreement with the bank. The revolving credit facility accrues interest at EURIBOR plus 2.20% per annum (2.41% at June 30, 2014). Clopay Europe is required to maintain a certain minimum equity to assets ratio and keep leverage below a certain level, defined as the ratio of total debt to EBITDA.
	Clopay do Brazil maintains lines of credit of approximately $5,700. Interest on borrowings accrues at a rate of Brazilian CDI plus 6.0% (16.80% at June 30, 2014). At June 30, 2014 there was $3,660 borrowed under the lines. Clopay Plastic Products Company, Inc. guarantees the loan and lines.
	In November 2012, Garant G.P. (“Garant”) entered into a CAD $15,000 revolving credit facility.  The facility accrues interest at LIBOR (USD) or the Bankers Acceptance Rate (CDN) plus 1.3% per annum (1.46% LIBOR USD and 2.51% Bankers Acceptance Rate CDN as of June 30, 2014). The revolving facility matures in November 2015. Garant is required to maintain a certain minimum equity.  At June 30, 2014, there were no borrowings under the revolving credit facility with CAD $15,000 available for borrowing.
	In December 2013 and May 2014, Northcote Holdings Pty Ltd entered into two term loans in the outstanding amounts of AUD $12,500 and AUD $20,000, respectively. The AUD $12,500 and AUD $20,000 term loans are unsecured and require quarterly interest payments, with quarterly principal payments of $625 beginning in August 2015 on the AUD $20,000 term loan. Remaining principal is due at maturity in December 2016 and May 2017, respectively. The loans accrue interest at Bank Bill Swap Bid Rate “BBSY” plus 2.8% per annum (5.5% at June 30, 2014 for each loan). As of June 30, 2014, Griffon had an outstanding combined balance of $30,612 on the term loans. Subsidiaries of Northcote Holdings Pty Ltd also maintain two lines of credit of AUD $3,000 and AUD $5,000 which accrue interest at BBSY plus 2.25% per annum (5.00% at June 30, 2014) and 2.50% per annum (5.25% at June 30, 2014), respectively. At June 30, 2014, there were no outstanding borrowings under the lines. Griffon Corporation guarantees the term loans and the AUD $3,000 line of credit; the assets of a subsidiary of Northcote Holdings Pty Ltd secures the AUD $5,000 line of credit.
	(g) Other long-term debt primarily consists of capital leases.
	At June 30, 2014, Griffon and its subsidiaries were in compliance with the terms and covenants of its credit and loan agreements.

SHAREHOLDERS_EQUITY

SHAREHOLDERS' EQUITY	9 Months Ended
	Jun. 30, 2014
Stockholders' Equity Note [Abstract]	'
SHAREHOLDERS' EQUITY	'
	SHAREHOLDERS’ EQUITY
	During 2013, the Company declared and paid quarterly dividends of $0.025 per share, totaling $0.10 per share for the year. During 2014, the Board of Directors approved and paid a quarterly cash dividend of $0.03 per share in each quarter, totaling $0.09 per share for the nine months ended June 30, 2014. Dividends paid on allocated shares in the ESOP were used to pay down the ESOP loan and recorded as a reduction in expense. A dividend payable was established for the holders of restricted shares; such dividends will be released upon vesting of the underlying restricted shares.
	On July 30, 2014, the Board of Directors declared a quarterly cash dividend of $0.03 per share, payable on September 24, 2014 to shareholders of record as of the close of business on August 21, 2014.
	Compensation expense for restricted stock is recognized ratably over the required service period based on the fair value of the grant calculated as the number of shares granted multiplied by the stock price on the date of grant and, for performance shares, the likelihood of achieving the performance criteria. Compensation cost related to stock-based awards with graded vesting is amortized using the straight-line attribution method.
	In February 2011, shareholders approved the Griffon Corporation 2011 Equity Incentive Plan under which awards of performance shares, performance units, stock options, stock appreciation rights, restricted shares, deferred shares and other stock-based awards may be granted. On January 30, 2014, shareholders approved an amendment and restatement of the Incentive Plan (as amended, the “Incentive Plan”), which, among other things, added 1,200,000 shares to the Incentive Plan. Options granted under the Incentive Plan may be either “incentive stock options” or nonqualified stock options, generally expire ten years after the date of grant and are granted at an exercise price of not less than 100% of the fair market value at the date of grant. The maximum number of shares of common stock available for award under the Incentive Plan is 4,200,000 (600,000 of which may be issued as incentive stock options), plus any shares underlying awards outstanding on the effective date of the Incentive Plan under the 2006 Incentive Plan that are subsequently cancelled or forfeited. As of June 30, 2014, 989,895 shares were available for grant.
	All grants outstanding under the Griffon Corporation 2001 Stock Option Plan, 2006 Equity Incentive Plan and Outside Director Stock Award Plan will continue under their terms; no additional awards will be granted under such plans.
	During the first quarter of 2014, Griffon granted 599,328 restricted stock awards with vesting periods up to four years, 554,498 of which are also subject to certain performance conditions, with a total fair value of $7,426, or a weighted average fair value of $12.39 per share. During the second quarter of 2014, Griffon granted 518,490 restricted stock awards with vesting periods up to four years, 461,827 of which are also subject to certain performance conditions, with a total fair value of $7,074, or a weighted average fair value of $13.64 per share.
	In connection with the Northcote acquisition, Griffon entered into certain retention arrangements with Northcote management. Under these arrangements, on January 10, 2014, Griffon issued 44,476 shares of common stock to Northcote management for an aggregate purchase price of $584 or $13.13 per share, and for each share of common stock purchased, Northcote management received one restricted stock unit (included in the detail in the prior paragraph), that vests in three equal installments over 3 years, subject to the attainment of specified performance criteria.
	For the quarters ended June 30, 2014 and 2013, stock based compensation expense totaled $3,137 and $3,029, respectively. For the nine months ended June 30, 2014 and 2013, stock based compensation expenses totaled $8,133 and $9,327, respectively.
	In each of August 2011 and May 2014, Griffon’s Board of Directors authorized the repurchase of up to $50,000 of Griffon’s outstanding common stock for each program. Under both repurchase programs, the Company may purchase shares, depending upon market conditions, in open market or privately negotiated transactions, including pursuant to a 10b5-1 plan. During the quarter ended June 30, 2014, Griffon purchased 750,000 shares of common stock under these programs, for a total of $8,784 or $11.71 per share. In the nine months ended June 30, 2014, Griffon purchased 1,348,481 shares of common stock under these programs, for a total of $16,285 or $12.08 per share. Since the resumption of share repurchases in 2011 through the end of the third quarter of 2014, Griffon has repurchased 6,436,712 shares of common stock, for a total of $65,315 or $10.15 per share, under Board authorized repurchase programs (which repurchases included exhausting the remaining availability under a Board authorized repurchase program that was in existence prior to 2011). As of June 30, 2014, the August 2011 program was completed and $45,742 remains under the May 2014 authorization.
	During the quarter and nine months ended June 30, 2014, 33,046 shares, with a market value of $364 or $11.02 per share, and 444,110 shares, with a market value of $5,631 or $12.68 per share, respectively, were withheld to settle employee taxes due to the vesting of restricted stock and were added to treasury.
	On December 10, 2013, Griffon repurchased 4,444,444 shares of its common stock for $50,000 from GS Direct, L.L.C. (“GS Direct”), an affiliate of The Goldman Sachs Group, Inc. The repurchase was effected in a private transaction at a per share price of $11.25, an approximate 9.2% discount to the stock’s closing price on November 12, 2013, the day before announcement of the transaction. The transaction was exclusive of the Company’s August 2011 $50,000 authorized share repurchase program. After closing the transaction, GS Direct continued to hold approximately 5.56 million shares (approximately 10%) of Griffon’s common stock. GS Direct also agreed that, subject to certain exceptions, if it intends to sell its remaining shares of Griffon common stock at any time prior to December 31, 2014, it will first negotiate in good faith to sell such shares to the Company.
	In December 2013, Griffon’s Board of Directors authorized the ESOP to purchase up to $10,000 of Griffon’s outstanding common stock, depending upon market conditions, in open market or privately negotiated transactions, including pursuant to a 10b5-1 plan. During the first quarter of 2014, the ESOP purchased 120,000 shares of common stock, for a total of $1,591 or $13.26 per share. During the second quarter of 2014, the ESOP purchased 629,977 shares of common stock, for a total of $8,409 or $13.35 per share. In total, during the nine months ended June 30, 2014, the ESOP purchased 749,977 shares of common stock, for a total of $10,000 or $13.33 per share, exhausting the $10,000 authorization. In July 2014, Griffon's ESOP entered into an amendment of the existing Agreement, which provides an additional $10,000 Line Note available to purchase shares in the open market.

EARNINGS_PER_SHARE_EPS

EARNINGS PER SHARE (EPS)	9 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
EARNINGS PER SHARE (EPS)	'
	EARNINGS PER SHARE (EPS)
	Basic EPS (and diluted EPS in periods where a loss exists) was calculated by dividing income available to common shareholders by the weighted average number of shares of common stock outstanding during the period. Diluted EPS was calculated by dividing income available to common shareholders by the weighted average number of shares of common stock outstanding plus additional common shares that could be issued in connection with stock based compensation. The 2017 Notes were anti-dilutive due to the conversion price being greater than the weighted-average stock price during the periods presented.
	The following table is a reconciliation of the share amounts (in thousands) used in computing earnings per share:
		Three Months Ended June 30,		Nine Months Ended June 30,
		2014	2013	2014	2013
	Weighted average shares outstanding - basic	48,370	54,265	50,038	54,588
	Incremental shares from stock based compensation	1,466	1,939	—	2,147
	Weighted average shares outstanding - diluted	49,836	56,204	50,038	56,735
	Anti-dilutive options excluded from diluted EPS computation	643	715	643	715
	Anti-dilutive restricted stock excluded from diluted EPS computation	—	—	1,609	—
	Griffon has the intent and ability to settle the principal amount of the 2017 Notes in cash, and as such, the potential issuance of shares related to the principal amount of the 2017 Notes does not affect diluted shares.

BUSINESS_SEGMENTS

BUSINESS SEGMENTS	9 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
BUSINESS SEGMENTS	'
	BUSINESS SEGMENTS
	Griffon’s reportable business segments are as follows:
	•	HBP is a leading manufacturer and marketer of residential, commercial and industrial garage doors to professional installing dealers and major home center retail chains, as well as a global provider of non-powered landscaping products that make work easier for homeowners and professionals.
	•	Telephonics develops, designs and manufactures high-technology integrated information, communication and sensor system solutions to military and commercial markets worldwide.
	•	Plastics is an international leader in the development and production of embossed, laminated and printed specialty plastic films used in a variety of hygienic, health-care and industrial applications.
	Information on Griffon’s business segments is as follows:
		For the Three Months Ended June 30,						For the Nine Months Ended June 30,
	REVENUE	2014			2013			2014			2013
	Home & Building Products:
	Ames	$	132,179		$	128,332		$	389,492		$	341,878
	CBP	121,814			112,285			334,494			314,651
	Home & Building Products	253,993			240,617			723,986			656,529
	Telephonics	102,446			129,997			302,656			347,678
	Plastics	148,600			139,212			439,542			418,111
	Total consolidated net sales	$	505,039		$	509,826		$	1,466,184		$	1,422,318
	The following table reconciles segment operating profit to Loss before taxes:
		For the Three Months Ended June 30,						For the Nine Months Ended June 30,
	INCOME (LOSS) BEFORE TAXES	2014			2013			2014			2013
	Segment operating profit:
	Home & Building Products	$	9,747		$	11,549		$	27,958		$	22,655
	Telephonics	13,134			10,592			34,463			38,990
	Plastics	8,075			5,401			23,252			8,959
	Total segment operating profit	30,956			27,542			85,673			70,604
	Net interest expense	(11,541		)	(13,137		)	(37,003		)	(39,125		)
	Unallocated amounts	(6,521		)	(6,573		)	(22,895		)	(22,140		)
	Loss from debt extinguishment, net	—			—			(38,890		)	—
	Loss on pension settlement	—			—			—			(2,142		)
	Income (loss) before taxes	$	12,894		$	7,832		$	(13,115	)	$	7,197
	Griffon evaluates performance and allocates resources based on each segment's operating results before interest income and expense, income taxes, depreciation and amortization, unallocated amounts (mainly corporate overhead), restructuring charges, acquisition-related expenses, and gains (losses) from pension settlement and debt extinguishment, as applicable (“Segment adjusted EBITDA”). Griffon believes this information is useful to investors for the same reason.
	The following table provides a reconciliation of Segment adjusted EBITDA to Income (loss) before taxes:
		For the Three Months Ended June 30,						For the Nine Months Ended June 30,
		2014			2013			2014			2013
	Segment adjusted EBITDA:
	Home & Building Products	$	19,596		$	21,478		$	55,787		$	56,272
	Telephonics	15,087			13,146			40,018			45,015
	Plastics	14,922			12,161			43,881			33,832
	Total Segment adjusted EBITDA	49,605			46,785			139,686			135,119
	Net interest expense	(11,541		)	(13,137		)	(37,003		)	(39,125		)
	Segment depreciation and amortization	(16,691		)	(17,639		)	(49,723		)	(52,467		)
	Unallocated amounts	(6,521		)	(6,573		)	(22,895		)	(22,140		)
	Loss from debt extinguishment, net	—			—			(38,890		)	—
	Restructuring charges	(358		)	(1,604		)	(1,892		)	(12,048		)
	Acquisition costs	(1,600		)	—			(2,398		)	—
	Loss on pension settlement	—			—			—			(2,142		)
	Income (loss) before taxes	$	12,894		$	7,832		$	(13,115	)	$	7,197
	Unallocated amounts typically include general corporate expenses not attributable to a reportable segment.
		For the Three Months Ended June 30,						For the Nine Months Ended June 30,
	DEPRECIATION and AMORTIZATION	2014			2013			2014			2013
	Segment:
	Home & Building Products	$	7,891		$	9,075		$	23,539		$	27,092
	Telephonics	1,953			1,804			5,555			5,275
	Plastics	6,847			6,760			20,629			20,100
	Total segment depreciation and amortization	16,691			17,639			49,723			52,467
	Corporate	104			110			304			320
	Total consolidated depreciation and amortization	$	16,795		$	17,749		$	50,027		$	52,787
	CAPITAL EXPENDITURES
	Segment:
	Home & Building Products	$	8,194		$	6,534		$	23,384		$	22,352
	Telephonics	6,082			2,401			14,969			5,853
	Plastics	5,063			5,947			15,213			17,648
	Total segment	19,339			14,882			53,566			45,853
	Corporate	675			9			1,293			33
	Total consolidated capital expenditures	$	20,014		$	14,891		$	54,859		$	45,886
ASSETS	At June 30, 2014			At September 30, 2013
Segment assets:
Home & Building Products	$	1,020,849		$	908,386
Telephonics	299,058			296,919
Plastics	421,892			422,730
Total segment assets	1,741,799			1,628,035
Corporate	85,210			156,455
Total continuing assets	1,827,009			1,784,490
Assets of discontinued operations	4,241			4,289
Consolidated total	$	1,831,250		$	1,788,779

DEFINED_BENEFIT_PENSION_EXPENS

DEFINED BENEFIT PENSION EXPENSE	9 Months Ended
	Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
DEFINED BENEFIT PENSION EXPENSE	'
	DEFINED BENEFIT PENSION EXPENSE
	Defined benefit pension expense was as follows:
		Three Months Ended June 30,						Nine Months Ended June 30,
		2014			2013			2014			2013
	Service cost	$	—		$	51		$	90		$	149
	Interest cost	2,416			2,427			7,415			7,274
	Expected return on plan assets	(2,820		)	(3,139		)	(8,590		)	(9,413		)
	Amortization:
	Prior service cost	4			5			11			15
	Recognized actuarial loss	485			840			1,463			2,520
	Loss on pension settlement	—			—			—			2,142
	Net periodic expense	$	85		$	184		$	389		$	2,687
	During the second quarter of 2014, the company contributed €1,300 (U.S. $1,776), which equaled the net balance sheet liability, in settlement of all remaining obligations for a non U.S. Pension liability.  There were no gains or losses recorded for this settlement.
	First quarter of 2013 SG&A expenses included a $2,142 pension settlement loss resulting from the lump-sum buyout of certain participant’s balances in the Company’s defined benefit plan. The buyouts, funded by the pension plan, reduced the Company’s net pension liability by $3,472 and increased Accumulated Other Comprehensive Income by $3,649.

RECENT_ACCOUNTING_PRONOUNCEMEN

RECENT ACCOUNTING PRONOUNCEMENTS	9 Months Ended
	Jun. 30, 2014
Accounting Changes and Error Corrections [Abstract]	'
RECENT ACCOUNTING PRONOUNCEMENTS	'
	RECENT ACCOUNTING PRONOUNCEMENTS
	In February 2013, the FASB issued guidance requiring enhanced disclosures for items reclassified out of accumulated other comprehensive income (loss). The guidance does not amend any existing requirements for reporting net income (loss) or other comprehensive income (loss) in the financial statements. This guidance is effective prospectively for annual reporting periods beginning after December 15, 2012, with early adoption permitted. As this new guidance is related to presentation only, the implementation of this guidance in the first quarter of fiscal year 2014 did not have a material effect on the Company’s financial condition or results of operations.
	In April 2014, the FASB issued guidance changing the requirements for reporting discontinued operations where a disposal of a component of an entity or group of components of an entity is required to be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity's operations and financial results when either classified as held for sale, or disposed of by sale or otherwise disposed. The amendment also requires enhanced disclosures about the discontinued operation and disclosure information for other significant dispositions. This guidance is effective prospectively for annual reporting periods beginning after December 15, 2014, with early adoption permitted for disposals that have not been previously reported. The implementation of this guidance is not expected to have a material effect on the Company’s financial condition or results of operations.
	In May 2014, the FASB issued guidance on revenue from contracts with customers. The underlying principle is that an entity will recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods or services. The guidance provides a five-step analysis of transactions to determine when and how revenue is recognized. Other major provisions include capitalization of certain contract costs, consideration of time value of money in the transaction price, and allowing estimates of variable consideration to be recognized before contingencies are resolved, in certain circumstances. The guidance also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from an entity's contracts with customers. This guidance permits the use of either the retrospective or cumulative effect transition method and is effective for annual reporting periods beginning after December 15, 2016; early adoption is not permitted. We have not yet selected a transition method and are currently evaluating the impact of the guidance on the Company's financial condition, results of operations and related disclosures.
	The Company has implemented all new accounting pronouncements that are in effect and that may impact its financial statements and does not believe that there are any other new accounting pronouncements that have been issued that might have a material impact on its financial position or results of operations.

DISCONTINUED_OPERATIONS

DISCONTINUED OPERATIONS	9 Months Ended
	Jun. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
DISCONTINUED OPERATIONS	'
	DISCONTINUED OPERATIONS
	The following amounts related to the Installation Services segment, discontinued in 2008, and other businesses discontinued several years ago, which have been segregated from Griffon’s continuing operations, and are reported as assets and liabilities of discontinued operations in the condensed consolidated balance sheets:
		At June 30, 2014		At September 30, 2013
	Assets of discontinued operations:
	Prepaid and other current assets	$	1,209	$	1,214
	Other long-term assets	3,032		3,075
	Total assets of discontinued operations	$	4,241	$	4,289
	Liabilities of discontinued operations:
	Accrued liabilities, current	$	2,959	$	3,288
	Other long-term liabilities	4,008		4,744
	Total liabilities of discontinued operations	$	6,967	$	8,032
	There was no Installation Services revenue or income for the quarter or nine months ended June 30, 2014 or 2013.

RESTRUCTURING_AND_OTHER_RELATE

RESTRUCTURING AND OTHER RELATED CHARGES	9 Months Ended
	Jun. 30, 2014
Restructuring and Related Activities [Abstract]	'
RESTRUCTURING AND OTHER RELATED CHARGES	'
	RESTRUCTURING AND OTHER RELATED CHARGES
	In January 2013, Ames announced its intention to close certain manufacturing facilities, and to consolidate affected operations primarily into its Camp Hill and Carlisle, PA locations. The intended actions, to be completed by the end of calendar 2014, will improve manufacturing and distribution efficiencies, allow for in-sourcing of certain production currently performed by third party suppliers, and improve material flow and absorption of fixed costs.
	Ames anticipates incurring pre-tax restructuring and related exit costs approximating $8,000, comprised of cash charges of $4,000 and non-cash, asset-related charges of $4,000; the cash charges will include $2,500 for one-time termination benefits and other personnel-related costs and $1,500 for facility exit costs. Ames expects $20,000 in capital expenditures in connection with this initiative and, to date, has incurred $7,941 and $15,712 in restructuring costs and capital expenditures, respectively.
	HBP recognized $358 and $1,892, respectively, for the three and nine months ended June 30, 2014, and $854 and $6,525, respectively, for the three and nine months ended June 30, 2013 in restructuring and other related exit costs; such charges primarily related to one-time termination benefits, facility and other personnel costs, and asset impairment charges related to the Ames plant consolidation initiatives. The 2013 period also included charges related to a CBP plant consolidation.
	In February 2013, Plastics undertook a restructuring project, primarily in Europe, to exit low margin business and to eliminate approximately 80 positions, resulting in restructuring charges of $4,773, primarily related to one-time termination benefits and other personnel costs. The project was completed in 2013.
	A summary of the restructuring and other related charges included in the line item “Restructuring and other related charges” in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) were recognized as follows:
		Workforce			Facilities &			Other			Non-cash			Total
		Reduction			Exit Costs			Related			Facility and
								Costs			Other
	Amounts incurred in:
	Quarter ended December 31, 2012	$	994		$	39		$	75		$	—		$	1,108
	Quarter ended March 31, 2013	3,635			683			1,517			3,501			9,336
	Quarter ended June 30, 2013	$	641		$	926		$	37		$	—		$	1,604
	Nine Months Ended June 30, 2013	$	5,270		$	1,648		$	1,629		$	3,501		$	12,048
	Quarter ended December 31, 2013	$	638		$	95		$	109		$	—		$	842
	Quarter ended March 31, 2014	495			137			60			—			692
	Quarter ended June 30, 2014	$	289		$	47		$	22		$	—		$	358
	Nine Months Ended June 30, 2014	$	1,422		$	279		$	191		$	—		$	1,892
	The activity in the restructuring accrual recorded in accrued liabilities consisted of the following:
		Workforce			Facilities &			Other			Total
		Reduction			Exit Costs			Related
	Accrued liability at September 30, 2013	$	3,057		$	393		$	407		$	3,857
	Charges	1,422			279			191			1,892
	Payments	(3,151		)	(599		)	(466		)	(4,216		)
	Accrued liability at June 30, 2014	$	1,328		$	73		$	132		$	1,533

OTHER_EXPENSE

OTHER EXPENSE	9 Months Ended
	Jun. 30, 2014
Other Income and Expenses [Abstract]	'
OTHER EXPENSE	'
	OTHER EXPENSE
	For the quarters ended June 30, 2014 and 2013, Other income (expense) included $365 and $168, respectively, of net currency exchange (losses) in connection with the translation of receivables and payables denominated in currencies other than the functional currencies of Griffon and its subsidiaries as well as $1,437 and $12, respectively, of net investment income.
	For the nine months ended June 30, 2014 and 2013, Other income (expense) included $1,044 and ($299), respectively, of net currency exchange (losses) in connection with the translation of receivables and payables denominated in currencies other than the functional currencies of Griffon and its subsidiaries as well as $1,563 and $365, respectively, of net investment income.

WARRANTY_LIABILITY

WARRANTY LIABILITY	9 Months Ended
	Jun. 30, 2014
Product Warranties Disclosures [Abstract]	'
WARRANTY LIABILITY	'
	WARRANTY LIABILITY
	Telephonics offers warranties against product defects for periods generally ranging from one to two years, depending on the specific product and terms of the customer purchase agreement. Typical warranties require Telephonics to repair or replace the defective products during the warranty period at no cost to the customer. At the time revenue is recognized, Griffon records a liability for warranty costs, estimated based on historical experience, and periodically assesses its warranty obligations and adjusts the liability as necessary. Ames offers an express limited warranty for a period of ninety days on all products from the date of original purchase unless otherwise stated on the product or packaging.
	Changes in Griffon’s warranty liability, included in Accrued liabilities, were as follows:
		Three Months Ended June 30,						Nine Months Ended June 30,
		2014			2013			2014			2013
	Balance, beginning of period	$	7,111		$	7,424		$	6,649		$	8,856
	Warranties issued and changes in estimated pre-existing warranties	576			1,309			2,677			1,965
	Actual warranty costs incurred	(1,199		)	(1,342		)	(2,838		)	(3,430		)
	Balance, end of period	$	6,488		$	7,391		$	6,488		$	7,391

OTHER_COMPREHENSIVE_INCOME_LOS

OTHER COMPREHENSIVE INCOME (LOSS)	9 Months Ended
	Jun. 30, 2014
Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
OTHER COMPREHENSIVE INCOME (LOSS)	'
	OTHER COMPREHENSIVE INCOME (LOSS)
	The amounts recognized in other comprehensive income (loss) were as follows:
		Three Months Ended June 30, 2014									Three Months Ended June 30, 2013
		Pre-tax			Tax			Net of tax			Pre-tax			Tax			Net of tax
	Foreign currency translation adjustments	$	2,809		$	—		$	2,809		$	(7,884	)	$	—		$	(7,884	)
	Pension and other defined benefit plans	491			(174		)	317			823			(333		)	490
	Gain on cash flow hedge	—			—			—			(158		)	—			(158		)
	Total other comprehensive income (loss)	$	3,300		$	(174	)	$	3,126		$	(7,219	)	$	(333	)	$	(7,552	)
		Nine Months Ended June 30, 2014									Nine Months Ended June 30, 2013
		Pre-tax			Tax			Net of tax			Pre-tax			Tax			Net of tax
	Foreign currency translation adjustments	$	896		$	—		$	896		$	(10,805	)	$	—		$	(10,805	)
	Pension and other defined benefit plans	2,682			(950		)	1,732			8,127			(3,288		)	4,839
	Gain on cash flow hedge	—			—			—			13			—			13
	Total other comprehensive income (loss)	$	3,578		$	(950	)	$	2,628		$	(2,665	)	$	(3,288	)	$	(5,953	)
	Amounts reclassified from accumulated other comprehensive income (loss) to income (loss) were as follows:
		Three Months Ended June 30,						Nine Months Ended June 30,
		2014			2013			2014			2013
	Pension amortization	$	489		$	845		$	1,474		$	2,535
	Pension settlement	—			—			—			2,142
	Total before tax	489			845			1,474			4,677
	Tax	(167		)	(296		)	(516		)	(1,341		)
	Net of tax	$	322		$	549		$	958		$	3,336

COMMITMENTS_AND_CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
COMMITMENTS AND CONTINGENCIES	'
	COMMITMENTS AND CONTINGENCIES
	Legal and environmental
	Department of Environmental Conservation of New York State (“DEC”), with ISC Properties, Inc. Lightron Corporation (“Lightron”), a wholly-owned subsidiary of Griffon, once conducted operations at a location in Peekskill in the Town of Cortlandt, New York (the “Peekskill Site”) owned by ISC Properties, Inc. (“ISC”), a wholly-owned subsidiary of Griffon. ISC sold the Peekskill Site in November 1982.
	Subsequently, Griffon was advised by the DEC that random sampling at the Peekskill Site and in a creek near the Peekskill Site indicated concentrations of solvents and other chemicals common to Lightron’s prior plating operations. ISC then entered into a consent order with the DEC in 1996 (the “Consent Order”) to perform a remedial investigation and prepare a feasibility study. After completing the initial remedial investigation pursuant to the Consent Order, ISC was required by the DEC, and did conduct accordingly over the next several years, supplemental remedial investigations, including soil vapor investigations, under the Consent Order.
	In April 2009, the DEC advised ISC’s representatives that both the DEC and the New York State Department of Health had reviewed and accepted an August 2007 Remedial Investigation Report and an Additional Data Collection Summary Report dated January 30, 2009. With the acceptance of these reports, ISC completed the remedial investigation required under the Consent Order and was authorized, accordingly, by the DEC to conduct the Feasibility Study required by the Consent Order.  Pursuant to the requirements of  the Consent Order and its obligations thereunder, ISC, without acknowledging any responsibility to perform any remediation at the Site, submitted to the DEC in August 2009, a draft feasibility study which recommended for the soil, groundwater and sediment medias, remediation alternatives having a current net capital cost value, in the aggregate, of approximately $5,000. In February 2011, the DEC advised ISC it has accepted and approved the feasibility study.  Accordingly, ISC has no further obligations under the consent order.
	Upon acceptance of the feasibility study, the DEC issued a Proposed Remedial Action Plan (“PRAP”) that sets forth the proposed remedy for the site.  The PRAP accepted the recommendation contained in the feasibility study for remediation of the soil and groundwater medias, but selected a different remediation alternative for the sediment medium.  The approximate cost and the current net capital cost value of the remedy proposed by the DEC in the PRAP is approximately $10,000.  After receiving public comments on the PRAP, the DEC issued a Record of Decision (“ROD”) that set forth the specific remedies selected and responded to public comments.  The remedies selected by the DEC in the ROD are the same remedies as those set forth in the PRAP.
	It is now expected that the DEC will enter into negotiations with potentially responsible parties to request they undertake performance of the remedies selected in the ROD, and if such parties do not agree to implement such remedies, then the State may use State Superfund money to remediate the Peekskill site and seek recovery of costs from such parties.  Griffon does not acknowledge any responsibility to perform any remediation at the Peekskill Site.
	Improper Advertisement Claim involving Union Tools Products.  Since December 2004, a customer of Ames has been named in various litigation matters relating to certain Union Tools products. The plaintiffs in those litigation matters have asserted causes of action against the customer of Ames for improper advertisement to end consumers. The allegations suggest that advertisements led the consumers to believe that Union Tools’ hand tools were wholly manufactured within boundaries of the United States. The complaints assert various causes of action against the customer of Ames under federal and state law, including common law fraud. At some point, likely once the litigation against the customer of Ames ends, the customer may seek indemnity (including recovery of its legal fees and costs) against Ames for an unspecified amount. Presently, Ames cannot estimate the amount of loss, if any, if the customer were to seek legal recourse against Ames.
	Department of Environmental Conservation of New York State, regarding Frankfort, NY site. During fiscal 2009, an underground fuel tank with surrounding soil contamination was discovered at the Frankfort, N.Y. site, which is the result of historical facility operations prior to Ames’ ownership. While Ames was actively working with the DEC and the New York State Department of Health to define remediation requirements relative to the underground fuel tank, the DEC took the position that Ames was responsible to remediate other types of contamination on the site. After negotiations with the DEC, on August 15, 2011, Ames executed an Order on Consent with the DEC.  The Order is without admission or finding of liability or acknowledgement that there has been a release of hazardous substances at the site.  Importantly, the Order does not waive any rights that Ames has under a 1991 Consent Judgment entered into between the DEC and a predecessor of Ames relating to the site.  The Order requires that Ames identify Areas of Concern at the site, and formulate a strategy to investigate and remedy both on and off site conditions in compliance with applicable environmental law. At the conclusion of the remedy phase of the remediation to the satisfaction of the DEC, the DEC will issue a Certificate of Completion. On August 1, 2012, a fire occurred during the course of demolition of certain structures at the Frankfort, NY site, requiring cleanup and additional remediation under the oversight of the DEC. Demolition of the structures on the property has been substantially completed.  The DEC has inspected the progress of the work and is satisfied with the results thus far.  On February 12, 2013, the DEC issued comments to the Remedial Investigation Work Plan previously submitted by Ames in October 2011, and in response, Ames issued a Revised Remedial Investigation Work Plan.  Completion of the remedial investigation is dependent on timing of the DEC approval; no additional comments have been provided by the DEC to date. On October 21, 2013 Ames filed its revised Remedial Investigation Report (“RIR”) with the DEC. On February 3, 2014, the DEC accepted Ames’ RIR as a draft and requested certain revisions.  Ames is currently reviewing the requested revisions and will either revise the RIR as requested or negotiate alternate action acceptable to the DEC. On March 31, 2014, the DEC approved Ames Preliminary Schedule for “Additional Remedial Investigation/Feasibility Study Activities” (RI/FS) that identifies remedial investigations and remedial actions through to a Record of Decision. In accordance with the approved RI/FS schedule, Ames filed its work plan for Supplemental Remedial Investigation Activities with the DEC on April 3, 2014. On May 12, 2014 Ames filed a final Soil Vapor Intrusion Work Plan with DEC, which has been approved by DEC. On June 2, 2014 Ames submitted a Draft IRM Construction Completion Report to DEC. To date, DEC has not responded with approvals or comments to the Draft IRM Construction Report.
	U.S. Government investigations and claims
	Defense contracts and subcontracts, including Griffon’s contracts and subcontracts, are subject to audit and review by various agencies and instrumentalities of the United States government, including among others, the Defense Contract Audit Agency (“DCAA”), the Defense Criminal Investigative Service (“DCIS”), and the Department of Justice (“DOJ”) which has responsibility for asserting claims on behalf of the U.S. government.  In addition to ongoing audits, pursuant to subpoenas Griffon is currently providing information to the U.S. Department of Defense Office of the Inspector General and the DOJ.  No claim has been asserted against Griffon, and Griffon is unaware of any material financial exposure in connection with the inquiry.
	In general, departments and agencies of the U.S. Government have the authority to investigate various transactions and operations of Griffon, and the results of such investigations may lead to administrative, civil or criminal proceedings, the ultimate outcome of which could be fines, penalties, repayments or compensatory or treble damages.  U.S. Government regulations provide that certain findings against a contractor may lead to suspension or debarment from future U.S. Government contracts or the loss of export privileges for a company or an operating division or subdivision.  Suspension or debarment could have material adverse effect on Telephonics because of its reliance on government contracts.
	General legal
	Griffon is subject to various laws and regulations relating to the protection of the environment and is a party to legal proceedings arising in the ordinary course of business. Management believes, based on facts presently known to it, that the resolution of the matters above and such other matters will not have a material adverse effect on Griffon’s consolidated financial position, results of operations or cash flows.

RELATED_PARTY

RELATED PARTY	9 Months Ended
	Jun. 30, 2014
Related Party Transactions [Abstract]	'
RELATED PARTY	'
	RELATED PARTY
	Goldman, Sachs & Co. acted as a co-manager and as an initial purchaser in connection with the Senior Notes offering and received a fee of $825.

CONSOLIDATING_GUARANTOR_AND_NO

CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION	9 Months Ended
	Jun. 30, 2014
Consolidating Guarantor And Non Guarantor Financial Information [Abstract]	'
CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION	'
	CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION
	Griffon’s Senior Notes are fully and unconditionally guaranteed, jointly and severally, on a senior secured basis by the domestic assets of Clopay Building Products Company, Inc., Clopay Plastic Products Company, Inc., Telephonics Corporation, The Ames Companies, Inc., ATT Southern, Inc. and Clopay Ames True Temper Holding Corp, each of which are 100%, indirectly, owned by Griffon. In accordance with Rule 3-10 of Regulation S-X promulgated under the Securities Act of 1933, presented below are condensed consolidating financial information as of June 30, 2014 and September 30, 2013 and for the quarter and nine months ended June 30, 2014 and 2013. The financial information may not necessarily be indicative of results of operations or financial position had the guarantor companies or non-guarantor companies operated as independent entities. The guarantor companies and the non-guarantor companies include the consolidated financial results of their wholly-owned subsidiaries accounted for under the equity method.
	The indenture relating to the Senior Notes (the “Indenture”) contains terms providing that, under certain limited circumstances, a guarantor will be released from its obligations to guarantee the Senior Notes.  These circumstances include (i) a sale of at least a majority of the stock, or all or substantially all the assets, of the subsidiary guarantor as permitted by the Indenture; (ii) a public equity offering of a subsidiary guarantor that qualifies as a “Minority Business” as defined in the Indenture (generally, a business the EBITDA of which constitutes less than 50% of the segment adjusted EBITDA of the Company for the most recently ended four fiscal quarters), and that meets certain other specified conditions as set forth in the Indenture; (iii) the designation of a guarantor as an “unrestricted subsidiary” as defined in the Indenture, in compliance with the terms of the Indenture; (iv) Griffon exercising its right to defease the Senior Notes, or to otherwise discharge its obligations under the Indenture, in each case in accordance with the terms of the Indenture; and (v) upon obtaining the requisite consent of the holders of the Senior Notes.
	CONDENSED CONSOLIDATING BALANCE SHEETS
	At June 30, 2014
		Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
	CURRENT ASSETS
	Cash and equivalents	$	9,208		$	19,500		$	58,729		$	—		$	87,437
	Accounts receivable, net of allowances	—			222,754			78,918			(32,003		)	269,669
	Contract costs and recognized income not yet billed, net of progress payments	—			104,518			359			—			104,877
	Inventories, net	—			200,772			77,550			140			278,462
	Prepaid and other current assets	21,180			23,835			18,714			10,561			74,290
	Assets of discontinued operations	—			—			1,209			—			1,209
	Total Current Assets	30,388			571,379			235,479			(21,302		)	815,944
	PROPERTY, PLANT AND EQUIPMENT, net	1,392			261,632			102,352			—			365,376
	GOODWILL	—			288,147			93,168			—			381,315
	INTANGIBLE ASSETS, net	—			157,861			77,231			—			235,092
	INTERCOMPANY RECEIVABLE	547,665			877,793			122,932			(1,548,390		)	—
	EQUITY INVESTMENTS IN SUBSIDIARIES	802,548			682,810			1,916,521			(3,401,879		)	—
	OTHER ASSETS	46,687			51,205			7,812			(75,213		)	30,491
	ASSETS OF DISCONTINUED OPERATIONS	—			—			3,032			—			3,032
	Total Assets	$	1,428,680		$	2,890,827		$	2,558,527		$	(5,046,784	)	$	1,831,250
	CURRENT LIABILITIES
	Notes payable and current portion of long-term debt	$	1,762		$	1,129		$	8,995		$	—		$	11,886
	Accounts payable and accrued liabilities	33,353			187,496			84,571			(20,647		)	284,773
	Liabilities of discontinued operations	—			—			2,959			—			2,959
	Total Current Liabilities	35,115			188,625			96,525			(20,647		)	299,618
	LONG-TERM DEBT, net of debt discounts	742,289			8,096			46,795			—			797,180
	INTERCOMPANY PAYABLES	21,450			746,378			733,551			(1,501,379		)	—
	OTHER LIABILITIES	61,485			149,029			25,921			(74,332		)	162,103
	LIABILITIES OF DISCONTINUED OPERATIONS	—			—			4,008			—			4,008
	Total Liabilities	860,339			1,092,128			906,800			(1,596,358		)	1,262,909
	SHAREHOLDERS’ EQUITY	568,341			1,798,699			1,651,727			(3,450,426		)	568,341
	Total Liabilities and Shareholders’ Equity	$	1,428,680		$	2,890,827		$	2,558,527		$	(5,046,784	)	$	1,831,250
	CONDENSED CONSOLIDATING BALANCE SHEETS
	At September 30, 2013
		Parent			Guarantor			Non-Guarantor			Elimination			Consolidation
		Company			Companies			Companies
	CURRENT ASSETS
	Cash and equivalents	$	68,994		$	25,343		$	83,793		$	—		$	178,130
	Accounts receivable, net of allowances	—			213,506			76,241			(33,532		)	256,215
	Contract costs and recognized income not yet billed, net of progress payments	—			109,683			145			—			109,828
	Inventories, net	—			173,406			56,723			(9		)	230,120
	Prepaid and other current assets	(712		)	21,854			17,330			10,431			48,903
	Assets of discontinued operations	—			—			1,214			—			1,214
	Total Current Assets	68,282			543,792			235,446			(23,110		)	824,410
	PROPERTY, PLANT AND EQUIPMENT, net	972			248,973			103,648			—			353,593
	GOODWILL	—			288,146			69,584			—			357,730
	INTANGIBLE ASSETS, net	—			160,349			61,042			—			221,391
	INTERCOMPANY RECEIVABLE	547,903			911,632			573,269			(2,032,804		)	—
	EQUITY INVESTMENTS IN SUBSIDIARIES	772,374			533,742			2,718,956			(4,025,072		)	—
	OTHER ASSETS	45,968			50,423			7,423			(75,234		)	28,580
	ASSETS OF DISCONTINUED OPERATIONS	—			—			3,075			—			3,075
	Total Assets	$	1,435,499		$	2,737,057		$	3,772,443		$	(6,156,220	)	$	1,788,779
	CURRENT LIABILITIES
	Notes payable and current portion of long-term debt	$	1,000		$	1,079		$	8,689		$	—		$	10,768
	Accounts payable and accrued liabilities	41,121			183,665			70,427			(24,860		)	270,353
	Liabilities of discontinued operations	—			—			3,288			—			3,288
	Total Current Liabilities	42,121			184,744			82,404			(24,860		)	284,409
	LONG-TERM DEBT, net of debt discounts	656,852			9,006			12,629			—			678,487
	INTERCOMPANY PAYABLES	20,607			796,741			1,188,017			(2,005,365		)	—
	OTHER LIABILITIES	65,455			153,970			25,578			(74,328		)	170,675
	LIABILITIES OF DISCONTINUED OPERATIONS	—			—			4,744			—			4,744
Total Liabilities	785,035			1,144,461			1,313,372			(2,104,553		)	1,138,315
SHAREHOLDERS’ EQUITY	650,464			1,592,596			2,459,071			(4,051,667		)	650,464
Total Liabilities and Shareholders’ Equity	$	1,435,499		$	2,737,057		$	3,772,443		$	(6,156,220	)	$	1,788,779
CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)
For the Three Months Ended June 30, 2014
($ in thousands)	Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
Revenue	$	—		$	392,361		$	126,343		$	(13,665	)	$	505,039
Cost of goods and services	—			295,148			103,938			(12,354		)	386,732
Gross profit	—			97,213			22,405			(1,311		)	118,307
Selling, general and administrative expenses	7,034			71,110			19,617			(1,626		)	96,135
Restructuring and other related charges	—			349			9			—			358
Total operating expenses	7,034			71,459			19,626			(1,626		)	96,493
Income (loss) from operations	(7,034		)	25,754			2,779			315			21,814
Other income (expense)
Interest income (expense), net	(1,750		)	(7,367		)	(2,424		)	—			(11,541		)
Loss from debt extinguishment, net	—			—			—			—			—
Other, net	1,436			2,497			(997		)	(315		)	2,621
Total other income (expense)	(314		)	(4,870		)	(3,421		)	(315		)	(8,920		)
Income (loss) before taxes	(7,348		)	20,884			(642		)	—			12,894
Provision (benefit) for income taxes	(9,322		)	7,322			430			—			(1,570		)
Income (loss) before equity in net income of subsidiaries	1,974			13,562			(1,072		)	—			14,464
Equity in net income (loss) of subsidiaries	12,490			(1,161		)	13,562			(24,891		)	—
Net income (loss)	$	14,464		$	12,401		$	12,490		$	(24,891	)	$	14,464
Net Income (loss)	$	14,464		$	12,401		$	12,490		$	(24,891	)	$	14,464
Other comprehensive income (loss), net of taxes	171			(592		)	3,547			—			3,126
Comprehensive income (loss)	$	14,635		$	11,809		$	16,037		$	(24,891	)	$	17,590
CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)
For the Three Months Ended June 30, 2013
($ in thousands)	Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
Revenue	$	—		$	408,371		$	114,004		$	(12,549	)	$	509,826
Cost of goods and services	—			317,156			95,461			(11,102		)	401,515
Gross profit	—			91,215			18,543			(1,447		)	108,311
Selling, general and administrative expenses	4,141			69,015			14,793			(1,604		)	86,345
Restructuring and other related charges	—			1,565			39			—			1,604
Total operating expenses	4,141			70,580			14,832			(1,604		)	87,949
Income (loss) from operations	(4,141		)	20,635			3,711			157			20,362
Other income (expense)
Interest income (expense), net	(3,559		)	(6,982		)	(2,596		)	—			(13,137		)
Other, net	12			2,462			(1,710		)	(157		)	607
Total other income (expense)	(3,547		)	(4,520		)	(4,306		)	(157		)	(12,530		)
Income (loss) before taxes	(7,688		)	16,115			(595		)	—			7,832
Provision (benefit) for income taxes	(2,913		)	6,745			397			—			4,229
Income (loss) before equity in net income of subsidiaries	(4,775		)	9,370			(992		)	—			3,603
Equity in net income (loss) of subsidiaries	8,378			(969		)	9,370			(16,779		)	—
Net income (loss)	$	3,603		$	8,401		$	8,378		$	(16,779	)	$	3,603
Net Income (loss)	$	3,603		$	8,401		$	8,378		$	(16,779	)	$	3,603
Other comprehensive income (loss), net of taxes	211			836			(8,599		)	—			(7,552		)
Comprehensive income (loss)	$	3,814		$	9,237		$	(221	)	$	(16,779	)	$	(3,949	)
CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)
For the Nine Months Ended June 30, 2014
	Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
Revenue	$	—		$	1,133,510		$	375,877		$	(43,203	)	$	1,466,184
Cost of goods and services	—			860,322			310,887			(38,822		)	1,132,387
Gross profit	—			273,188			64,990			(4,381		)	333,797
Selling, general and administrative expenses	20,525			207,725			50,025			(4,838		)	273,437
Restructuring and other related charges	—			1,841			51			—			1,892
Total operating expenses	20,525			209,566			50,076			(4,838		)	275,329
Income (loss) from operations	(20,525		)	63,622			14,914			457			58,468
Other income (expense)
Interest income (expense), net	(8,240		)	(21,946		)	(6,817		)	—			(37,003		)
Loss from debt extinguishment, net	(38,890		)	—			—			—			(38,890		)
Other, net	1,563			5,569			(2,365		)	(457		)	4,310
Total other income (expense)	(45,567		)	(16,377		)	(9,182		)	(457		)	(71,583		)
Income (loss) before taxes	(66,092		)	47,245			5,732			—			(13,115		)
Provision (benefit) for income taxes	(24,901		)	19,014			897			—			(4,990		)
Income (loss) before equity in net income of subsidiaries	(41,191		)	28,231			4,835			—			(8,125		)
Equity in net income (loss) of subsidiaries	33,066			4,587			28,231			(65,884		)	—
Net income (loss)	$	(8,125	)	$	32,818		$	33,066		$	(65,884	)	$	(8,125	)
Net Income (loss)	$	(8,125	)	$	32,818		$	33,066		$	(65,884	)	$	(8,125	)
Other comprehensive income (loss), net of taxes	511			1,277			840			—			2,628
Comprehensive income (loss)	$	(7,614	)	$	34,095		$	33,906		$	(65,884	)	$	(5,497	)
CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)
For the Nine Months Ended June 30, 2013
	Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
Revenue	$	—		$	1,109,275		$	352,514		$	(39,471	)	$	1,422,318
Cost of goods and services	—			848,342			297,826			(35,328		)	1,110,840
Gross profit	—			260,933			54,688			(4,143		)	311,478
Selling, general and administrative expenses	15,419			198,601			45,327			(4,724		)	254,623
Restructuring and other related charges	—			8,045			4,003			—			12,048
Total operating expenses	15,419			206,646			49,330			(4,724		)	266,671
Income (loss) from operations	(15,419		)	54,287			5,358			581			44,807
Other income (expense)
Interest income (expense), net	(10,781		)	(20,685		)	(7,659		)	—			(39,125		)
Other, net	367			6,227			(4,498		)	(581		)	1,515
Total other income (expense)	(10,414		)	(14,458		)	(12,157		)	(581		)	(37,610		)
Income (loss) before taxes	(25,833		)	39,829			(6,799		)	—			7,197
Provision (benefit) for income taxes	(12,672		)	15,693			834			—			3,855
Income (loss) before equity in net income of subsidiaries	(13,161		)	24,136			(7,633		)	—			3,342
Equity in net income (loss) of subsidiaries	16,503			(7,565		)	24,136			(33,074		)	—
Net income (loss)	$	3,342		$	16,571		$	16,503		$	(33,074	)	$	3,342
Net Income (loss)	$	3,342		$	16,571		$	16,503		$	(33,074	)	$	3,342
Foreign currency translation adjustments	—			330			(11,135		)	—			(10,805		)
Other comprehensive income (loss), net of taxes	633			3,963			256			—			4,852
Comprehensive income (loss)	$	3,975		$	20,864		$	5,624		$	(33,074	)	$	(2,611	)
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
For the Nine Months Ended June 30, 2014
	Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$	(8,125	)	$	32,818		$	33,066		$	(65,884	)	$	(8,125	)
Net cash provided by (used in) operating activities	(10,966		)	(8,300		)	69,122			—			49,856
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(672		)	(45,749		)	(8,438		)	—			(54,859		)
Acquired businesses, net of cash acquired	—			(1,000		)	(61,306		)	—			(62,306		)
Intercompany distributions	10,000			(10,000		)	—			—			—
Investment purchases	(8,402		)	—			—			—			(8,402		)
Proceeds from sale of assets	—			298			193			—			491
Net cash provided by (used in) investing activities	926			(56,451		)	(69,551		)	—			(125,076		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	584			—			—			—			584
Purchase of shares for treasury	(72,518		)	—			—			—			(72,518		)
Proceeds from long-term debt	649,568			(253		)	33,598			—			682,913
Payments of long-term debt	(597,613		)	(708		)	(3,813		)	—			(602,134		)
Change in short-term borrowings	—			—			3,138			—			3,138
Financing costs	(10,393		)	—			(535		)	—			(10,928		)
Purchase of ESOP shares	(10,000		)	—			—			—			(10,000		)
Tax effect from exercise/vesting of equity awards, net	273			—			—			—			273
Dividend	(9,841		)	5,000			—			—			(4,841		)
Other, net	194			54,869			(54,869		)	—			194
Net cash provided by (used in) financing activities	(49,746		)	58,908			(22,481		)	—			(13,319		)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	—			—			(1,018		)	—			(1,018		)
Effect of exchange rate changes on cash and equivalents	—			—			(1,136		)	—			(1,136		)
NET DECREASE IN CASH AND EQUIVALENTS	(59,786		)	(5,843		)	(25,064		)	—			(90,693		)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	68,994			25,343			83,793			—			178,130
CASH AND EQUIVALENTS AT END OF PERIOD	$	9,208		$	19,500		$	58,729		$	—		$	87,437
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
For the Nine Months Ended June 30, 2013
	Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$	3,342		$	16,571		$	16,503		$	(33,074	)	$	3,342
Net cash provided by (used in) operating activities	(67,628		)	23,214			46,968			—			2,554
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(33		)	(40,324		)	(5,529		)	—			(45,886		)
Intercompany distributions	10,000			(10,000		)	—			—			—
Proceeds from sale of assets	—			1,172			154			—			1,326
Net cash provided by (used in) investing activities	9,967			(49,152		)	(5,375		)	—			(44,560		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	(25,689		)	—			—			—			(25,689		)
Proceeds from long-term debt	—			303			—			—			303
Payments of long-term debt	(1,751		)	(772		)	(10,319		)	—			(12,842		)
Change in short-term borrowings	—			—			2,408			—			2,408
Financing costs	(759		)	—			—			—			(759		)
Tax effect from exercise/vesting of equity awards, net	150			—			—			—			150
Dividend	(4,384		)	—			—			—			(4,384		)
Other, net	261			14,661			(14,661		)	—			261
Net cash provided by (used in) financing activities	(32,172		)	14,192			(22,572		)	—			(40,552		)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	—			—			(486		)	—			(486		)
Effect of exchange rate changes on cash and equivalents	—			—			(506		)	—			(506		)
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS	(89,833		)	(11,746		)	18,029			—			(83,550		)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	125,093			34,782			49,779			—			209,654
CASH AND EQUIVALENTS AT END OF PERIOD	$	35,260		$	23,036		$	67,808		$	—		$	126,104

DESCRIPTION_OF_BUSINESS_AND_BA1

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Policies)	9 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these financial statements do not include all the information and footnotes required by U.S. GAAP for complete financial statements. As such, they should be read with reference to Griffon’s Annual Report on Form 10-K for the year ended September 30, 2013, which provides a more complete explanation of Griffon’s accounting policies, financial position, operating results, business properties and other matters. In the opinion of management, these financial statements reflect all adjustments considered necessary for a fair statement of interim results. Griffon’s HBP operations are seasonal; for this and other reasons, the financial results of the Company for any interim period are not necessarily indicative of the results for the full year.
	The condensed consolidated balance sheet information at September 30, 2013 was derived from the audited financial statements included in Griffon’s Annual Report on Form 10-K for the year ended September 30, 2013.
	The consolidated financial statements include the accounts of Griffon and all subsidiaries. Intercompany accounts and transactions have been eliminated on consolidation.
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting periods. These estimates may be adjusted due to changes in economic, industry or customer financial conditions, as well as changes in technology or demand. Significant estimates include allowances for doubtful accounts receivable and returns, net realizable value of inventories, restructuring reserves, valuation of goodwill and intangible assets, percentage of completion method of accounting, pension assumptions, useful lives associated with depreciation and amortization of intangible and fixed assets, warranty reserves, sales incentive accruals, stock based compensation assumptions, income taxes and tax valuation reserves, environmental reserves, legal reserves, insurance reserves and the valuation of discontinued assets and liabilities, and the accompanying disclosures. These estimates are based on management’s best knowledge of current events and actions Griffon may undertake in the future. Actual results may ultimately differ from these estimates.
	Certain amounts in the prior year have been reclassified to conform to current year presentation.
Inventory	'
	Inventories are stated at the lower of cost (first-in, first-out or average) or market.
Share-based Compensation, Option and Incentive Plans	'
	Compensation expense for restricted stock is recognized ratably over the required service period based on the fair value of the grant calculated as the number of shares granted multiplied by the stock price on the date of grant and, for performance shares, the likelihood of achieving the performance criteria. Compensation cost related to stock-based awards with graded vesting is amortized using the straight-line attribution method.
New Accounting Pronouncements	'
	In February 2013, the FASB issued guidance requiring enhanced disclosures for items reclassified out of accumulated other comprehensive income (loss). The guidance does not amend any existing requirements for reporting net income (loss) or other comprehensive income (loss) in the financial statements. This guidance is effective prospectively for annual reporting periods beginning after December 15, 2012, with early adoption permitted. As this new guidance is related to presentation only, the implementation of this guidance in the first quarter of fiscal year 2014 did not have a material effect on the Company’s financial condition or results of operations.
	In April 2014, the FASB issued guidance changing the requirements for reporting discontinued operations where a disposal of a component of an entity or group of components of an entity is required to be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity's operations and financial results when either classified as held for sale, or disposed of by sale or otherwise disposed. The amendment also requires enhanced disclosures about the discontinued operation and disclosure information for other significant dispositions. This guidance is effective prospectively for annual reporting periods beginning after December 15, 2014, with early adoption permitted for disposals that have not been previously reported. The implementation of this guidance is not expected to have a material effect on the Company’s financial condition or results of operations.
	In May 2014, the FASB issued guidance on revenue from contracts with customers. The underlying principle is that an entity will recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods or services. The guidance provides a five-step analysis of transactions to determine when and how revenue is recognized. Other major provisions include capitalization of certain contract costs, consideration of time value of money in the transaction price, and allowing estimates of variable consideration to be recognized before contingencies are resolved, in certain circumstances. The guidance also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from an entity's contracts with customers. This guidance permits the use of either the retrospective or cumulative effect transition method and is effective for annual reporting periods beginning after December 15, 2016; early adoption is not permitted. We have not yet selected a transition method and are currently evaluating the impact of the guidance on the Company's financial condition, results of operations and related disclosures.
	The Company has implemented all new accounting pronouncements that are in effect and that may impact its financial statements and does not believe that there are any other new accounting pronouncements that have been issued that might have a material impact on its financial position or results of operations.

ACQUISITIONS_Tables

ACQUISITIONS (Tables)	9 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	'
	The following table summarizes the fair values of the Cyclone and Northcote assets and liabilities as of the date of acquisition:
		Cyclone			Northcote			Total
	Current Assets, net of cash acquired	$	23,936		$	7,921		$	31,857
	PP&E	491			1,376			1,867
	Goodwill	10,072			11,617			21,689
	Amortizable intangible assets	9,844			6,023			15,867
	Indefinite life intangible assets	1,874			1,686			3,560
	Total assets acquired	46,217			28,623			74,840
	Total liabilities assumed	(6,692		)	(6,842		)	(13,534		)
	Net assets acquired	$	39,525		$	21,781		$	61,306
Schedule of Intangible Assets and Goodwill	'
	The amounts assigned to major intangible asset classifications, none of which are tax deductible, for the Cyclone and Northcote acquisitions are as follows:
		Cyclone			Northcote			Total		Amortization
										Period (Years)
	Goodwill	$	10,072		$	11,617		21,689		N/A
	Tradenames	1,874			1,686			3,560		Indefinite
	Customer relationships	9,844			6,023			15,867		25
		$	21,790		$	19,326		41,116

INVENTORIES_Tables

INVENTORIES (Tables)	9 Months Ended
	Jun. 30, 2014
Inventory Disclosure [Abstract]	'
Schedule of Inventory	'
	The following table details the components of inventory:
		At June 30, 2014		At September 30, 2013
	Raw materials and supplies	$	71,533	$	65,560
	Work in process	69,884		63,930
	Finished goods	137,045		100,630
	Total	$	278,462	$	230,120

PROPERTY_PLANT_AND_EQUIPMENT_T

PROPERTY, PLANT AND EQUIPMENT (Tables)	9 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment	'
	The following table details the components of property, plant and equipment, net:
		At June 30, 2014			At September 30, 2013
	Land, building and building improvements	$	131,270		$	130,905
	Machinery and equipment	715,805			661,094
	Leasehold improvements	38,792			35,884
		885,867			827,883
	Accumulated depreciation and amortization	(520,491		)	(474,290		)
	Total	$	365,376		$	353,593

GOODWILL_AND_OTHER_INTANGIBLES1

GOODWILL AND OTHER INTANGIBLES (Tables)	9 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Goodwill	'
	The following table provides changes in the carrying value of goodwill by segment during the nine months ended June 30, 2014:
		At September 30, 2013		Goodwill from		Other				At June 30, 2014
				2014 acquisitions		adjustments
						including currency
						translations
	Home & Building Products	$	269,802	$	21,689	$	948			$	292,439
	Telephonics	18,545		—		—				18,545
	Plastics	69,383		—		948				70,331
	Total	$	357,730	$	21,689	$	1,896			$	381,315
Schedule Of Identifiable Intangible Assets	'
	The following table provides the gross carrying value and accumulated amortization for each major class of intangible assets:
		At June 30, 2014						At September 30, 2013
		Gross Carrying Amount		Accumulated		Average		Gross Carrying Amount				Accumulated
				Amortization		Life						Amortization
						(Years)
	Customer relationships	$	183,152	$	34,543	25		$	166,985			$	29,049
	Unpatented technology	6,708		3,290		13		6,804				2,916
	Total amortizable intangible assets	189,860		37,833				173,789				31,965
	Trademarks	83,065		—				79,567				—
	Total intangible assets	$	272,925	$	37,833			$	253,356			$	31,965

LONGTERM_DEBT_Tables

LONG-TERM DEBT (Tables)	9 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Debt	'
			At June 30, 2014																	At September 30, 2013
			Outstanding Balance				Original Issuer Discount				Balance Sheet				Capitalized Fees & Expenses			Coupon Interest Rate (1)		Outstanding Balance				Original Issuer Discount				Balance Sheet				Capitalized Fees & Expenses			Coupon Interest Rate (1)
	Senior notes due 2018	(a)	$	—			$	—			$	—			$	—		n/a		$	550,000			$	—			$	550,000			$	7,328		7.1	%
	Senior notes due 2022	(a)	600,000				—				600,000				9,529			5.25	%	—				—				—				—			n/a
	Revolver due 2019	(a)	25,000				—				25,000				2,122			n/a		—				—				—				2,425			n/a
	Convert. debt due 2017	(b)	100,000				(10,532		)		89,468				1,145			4	%	100,000				(13,246		)		86,754				1,478			4	%
	Real estate mortgages	(c)	16,603				—				16,603				612			n/a		13,212				—				13,212				185			n/a
	ESOP Loans	(d)	29,583				—				29,583				233			n/a		21,098				—				21,098				24			n/a
	Capital lease - real estate	(e)	8,798				—				8,798				188			5	%	9,529				—				9,529				207			5	%
	Non U.S. lines of credit	(f)	7,754				—				7,754				—			n/a		4,606				—				4,606				—			n/a
	Non U.S. term loans	(f)	30,612				—				30,612				189			n/a		3,115				—				3,115				27			n/a
	Other long term debt	(g)	1,248				—				1,248				27			n/a		941				—				941				—			n/a
	Totals		819,598				(10,532		)		809,066				$	14,045				702,501				(13,246		)		689,255				$	11,674
	less: Current portion		(11,886		)		—				(11,886		)							(10,768		)		—				(10,768		)
	Long-term debt		$	807,712			$	(10,532	)		$	797,180								$	691,733			$	(13,246	)		$	678,487
	On February 27, 2014, in an unregistered offering through a private placement under Rule 144A, Griffon issued, at par, $600,000 of 5.25% Senior Notes due 2022 (“Senior Notes”); interest is payable semi-annually on March 1 and September 1, starting September 1, 2014. Proceeds from the Senior Notes were used to redeem $550,000 of 7.125% senior notes due 2018, to pay a tender offer premium of $31,530 and to make interest payments of $16,716, with the balance used to pay a portion of the transaction fees and expenses. The Senior Notes are senior unsecured obligations of Griffon guaranteed by certain domestic subsidiaries, and subject to certain covenants, limitations and restrictions. On June 18, 2014, Griffon exchanged all of the Senior Notes for substantially identical Senior Notes registered under the Securities Act of 1933 via an exchange offer.
	In connection with these transactions, Griffon capitalized $9,950 of underwriting fees and other expenses incurred related to issuance of the Senior Notes, which will amortize over the term of such notes. Griffon recognized a loss on the early extinguishment of debt on the 7.125% senior notes aggregating $38,890, comprised of the $31,530 tender offer premium, the write-off of $6,574 of remaining deferred financing fees and $786 of prepaid interest on defeased notes.
	On February 14, 2014, Griffon amended its $225,000 Revolving Credit Facility (“Credit Agreement”) to extend its maturity date from March 28, 2018 to March 28, 2019, and to revise certain financial maintenance and negative covenants to improve Griffon's financial and operating flexibility. The facility includes a letter of credit sub-facility with a limit of $60,000, a multi-currency sub-facility of $50,000 and a swing line sub-facility with a limit of $30,000. Borrowings under the Credit Agreement may be repaid and re-borrowed at any time, subject to final maturity of the facility or the occurrence of a default or an event of default under the Credit Agreement. Interest is payable on borrowings at either a LIBOR or base rate benchmark rate, in each case without a floor, plus an applicable margin, which adjusts based on financial performance. The current margins are 1.25% for base rate loans and 2.25% for LIBOR loans. The Credit Agreement has certain financial maintenance tests including a maximum total leverage ratio, a maximum senior secured leverage ratio and a minimum interest coverage ratio as well as customary affirmative and negative covenants and events of default. The Credit Agreement also includes certain restrictions, such as limitations on the ability of Griffon to incur indebtedness and liens and to make restricted payments and investments. Borrowings under the Credit Agreement are guaranteed by Griffon’s material domestic subsidiaries and are secured, on a first priority basis, by substantially all assets of the Company and the guarantors and a pledge of not greater than 65% of the equity interest in each of Griffon’s material, first-tier foreign subsidiaries (except that a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the debt under the ESOP credit agreement ranks pari passu with the lien granted on such assets under the Credit Agreement; see footnote (d) below).
	At June 30, 2014, outstanding borrowings and standby letters of credit were $25,000 and $20,365, respectively; $179,635 was available for borrowing at that date.
	(b)	On December 21, 2009, Griffon issued $100,000 principal of 4% convertible subordinated notes due 2017 (the “2017 Notes”). The current conversion rate of the 2017 Notes is 68.6238 shares of Griffon’s common stock per $1,000 principal amount of notes, corresponding to a conversion price of $14.53 per share. When a cash dividend is declared that would result in an adjustment to the conversion ratio of less than 1%, any adjustment to the conversion ratio is deferred until the first to occur of (i) actual conversion; (ii) the 42nd trading day prior to maturity of the notes; and (iii) such time as the cumulative adjustment equals or exceeds 1%. As of June 30, 2014, aggregate dividends since the last conversion price adjustment of $0.03 per share would have resulted in an adjustment to the conversion ratio of approximately .27%. At both June 30, 2014 and 2013, the 2017 Notes had a capital in excess of par component, net of tax, of $15,720.
	(c)	On October 21, 2013, Griffon refinanced two properties’ real estate mortgages to secure loans totaling $17,175. The loans mature in October 2018, are collateralized by the related properties and are guaranteed by Griffon. The loans bear interest at a rate of LIBOR plus 2.75%. At June 30, 2014, $16,603 was outstanding.
	(d)	In December 2013, Griffon’s Employee Stock Ownership Plan (“ESOP”) entered into a credit agreement which refinanced the two existing ESOP loans into one new Term Loan in the amount of $21,098. The agreement also provided a Line Note with $10,000 available to purchase shares of Griffon common stock in the open market through September 29, 2014. As of June 30, 2014, 749,977 shares of Griffon common stock, for a total of $10,000, were purchased with proceeds from the Line Note. In March 2014, the Line Note was combined with the Term Loan to form one new term loan. The loan bears interest at a) LIBOR plus 2.25% or b) the lender’s prime rate, at Griffon’s option. The loan requires quarterly principal payments of $505 through September 30, 2014 and $419 per quarter thereafter, with a balloon payment of approximately $22,400 due at maturity in December 2018. The loan is secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment. As of June 30, 2014, $29,583 was outstanding.
	In July 2014, Griffon's ESOP entered into an amendment to the existing agreement which provides for an additional $10,000 Line Note available to purchase shares in the open market. The new Line Note will bear interest at a) LIBOR plus 2.75% or b) the lender’s prime rate, at Griffon’s option, through its expiration date on June 30, 2015. Upon expiration or at an earlier date, at Griffon’s option, the new Line Note will be combined with the Term Loan and require quarterly principal payments based on the remaining amortization schedule at a weighted average interest rate of the combined loans, with a balloon payment due at the final maturity date of December 31, 2018, based on the new amortization schedule. The new Line Note and the Term Loan are secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment.
	(e)	In October 2006, CBP entered into a capital lease totaling $14,290 for real estate in Troy, Ohio. The lease matures in 2022, bears interest at a fixed rate of 5.0%, is secured by a mortgage on the real estate and is guaranteed by Griffon. At June 30, 2014, $8,798 was outstanding.
	(f)	In November 2010, Clopay Europe GmbH (“Clopay Europe”) entered into a €10,000 revolving credit facility and a €20,000 term loan. The term loan was paid off in December 2013 and the revolver had borrowings of $4,093 at June 30, 2014. The revolving facility matures in November 2014, but is renewable upon mutual agreement with the bank. The revolving credit facility accrues interest at EURIBOR plus 2.20% per annum (2.41% at June 30, 2014). Clopay Europe is required to maintain a certain minimum equity to assets ratio and keep leverage below a certain level, defined as the ratio of total debt to EBITDA.
	Clopay do Brazil maintains lines of credit of approximately $5,700. Interest on borrowings accrues at a rate of Brazilian CDI plus 6.0% (16.80% at June 30, 2014). At June 30, 2014 there was $3,660 borrowed under the lines. Clopay Plastic Products Company, Inc. guarantees the loan and lines.
	In November 2012, Garant G.P. (“Garant”) entered into a CAD $15,000 revolving credit facility.  The facility accrues interest at LIBOR (USD) or the Bankers Acceptance Rate (CDN) plus 1.3% per annum (1.46% LIBOR USD and 2.51% Bankers Acceptance Rate CDN as of June 30, 2014). The revolving facility matures in November 2015. Garant is required to maintain a certain minimum equity.  At June 30, 2014, there were no borrowings under the revolving credit facility with CAD $15,000 available for borrowing.
	In December 2013 and May 2014, Northcote Holdings Pty Ltd entered into two term loans in the outstanding amounts of AUD $12,500 and AUD $20,000, respectively. The AUD $12,500 and AUD $20,000 term loans are unsecured and require quarterly interest payments, with quarterly principal payments of $625 beginning in August 2015 on the AUD $20,000 term loan. Remaining principal is due at maturity in December 2016 and May 2017, respectively. The loans accrue interest at Bank Bill Swap Bid Rate “BBSY” plus 2.8% per annum (5.5% at June 30, 2014 for each loan). As of June 30, 2014, Griffon had an outstanding combined balance of $30,612 on the term loans. Subsidiaries of Northcote Holdings Pty Ltd also maintain two lines of credit of AUD $3,000 and AUD $5,000 which accrue interest at BBSY plus 2.25% per annum (5.00% at June 30, 2014) and 2.50% per annum (5.25% at June 30, 2014), respectively. At June 30, 2014, there were no outstanding borrowings under the lines. Griffon Corporation guarantees the term loans and the AUD $3,000 line of credit; the assets of a subsidiary of Northcote Holdings Pty Ltd secures the AUD $5,000 line of credit.
	(g) Other long-term debt primarily consists of capital leases.
Schedule of Interest Expense For Long Term Debt	'
			Three Months Ended June 30, 2014																	Three Months Ended June 30, 2013
			Effective Interest Rate (1)			Cash Interest				Amort. Debt				Amort.			Total Interest Expense			Effective Interest Rate (1)			Cash Interest				Amort. Debt				Amort.			Total Interest Expense
										Discount				Deferred Cost													Discount				Deferred Cost
														& Other Fees																	& Other Fees
	Senior notes due 2018	(a)	n/a			$	—			$	—			$	—		$	—		7.4	%		$	9,797			$	—			$	406		$	10,203
	Senior notes due 2022	(a)	5.5	%		7,875				—				310			8,185			n/a			—				—				—			—
	Revolver due 2019	(a)	n/a			309				—				144			453			n/a			179				—				131			310
	Convert. debt due 2017	(b)	9.1	%		1,000				921				112			2,033			9.1	%		1,000				846				110			1,956
	Real estate mortgages	(c)	3.8	%		124				—				35			159			4.9	%		133				—				22			155
	ESOP Loans	(d)	2.9	%		192				—				25			217			2.8	%		151				—				2			153
	Capital lease - real estate	(e)	5.3	%		112				—				5			117			5.3	%		125				—				6			131
	Non U.S. lines of credit	(f)	n/a			307				—				27			334			n/a			155				—				—			155
	Non U.S. term loans	(f)	n/a			273				—				13			286			n/a			109				—				26			135
	Other long term debt	(g)	n/a			6				—				9			15			n/a			272				—				—			272
	Capitalized interest					(138		)		—				—			(138		)				(191		)		—				—			(191		)
	Totals					$	10,060			$	921			$	680		$	11,661					$	11,730			$	846			$	703		$	13,279
			Nine Months Ended June 30, 2014																	Nine Months Ended June 30, 2013
			Effective Interest Rate (1)			Cash Interest				Amort. Debt Discount				Amort. Deferred Cost & Other Fees			Total Interest Expense			Effective Interest Rate (1)			Cash Interest				Amort. Debt Discount				Amort. Deferred Cost & Other Fees			Total Interest Expense
	Senior notes due 2018	(a)	7.4	%		$	15,930			$	—			$	667		$	16,597		7.4	%		$	29,391			$	—			$	1,217		$	30,608
	Senior notes due 2022	(a)	5.5	%		10,675				—				421			11,096			n/a			—				—				—			—
	Revolver due 2019	(a)	n/a			782				—				422			1,204			n/a			603				—				444			1,047
	Convert. debt due 2017	(b)	9.1	%		3,000				2,713				333			6,046			9.2	%		3,000				2,491				332			5,823
	Real estate mortgages	(c)	4	%		376				—				108			484			4.9	%		407				—				65			472
	ESOP Loans	(d)	3.2	%		524				—				32			556			2.9	%		476				—				6			482
	Capital lease - real estate	(e)	5.4	%		345				—				19			364			5.3	%		381				—				19			400
	Non U.S. lines of credit	(f)	n/a			724				—				27			751			n/a			415				—				—			415
	Non U.S. term loans	(f)	n/a			426				—				17			443			n/a			415				—				77			492
	Other long term debt	(g)	n/a			17				—				30			47			n/a			523				—				—			523
	Capitalized interest					(404		)		—				—			(404		)				(816		)		—				—			(816		)
	Totals					$	32,395			$	2,713			$	2,076		$	37,184					$	34,795			$	2,491			$	2,160		$	39,446
	On February 27, 2014, in an unregistered offering through a private placement under Rule 144A, Griffon issued, at par, $600,000 of 5.25% Senior Notes due 2022 (“Senior Notes”); interest is payable semi-annually on March 1 and September 1, starting September 1, 2014. Proceeds from the Senior Notes were used to redeem $550,000 of 7.125% senior notes due 2018, to pay a tender offer premium of $31,530 and to make interest payments of $16,716, with the balance used to pay a portion of the transaction fees and expenses. The Senior Notes are senior unsecured obligations of Griffon guaranteed by certain domestic subsidiaries, and subject to certain covenants, limitations and restrictions. On June 18, 2014, Griffon exchanged all of the Senior Notes for substantially identical Senior Notes registered under the Securities Act of 1933 via an exchange offer.
	In connection with these transactions, Griffon capitalized $9,950 of underwriting fees and other expenses incurred related to issuance of the Senior Notes, which will amortize over the term of such notes. Griffon recognized a loss on the early extinguishment of debt on the 7.125% senior notes aggregating $38,890, comprised of the $31,530 tender offer premium, the write-off of $6,574 of remaining deferred financing fees and $786 of prepaid interest on defeased notes.
	On February 14, 2014, Griffon amended its $225,000 Revolving Credit Facility (“Credit Agreement”) to extend its maturity date from March 28, 2018 to March 28, 2019, and to revise certain financial maintenance and negative covenants to improve Griffon's financial and operating flexibility. The facility includes a letter of credit sub-facility with a limit of $60,000, a multi-currency sub-facility of $50,000 and a swing line sub-facility with a limit of $30,000. Borrowings under the Credit Agreement may be repaid and re-borrowed at any time, subject to final maturity of the facility or the occurrence of a default or an event of default under the Credit Agreement. Interest is payable on borrowings at either a LIBOR or base rate benchmark rate, in each case without a floor, plus an applicable margin, which adjusts based on financial performance. The current margins are 1.25% for base rate loans and 2.25% for LIBOR loans. The Credit Agreement has certain financial maintenance tests including a maximum total leverage ratio, a maximum senior secured leverage ratio and a minimum interest coverage ratio as well as customary affirmative and negative covenants and events of default. The Credit Agreement also includes certain restrictions, such as limitations on the ability of Griffon to incur indebtedness and liens and to make restricted payments and investments. Borrowings under the Credit Agreement are guaranteed by Griffon’s material domestic subsidiaries and are secured, on a first priority basis, by substantially all assets of the Company and the guarantors and a pledge of not greater than 65% of the equity interest in each of Griffon’s material, first-tier foreign subsidiaries (except that a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the debt under the ESOP credit agreement ranks pari passu with the lien granted on such assets under the Credit Agreement; see footnote (d) below).
	At June 30, 2014, outstanding borrowings and standby letters of credit were $25,000 and $20,365, respectively; $179,635 was available for borrowing at that date.
	(b)	On December 21, 2009, Griffon issued $100,000 principal of 4% convertible subordinated notes due 2017 (the “2017 Notes”). The current conversion rate of the 2017 Notes is 68.6238 shares of Griffon’s common stock per $1,000 principal amount of notes, corresponding to a conversion price of $14.53 per share. When a cash dividend is declared that would result in an adjustment to the conversion ratio of less than 1%, any adjustment to the conversion ratio is deferred until the first to occur of (i) actual conversion; (ii) the 42nd trading day prior to maturity of the notes; and (iii) such time as the cumulative adjustment equals or exceeds 1%. As of June 30, 2014, aggregate dividends since the last conversion price adjustment of $0.03 per share would have resulted in an adjustment to the conversion ratio of approximately .27%. At both June 30, 2014 and 2013, the 2017 Notes had a capital in excess of par component, net of tax, of $15,720.
	(c)	On October 21, 2013, Griffon refinanced two properties’ real estate mortgages to secure loans totaling $17,175. The loans mature in October 2018, are collateralized by the related properties and are guaranteed by Griffon. The loans bear interest at a rate of LIBOR plus 2.75%. At June 30, 2014, $16,603 was outstanding.
	(d)	In December 2013, Griffon’s Employee Stock Ownership Plan (“ESOP”) entered into a credit agreement which refinanced the two existing ESOP loans into one new Term Loan in the amount of $21,098. The agreement also provided a Line Note with $10,000 available to purchase shares of Griffon common stock in the open market through September 29, 2014. As of June 30, 2014, 749,977 shares of Griffon common stock, for a total of $10,000, were purchased with proceeds from the Line Note. In March 2014, the Line Note was combined with the Term Loan to form one new term loan. The loan bears interest at a) LIBOR plus 2.25% or b) the lender’s prime rate, at Griffon’s option. The loan requires quarterly principal payments of $505 through September 30, 2014 and $419 per quarter thereafter, with a balloon payment of approximately $22,400 due at maturity in December 2018. The loan is secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment. As of June 30, 2014, $29,583 was outstanding.
	In July 2014, Griffon's ESOP entered into an amendment to the existing agreement which provides for an additional $10,000 Line Note available to purchase shares in the open market. The new Line Note will bear interest at a) LIBOR plus 2.75% or b) the lender’s prime rate, at Griffon’s option, through its expiration date on June 30, 2015. Upon expiration or at an earlier date, at Griffon’s option, the new Line Note will be combined with the Term Loan and require quarterly principal payments based on the remaining amortization schedule at a weighted average interest rate of the combined loans, with a balloon payment due at the final maturity date of December 31, 2018, based on the new amortization schedule. The new Line Note and the Term Loan are secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment.
	(e)	In October 2006, CBP entered into a capital lease totaling $14,290 for real estate in Troy, Ohio. The lease matures in 2022, bears interest at a fixed rate of 5.0%, is secured by a mortgage on the real estate and is guaranteed by Griffon. At June 30, 2014, $8,798 was outstanding.
	(f)	In November 2010, Clopay Europe GmbH (“Clopay Europe”) entered into a €10,000 revolving credit facility and a €20,000 term loan. The term loan was paid off in December 2013 and the revolver had borrowings of $4,093 at June 30, 2014. The revolving facility matures in November 2014, but is renewable upon mutual agreement with the bank. The revolving credit facility accrues interest at EURIBOR plus 2.20% per annum (2.41% at June 30, 2014). Clopay Europe is required to maintain a certain minimum equity to assets ratio and keep leverage below a certain level, defined as the ratio of total debt to EBITDA.
	Clopay do Brazil maintains lines of credit of approximately $5,700. Interest on borrowings accrues at a rate of Brazilian CDI plus 6.0% (16.80% at June 30, 2014). At June 30, 2014 there was $3,660 borrowed under the lines. Clopay Plastic Products Company, Inc. guarantees the loan and lines.
	In November 2012, Garant G.P. (“Garant”) entered into a CAD $15,000 revolving credit facility.  The facility accrues interest at LIBOR (USD) or the Bankers Acceptance Rate (CDN) plus 1.3% per annum (1.46% LIBOR USD and 2.51% Bankers Acceptance Rate CDN as of June 30, 2014). The revolving facility matures in November 2015. Garant is required to maintain a certain minimum equity.  At June 30, 2014, there were no borrowings under the revolving credit facility with CAD $15,000 available for borrowing.
	In December 2013 and May 2014, Northcote Holdings Pty Ltd entered into two term loans in the outstanding amounts of AUD $12,500 and AUD $20,000, respectively. The AUD $12,500 and AUD $20,000 term loans are unsecured and require quarterly interest payments, with quarterly principal payments of $625 beginning in August 2015 on the AUD $20,000 term loan. Remaining principal is due at maturity in December 2016 and May 2017, respectively. The loans accrue interest at Bank Bill Swap Bid Rate “BBSY” plus 2.8% per annum (5.5% at June 30, 2014 for each loan). As of June 30, 2014, Griffon had an outstanding combined balance of $30,612 on the term loans. Subsidiaries of Northcote Holdings Pty Ltd also maintain two lines of credit of AUD $3,000 and AUD $5,000 which accrue interest at BBSY plus 2.25% per annum (5.00% at June 30, 2014) and 2.50% per annum (5.25% at June 30, 2014), respectively. At June 30, 2014, there were no outstanding borrowings under the lines. Griffon Corporation guarantees the term loans and the AUD $3,000 line of credit; the assets of a subsidiary of Northcote Holdings Pty Ltd secures the AUD $5,000 line of credit.
	(g) Other long-term debt primarily consists of capital leases.

EARNINGS_PER_SHARE_EPS_Tables

EARNINGS PER SHARE (EPS) (Tables)	9 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted	'
	The following table is a reconciliation of the share amounts (in thousands) used in computing earnings per share:
		Three Months Ended June 30,		Nine Months Ended June 30,
		2014	2013	2014	2013
	Weighted average shares outstanding - basic	48,370	54,265	50,038	54,588
	Incremental shares from stock based compensation	1,466	1,939	—	2,147
	Weighted average shares outstanding - diluted	49,836	56,204	50,038	56,735
	Anti-dilutive options excluded from diluted EPS computation	643	715	643	715
	Anti-dilutive restricted stock excluded from diluted EPS computation	—	—	1,609	—

BUSINESS_SEGMENTS_Tables

BUSINESS SEGMENTS (Tables)	9 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Schedule of Segment Reporting Information, by Segment	'
	Information on Griffon’s business segments is as follows:
		For the Three Months Ended June 30,						For the Nine Months Ended June 30,
	REVENUE	2014			2013			2014			2013
	Home & Building Products:
	Ames	$	132,179		$	128,332		$	389,492		$	341,878
	CBP	121,814			112,285			334,494			314,651
	Home & Building Products	253,993			240,617			723,986			656,529
	Telephonics	102,446			129,997			302,656			347,678
	Plastics	148,600			139,212			439,542			418,111
	Total consolidated net sales	$	505,039		$	509,826		$	1,466,184		$	1,422,318
	The following table reconciles segment operating profit to Loss before taxes:
		For the Three Months Ended June 30,						For the Nine Months Ended June 30,
	INCOME (LOSS) BEFORE TAXES	2014			2013			2014			2013
	Segment operating profit:
	Home & Building Products	$	9,747		$	11,549		$	27,958		$	22,655
	Telephonics	13,134			10,592			34,463			38,990
	Plastics	8,075			5,401			23,252			8,959
	Total segment operating profit	30,956			27,542			85,673			70,604
	Net interest expense	(11,541		)	(13,137		)	(37,003		)	(39,125		)
	Unallocated amounts	(6,521		)	(6,573		)	(22,895		)	(22,140		)
	Loss from debt extinguishment, net	—			—			(38,890		)	—
	Loss on pension settlement	—			—			—			(2,142		)
	Income (loss) before taxes	$	12,894		$	7,832		$	(13,115	)	$	7,197
	The following table provides a reconciliation of Segment adjusted EBITDA to Income (loss) before taxes:
		For the Three Months Ended June 30,						For the Nine Months Ended June 30,
		2014			2013			2014			2013
	Segment adjusted EBITDA:
	Home & Building Products	$	19,596		$	21,478		$	55,787		$	56,272
	Telephonics	15,087			13,146			40,018			45,015
	Plastics	14,922			12,161			43,881			33,832
	Total Segment adjusted EBITDA	49,605			46,785			139,686			135,119
	Net interest expense	(11,541		)	(13,137		)	(37,003		)	(39,125		)
	Segment depreciation and amortization	(16,691		)	(17,639		)	(49,723		)	(52,467		)
	Unallocated amounts	(6,521		)	(6,573		)	(22,895		)	(22,140		)
	Loss from debt extinguishment, net	—			—			(38,890		)	—
	Restructuring charges	(358		)	(1,604		)	(1,892		)	(12,048		)
	Acquisition costs	(1,600		)	—			(2,398		)	—
	Loss on pension settlement	—			—			—			(2,142		)
	Income (loss) before taxes	$	12,894		$	7,832		$	(13,115	)	$	7,197
	Unallocated amounts typically include general corporate expenses not attributable to a reportable segment.
		For the Three Months Ended June 30,						For the Nine Months Ended June 30,
	DEPRECIATION and AMORTIZATION	2014			2013			2014			2013
	Segment:
	Home & Building Products	$	7,891		$	9,075		$	23,539		$	27,092
	Telephonics	1,953			1,804			5,555			5,275
	Plastics	6,847			6,760			20,629			20,100
	Total segment depreciation and amortization	16,691			17,639			49,723			52,467
	Corporate	104			110			304			320
	Total consolidated depreciation and amortization	$	16,795		$	17,749		$	50,027		$	52,787
	CAPITAL EXPENDITURES
	Segment:
	Home & Building Products	$	8,194		$	6,534		$	23,384		$	22,352
	Telephonics	6,082			2,401			14,969			5,853
	Plastics	5,063			5,947			15,213			17,648
	Total segment	19,339			14,882			53,566			45,853
	Corporate	675			9			1,293			33
	Total consolidated capital expenditures	$	20,014		$	14,891		$	54,859		$	45,886
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	'
	ASSETS	At June 30, 2014			At September 30, 2013
	Segment assets:
	Home & Building Products	$	1,020,849		$	908,386
	Telephonics	299,058			296,919
	Plastics	421,892			422,730
	Total segment assets	1,741,799			1,628,035
	Corporate	85,210			156,455
	Total continuing assets	1,827,009			1,784,490
	Assets of discontinued operations	4,241			4,289
	Consolidated total	$	1,831,250		$	1,788,779

DEFINED_BENEFIT_PENSION_EXPENS1

DEFINED BENEFIT PENSION EXPENSE (Tables)	9 Months Ended
	Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Schedule of Defined Benefit Plans Disclosures	'
	Defined benefit pension expense was as follows:
		Three Months Ended June 30,						Nine Months Ended June 30,
		2014			2013			2014			2013
	Service cost	$	—		$	51		$	90		$	149
	Interest cost	2,416			2,427			7,415			7,274
	Expected return on plan assets	(2,820		)	(3,139		)	(8,590		)	(9,413		)
	Amortization:
	Prior service cost	4			5			11			15
	Recognized actuarial loss	485			840			1,463			2,520
	Loss on pension settlement	—			—			—			2,142
	Net periodic expense	$	85		$	184		$	389		$	2,687

DISCONTINUED_OPERATIONS_Tables

DISCONTINUED OPERATIONS (Tables)	9 Months Ended
	Jun. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures	'
	The following amounts related to the Installation Services segment, discontinued in 2008, and other businesses discontinued several years ago, which have been segregated from Griffon’s continuing operations, and are reported as assets and liabilities of discontinued operations in the condensed consolidated balance sheets:
		At June 30, 2014		At September 30, 2013
	Assets of discontinued operations:
	Prepaid and other current assets	$	1,209	$	1,214
	Other long-term assets	3,032		3,075
	Total assets of discontinued operations	$	4,241	$	4,289
	Liabilities of discontinued operations:
	Accrued liabilities, current	$	2,959	$	3,288
	Other long-term liabilities	4,008		4,744
	Total liabilities of discontinued operations	$	6,967	$	8,032

RESTRUCTURING_AND_OTHER_RELATE1

RESTRUCTURING AND OTHER RELATED CHARGES (Tables)	9 Months Ended
	Jun. 30, 2014
Restructuring and Related Activities [Abstract]	'
Schedule Of Restructuring And Other Related Charges	'
	A summary of the restructuring and other related charges included in the line item “Restructuring and other related charges” in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) were recognized as follows:
		Workforce			Facilities &			Other			Non-cash			Total
		Reduction			Exit Costs			Related			Facility and
								Costs			Other
	Amounts incurred in:
	Quarter ended December 31, 2012	$	994		$	39		$	75		$	—		$	1,108
	Quarter ended March 31, 2013	3,635			683			1,517			3,501			9,336
	Quarter ended June 30, 2013	$	641		$	926		$	37		$	—		$	1,604
	Nine Months Ended June 30, 2013	$	5,270		$	1,648		$	1,629		$	3,501		$	12,048
	Quarter ended December 31, 2013	$	638		$	95		$	109		$	—		$	842
	Quarter ended March 31, 2014	495			137			60			—			692
	Quarter ended June 30, 2014	$	289		$	47		$	22		$	—		$	358
	Nine Months Ended June 30, 2014	$	1,422		$	279		$	191		$	—		$	1,892
Schedule of Restructuring Reserve by Type of Cost	'
	The activity in the restructuring accrual recorded in accrued liabilities consisted of the following:
		Workforce			Facilities &			Other			Total
		Reduction			Exit Costs			Related
	Accrued liability at September 30, 2013	$	3,057		$	393		$	407		$	3,857
	Charges	1,422			279			191			1,892
	Payments	(3,151		)	(599		)	(466		)	(4,216		)
	Accrued liability at June 30, 2014	$	1,328		$	73		$	132		$	1,533

WARRANTY_LIABILITY_Tables

WARRANTY LIABILITY (Tables)	9 Months Ended
	Jun. 30, 2014
Product Warranties Disclosures [Abstract]	'
Schedule of Product Warranty Liability	'
	Changes in Griffon’s warranty liability, included in Accrued liabilities, were as follows:
		Three Months Ended June 30,						Nine Months Ended June 30,
		2014			2013			2014			2013
	Balance, beginning of period	$	7,111		$	7,424		$	6,649		$	8,856
	Warranties issued and changes in estimated pre-existing warranties	576			1,309			2,677			1,965
	Actual warranty costs incurred	(1,199		)	(1,342		)	(2,838		)	(3,430		)
	Balance, end of period	$	6,488		$	7,391		$	6,488		$	7,391

OTHER_COMPREHENSIVE_INCOME_LOS1

OTHER COMPREHENSIVE INCOME (LOSS) (Tables)	9 Months Ended
	Jun. 30, 2014
Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Comprehensive Income (Loss)	'
	The amounts recognized in other comprehensive income (loss) were as follows:
		Three Months Ended June 30, 2014									Three Months Ended June 30, 2013
		Pre-tax			Tax			Net of tax			Pre-tax			Tax			Net of tax
	Foreign currency translation adjustments	$	2,809		$	—		$	2,809		$	(7,884	)	$	—		$	(7,884	)
	Pension and other defined benefit plans	491			(174		)	317			823			(333		)	490
	Gain on cash flow hedge	—			—			—			(158		)	—			(158		)
	Total other comprehensive income (loss)	$	3,300		$	(174	)	$	3,126		$	(7,219	)	$	(333	)	$	(7,552	)
		Nine Months Ended June 30, 2014									Nine Months Ended June 30, 2013
		Pre-tax			Tax			Net of tax			Pre-tax			Tax			Net of tax
	Foreign currency translation adjustments	$	896		$	—		$	896		$	(10,805	)	$	—		$	(10,805	)
	Pension and other defined benefit plans	2,682			(950		)	1,732			8,127			(3,288		)	4,839
	Gain on cash flow hedge	—			—			—			13			—			13
	Total other comprehensive income (loss)	$	3,578		$	(950	)	$	2,628		$	(2,665	)	$	(3,288	)	$	(5,953	)
Reclassification out of Accumulated Other Comprehensive Income	'
	Amounts reclassified from accumulated other comprehensive income (loss) to income (loss) were as follows:
		Three Months Ended June 30,						Nine Months Ended June 30,
		2014			2013			2014			2013
	Pension amortization	$	489		$	845		$	1,474		$	2,535
	Pension settlement	—			—			—			2,142
	Total before tax	489			845			1,474			4,677
	Tax	(167		)	(296		)	(516		)	(1,341		)
	Net of tax	$	322		$	549		$	958		$	3,336

CONSOLIDATING_GUARANTOR_AND_NO1

CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Tables)	9 Months Ended
	Jun. 30, 2014
Consolidating Guarantor And Non Guarantor Financial Information [Abstract]	'
Condensed Balance Sheet	'
	CONDENSED CONSOLIDATING BALANCE SHEETS
	At June 30, 2014
		Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
	CURRENT ASSETS
	Cash and equivalents	$	9,208		$	19,500		$	58,729		$	—		$	87,437
	Accounts receivable, net of allowances	—			222,754			78,918			(32,003		)	269,669
	Contract costs and recognized income not yet billed, net of progress payments	—			104,518			359			—			104,877
	Inventories, net	—			200,772			77,550			140			278,462
	Prepaid and other current assets	21,180			23,835			18,714			10,561			74,290
	Assets of discontinued operations	—			—			1,209			—			1,209
	Total Current Assets	30,388			571,379			235,479			(21,302		)	815,944
	PROPERTY, PLANT AND EQUIPMENT, net	1,392			261,632			102,352			—			365,376
	GOODWILL	—			288,147			93,168			—			381,315
	INTANGIBLE ASSETS, net	—			157,861			77,231			—			235,092
	INTERCOMPANY RECEIVABLE	547,665			877,793			122,932			(1,548,390		)	—
	EQUITY INVESTMENTS IN SUBSIDIARIES	802,548			682,810			1,916,521			(3,401,879		)	—
	OTHER ASSETS	46,687			51,205			7,812			(75,213		)	30,491
	ASSETS OF DISCONTINUED OPERATIONS	—			—			3,032			—			3,032
	Total Assets	$	1,428,680		$	2,890,827		$	2,558,527		$	(5,046,784	)	$	1,831,250
	CURRENT LIABILITIES
	Notes payable and current portion of long-term debt	$	1,762		$	1,129		$	8,995		$	—		$	11,886
	Accounts payable and accrued liabilities	33,353			187,496			84,571			(20,647		)	284,773
	Liabilities of discontinued operations	—			—			2,959			—			2,959
	Total Current Liabilities	35,115			188,625			96,525			(20,647		)	299,618
	LONG-TERM DEBT, net of debt discounts	742,289			8,096			46,795			—			797,180
	INTERCOMPANY PAYABLES	21,450			746,378			733,551			(1,501,379		)	—
	OTHER LIABILITIES	61,485			149,029			25,921			(74,332		)	162,103
	LIABILITIES OF DISCONTINUED OPERATIONS	—			—			4,008			—			4,008
	Total Liabilities	860,339			1,092,128			906,800			(1,596,358		)	1,262,909
	SHAREHOLDERS’ EQUITY	568,341			1,798,699			1,651,727			(3,450,426		)	568,341
	Total Liabilities and Shareholders’ Equity	$	1,428,680		$	2,890,827		$	2,558,527		$	(5,046,784	)	$	1,831,250
	CONDENSED CONSOLIDATING BALANCE SHEETS
	At September 30, 2013
		Parent			Guarantor			Non-Guarantor			Elimination			Consolidation
		Company			Companies			Companies
	CURRENT ASSETS
	Cash and equivalents	$	68,994		$	25,343		$	83,793		$	—		$	178,130
	Accounts receivable, net of allowances	—			213,506			76,241			(33,532		)	256,215
	Contract costs and recognized income not yet billed, net of progress payments	—			109,683			145			—			109,828
	Inventories, net	—			173,406			56,723			(9		)	230,120
	Prepaid and other current assets	(712		)	21,854			17,330			10,431			48,903
	Assets of discontinued operations	—			—			1,214			—			1,214
	Total Current Assets	68,282			543,792			235,446			(23,110		)	824,410
	PROPERTY, PLANT AND EQUIPMENT, net	972			248,973			103,648			—			353,593
	GOODWILL	—			288,146			69,584			—			357,730
	INTANGIBLE ASSETS, net	—			160,349			61,042			—			221,391
	INTERCOMPANY RECEIVABLE	547,903			911,632			573,269			(2,032,804		)	—
	EQUITY INVESTMENTS IN SUBSIDIARIES	772,374			533,742			2,718,956			(4,025,072		)	—
	OTHER ASSETS	45,968			50,423			7,423			(75,234		)	28,580
	ASSETS OF DISCONTINUED OPERATIONS	—			—			3,075			—			3,075
	Total Assets	$	1,435,499		$	2,737,057		$	3,772,443		$	(6,156,220	)	$	1,788,779
	CURRENT LIABILITIES
	Notes payable and current portion of long-term debt	$	1,000		$	1,079		$	8,689		$	—		$	10,768
	Accounts payable and accrued liabilities	41,121			183,665			70,427			(24,860		)	270,353
	Liabilities of discontinued operations	—			—			3,288			—			3,288
	Total Current Liabilities	42,121			184,744			82,404			(24,860		)	284,409
	LONG-TERM DEBT, net of debt discounts	656,852			9,006			12,629			—			678,487
	INTERCOMPANY PAYABLES	20,607			796,741			1,188,017			(2,005,365		)	—
	OTHER LIABILITIES	65,455			153,970			25,578			(74,328		)	170,675
	LIABILITIES OF DISCONTINUED OPERATIONS	—			—			4,744			—			4,744
	Total Liabilities	785,035			1,144,461			1,313,372			(2,104,553		)	1,138,315
	SHAREHOLDERS’ EQUITY	650,464			1,592,596			2,459,071			(4,051,667		)	650,464
	Total Liabilities and Shareholders’ Equity	$	1,435,499		$	2,737,057		$	3,772,443		$	(6,156,220	)	$	1,788,779
Condensed Income Statement	'
	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)
	For the Three Months Ended June 30, 2014
	($ in thousands)	Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
	Revenue	$	—		$	392,361		$	126,343		$	(13,665	)	$	505,039
	Cost of goods and services	—			295,148			103,938			(12,354		)	386,732
	Gross profit	—			97,213			22,405			(1,311		)	118,307
	Selling, general and administrative expenses	7,034			71,110			19,617			(1,626		)	96,135
	Restructuring and other related charges	—			349			9			—			358
	Total operating expenses	7,034			71,459			19,626			(1,626		)	96,493
	Income (loss) from operations	(7,034		)	25,754			2,779			315			21,814
	Other income (expense)
	Interest income (expense), net	(1,750		)	(7,367		)	(2,424		)	—			(11,541		)
	Loss from debt extinguishment, net	—			—			—			—			—
	Other, net	1,436			2,497			(997		)	(315		)	2,621
	Total other income (expense)	(314		)	(4,870		)	(3,421		)	(315		)	(8,920		)
	Income (loss) before taxes	(7,348		)	20,884			(642		)	—			12,894
	Provision (benefit) for income taxes	(9,322		)	7,322			430			—			(1,570		)
	Income (loss) before equity in net income of subsidiaries	1,974			13,562			(1,072		)	—			14,464
	Equity in net income (loss) of subsidiaries	12,490			(1,161		)	13,562			(24,891		)	—
	Net income (loss)	$	14,464		$	12,401		$	12,490		$	(24,891	)	$	14,464
	Net Income (loss)	$	14,464		$	12,401		$	12,490		$	(24,891	)	$	14,464
	Other comprehensive income (loss), net of taxes	171			(592		)	3,547			—			3,126
	Comprehensive income (loss)	$	14,635		$	11,809		$	16,037		$	(24,891	)	$	17,590
	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)
	For the Three Months Ended June 30, 2013
	($ in thousands)	Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
	Revenue	$	—		$	408,371		$	114,004		$	(12,549	)	$	509,826
	Cost of goods and services	—			317,156			95,461			(11,102		)	401,515
	Gross profit	—			91,215			18,543			(1,447		)	108,311
	Selling, general and administrative expenses	4,141			69,015			14,793			(1,604		)	86,345
	Restructuring and other related charges	—			1,565			39			—			1,604
	Total operating expenses	4,141			70,580			14,832			(1,604		)	87,949
	Income (loss) from operations	(4,141		)	20,635			3,711			157			20,362
	Other income (expense)
	Interest income (expense), net	(3,559		)	(6,982		)	(2,596		)	—			(13,137		)
	Other, net	12			2,462			(1,710		)	(157		)	607
	Total other income (expense)	(3,547		)	(4,520		)	(4,306		)	(157		)	(12,530		)
	Income (loss) before taxes	(7,688		)	16,115			(595		)	—			7,832
	Provision (benefit) for income taxes	(2,913		)	6,745			397			—			4,229
	Income (loss) before equity in net income of subsidiaries	(4,775		)	9,370			(992		)	—			3,603
	Equity in net income (loss) of subsidiaries	8,378			(969		)	9,370			(16,779		)	—
	Net income (loss)	$	3,603		$	8,401		$	8,378		$	(16,779	)	$	3,603
	Net Income (loss)	$	3,603		$	8,401		$	8,378		$	(16,779	)	$	3,603
	Other comprehensive income (loss), net of taxes	211			836			(8,599		)	—			(7,552		)
	Comprehensive income (loss)	$	3,814		$	9,237		$	(221	)	$	(16,779	)	$	(3,949	)
	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)
	For the Nine Months Ended June 30, 2014
		Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
	Revenue	$	—		$	1,133,510		$	375,877		$	(43,203	)	$	1,466,184
	Cost of goods and services	—			860,322			310,887			(38,822		)	1,132,387
	Gross profit	—			273,188			64,990			(4,381		)	333,797
	Selling, general and administrative expenses	20,525			207,725			50,025			(4,838		)	273,437
	Restructuring and other related charges	—			1,841			51			—			1,892
	Total operating expenses	20,525			209,566			50,076			(4,838		)	275,329
	Income (loss) from operations	(20,525		)	63,622			14,914			457			58,468
	Other income (expense)
	Interest income (expense), net	(8,240		)	(21,946		)	(6,817		)	—			(37,003		)
	Loss from debt extinguishment, net	(38,890		)	—			—			—			(38,890		)
	Other, net	1,563			5,569			(2,365		)	(457		)	4,310
	Total other income (expense)	(45,567		)	(16,377		)	(9,182		)	(457		)	(71,583		)
	Income (loss) before taxes	(66,092		)	47,245			5,732			—			(13,115		)
	Provision (benefit) for income taxes	(24,901		)	19,014			897			—			(4,990		)
	Income (loss) before equity in net income of subsidiaries	(41,191		)	28,231			4,835			—			(8,125		)
Equity in net income (loss) of subsidiaries	33,066			4,587			28,231			(65,884		)	—
Net income (loss)	$	(8,125	)	$	32,818		$	33,066		$	(65,884	)	$	(8,125	)
Net Income (loss)	$	(8,125	)	$	32,818		$	33,066		$	(65,884	)	$	(8,125	)
Other comprehensive income (loss), net of taxes	511			1,277			840			—			2,628
Comprehensive income (loss)	$	(7,614	)	$	34,095		$	33,906		$	(65,884	)	$	(5,497	)
CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)
For the Nine Months Ended June 30, 2013
	Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
Revenue	$	—		$	1,109,275		$	352,514		$	(39,471	)	$	1,422,318
Cost of goods and services	—			848,342			297,826			(35,328		)	1,110,840
Gross profit	—			260,933			54,688			(4,143		)	311,478
Selling, general and administrative expenses	15,419			198,601			45,327			(4,724		)	254,623
Restructuring and other related charges	—			8,045			4,003			—			12,048
Total operating expenses	15,419			206,646			49,330			(4,724		)	266,671
Income (loss) from operations	(15,419		)	54,287			5,358			581			44,807
Other income (expense)
Interest income (expense), net	(10,781		)	(20,685		)	(7,659		)	—			(39,125		)
Other, net	367			6,227			(4,498		)	(581		)	1,515
Total other income (expense)	(10,414		)	(14,458		)	(12,157		)	(581		)	(37,610		)
Income (loss) before taxes	(25,833		)	39,829			(6,799		)	—			7,197
Provision (benefit) for income taxes	(12,672		)	15,693			834			—			3,855
Income (loss) before equity in net income of subsidiaries	(13,161		)	24,136			(7,633		)	—			3,342
Equity in net income (loss) of subsidiaries	16,503			(7,565		)	24,136			(33,074		)	—
Net income (loss)	$	3,342		$	16,571		$	16,503		$	(33,074	)	$	3,342
Net Income (loss)	$	3,342		$	16,571		$	16,503		$	(33,074	)	$	3,342
Foreign currency translation adjustments	—			330			(11,135		)	—			(10,805		)
Other comprehensive income (loss), net of taxes	633			3,963			256			—			4,852
Comprehensive income (loss)	$	3,975		$	20,864		$	5,624		$	(33,074	)	$	(2,611	)
Condensed Cash Flow Statement	'
	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
	For the Nine Months Ended June 30, 2014
		Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
	CASH FLOWS FROM OPERATING ACTIVITIES:
	Net income (loss)	$	(8,125	)	$	32,818		$	33,066		$	(65,884	)	$	(8,125	)
	Net cash provided by (used in) operating activities	(10,966		)	(8,300		)	69,122			—			49,856
	CASH FLOWS FROM INVESTING ACTIVITIES:
	Acquisition of property, plant and equipment	(672		)	(45,749		)	(8,438		)	—			(54,859		)
	Acquired businesses, net of cash acquired	—			(1,000		)	(61,306		)	—			(62,306		)
	Intercompany distributions	10,000			(10,000		)	—			—			—
	Investment purchases	(8,402		)	—			—			—			(8,402		)
	Proceeds from sale of assets	—			298			193			—			491
	Net cash provided by (used in) investing activities	926			(56,451		)	(69,551		)	—			(125,076		)
	CASH FLOWS FROM FINANCING ACTIVITIES:
	Proceeds from issuance of common stock	584			—			—			—			584
	Purchase of shares for treasury	(72,518		)	—			—			—			(72,518		)
	Proceeds from long-term debt	649,568			(253		)	33,598			—			682,913
	Payments of long-term debt	(597,613		)	(708		)	(3,813		)	—			(602,134		)
	Change in short-term borrowings	—			—			3,138			—			3,138
	Financing costs	(10,393		)	—			(535		)	—			(10,928		)
	Purchase of ESOP shares	(10,000		)	—			—			—			(10,000		)
	Tax effect from exercise/vesting of equity awards, net	273			—			—			—			273
	Dividend	(9,841		)	5,000			—			—			(4,841		)
	Other, net	194			54,869			(54,869		)	—			194
	Net cash provided by (used in) financing activities	(49,746		)	58,908			(22,481		)	—			(13,319		)
	CASH FLOWS FROM DISCONTINUED OPERATIONS:
	Net cash used in discontinued operations	—			—			(1,018		)	—			(1,018		)
	Effect of exchange rate changes on cash and equivalents	—			—			(1,136		)	—			(1,136		)
	NET DECREASE IN CASH AND EQUIVALENTS	(59,786		)	(5,843		)	(25,064		)	—			(90,693		)
	CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	68,994			25,343			83,793			—			178,130
	CASH AND EQUIVALENTS AT END OF PERIOD	$	9,208		$	19,500		$	58,729		$	—		$	87,437
	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
	For the Nine Months Ended June 30, 2013
		Parent Company			Guarantor Companies			Non-Guarantor Companies			Elimination			Consolidation
	CASH FLOWS FROM OPERATING ACTIVITIES:
	Net income (loss)	$	3,342		$	16,571		$	16,503		$	(33,074	)	$	3,342
	Net cash provided by (used in) operating activities	(67,628		)	23,214			46,968			—			2,554
	CASH FLOWS FROM INVESTING ACTIVITIES:
	Acquisition of property, plant and equipment	(33		)	(40,324		)	(5,529		)	—			(45,886		)
	Intercompany distributions	10,000			(10,000		)	—			—			—
	Proceeds from sale of assets	—			1,172			154			—			1,326
	Net cash provided by (used in) investing activities	9,967			(49,152		)	(5,375		)	—			(44,560		)
	CASH FLOWS FROM FINANCING ACTIVITIES:
	Purchase of shares for treasury	(25,689		)	—			—			—			(25,689		)
	Proceeds from long-term debt	—			303			—			—			303
	Payments of long-term debt	(1,751		)	(772		)	(10,319		)	—			(12,842		)
	Change in short-term borrowings	—			—			2,408			—			2,408
	Financing costs	(759		)	—			—			—			(759		)
	Tax effect from exercise/vesting of equity awards, net	150			—			—			—			150
	Dividend	(4,384		)	—			—			—			(4,384		)
	Other, net	261			14,661			(14,661		)	—			261
	Net cash provided by (used in) financing activities	(32,172		)	14,192			(22,572		)	—			(40,552		)
	CASH FLOWS FROM DISCONTINUED OPERATIONS:
	Net cash used in discontinued operations	—			—			(486		)	—			(486		)
	Effect of exchange rate changes on cash and equivalents	—			—			(506		)	—			(506		)
	NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS	(89,833		)	(11,746		)	18,029			—			(83,550		)
	CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	125,093			34,782			49,779			—			209,654
	CASH AND EQUIVALENTS AT END OF PERIOD	$	35,260		$	23,036		$	67,808		$	—		$	126,104

DESCRIPTION_OF_BUSINESS_AND_BA2

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details)	9 Months Ended
	Jun. 30, 2014
	company
	segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Number of operating segments	3
Number of companies	2

FAIR_VALUE_MEASUREMENTS_Detail

FAIR VALUE MEASUREMENTS (Details) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014
Minimum [Member]	'	'
FAIR VALUE MEASUREMENTS (Details) [Line Items]	'	'
Foreign currency contracts duration	'	'24 days
Maximum [Member]	'	'
FAIR VALUE MEASUREMENTS (Details) [Line Items]	'	'
Foreign currency contracts duration	'	'114 days
Australian Dollar Forward Contracts [Member]	'	'
FAIR VALUE MEASUREMENTS (Details) [Line Items]	'	'
Derivative asset, notional amount	$4,172	$4,172
Australian Dollar Forward Contracts [Member] | Not Designated as Hedging Instrument [Member]	'	'
FAIR VALUE MEASUREMENTS (Details) [Line Items]	'	'
Derivative, average forward exchange rate	1.06	1.06
Canadian Dollar Forward Contracts [Member]	'	'
FAIR VALUE MEASUREMENTS (Details) [Line Items]	'	'
Derivative asset, notional amount	1,750	1,750
Canadian Dollar Forward Contracts [Member] | Not Designated as Hedging Instrument [Member]	'	'
FAIR VALUE MEASUREMENTS (Details) [Line Items]	'	'
Derivative, average forward exchange rate	1.07	1.07
Fair Value, Inputs, Level 1 [Member]	'	'
FAIR VALUE MEASUREMENTS (Details) [Line Items]	'	'
Trading securities	11,160	11,160
Fair Value, Inputs, Level 2 [Member]	'	'
FAIR VALUE MEASUREMENTS (Details) [Line Items]	'	'
Insurance contracts fair value	3,594	3,594
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments	192	125
Convertible Notes 2017 [Member]	'	'
FAIR VALUE MEASUREMENTS (Details) [Line Items]	'	'
Debt instrument, interest rate, effective percentage	4.00%	4.00%
Convertible Notes 2017 [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
FAIR VALUE MEASUREMENTS (Details) [Line Items]	'	'
Convertible debt, fair value disclosures	113,400	113,400
Senior Notes 2022 [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
FAIR VALUE MEASUREMENTS (Details) [Line Items]	'	'
Convertible debt, fair value disclosures	$594,000	$594,000

ACQUISITIONS_Details

ACQUISITIONS (Details) (USD $)	9 Months Ended			0 Months Ended		3 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	21-May-14	21-May-14	Dec. 31, 2013
			Guarantor Companies [Member]	Cyclone [Member]	Cyclone [Member]	Northcote Pottery [Member]
						Guarantor Companies [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'
Business combination, consideration transferred	'	'	'	$40,000	'	'
Business combination, working capital adjustment	'	'	'	4,000	'	'
Payments to acquire businesses, net of cash acquired	62,306	0	1,000	'	'	22,000
Annualized revenues expected to be recognized	'	'	'	65,000	'	28,000
Business acquisition, transaction costs	'	'	'	'	$1,600	$798

ACQUISITIONS_Details_Summary_o

ACQUISITIONS (Details) - Summary of Fair Values of Assets Acquired (USD $)	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	21-May-14	Dec. 31, 2013
In Thousands, unless otherwise specified			Recent Acquirees [Member]	Cyclone [Member]	Northcote [Member]
Business Acquisition [Line Items]	'	'	'	'	'
Current Assets, net of cash acquired	'	'	$31,857	$23,936	$7,921
PP&E	'	'	1,867	491	1,376
Goodwill	381,315	357,730	21,689	10,072	11,617
Amortizable intangible assets	'	'	15,867	9,844	6,023
Indefinite life intangible assets	'	'	3,560	1,874	1,686
Total assets acquired	'	'	74,840	46,217	28,623
Total liabilities assumed	'	'	-13,534	-6,692	-6,842
Net assets acquired	'	'	$61,306	$39,525	$21,781

ACQUISITIONS_Details_Summary_o1

ACQUISITIONS (Details) - Summary of Goodwill and Intangible Asset Classifications (USD $)

Jun. 30, 2014

Sep. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

21-May-14

21-May-14

21-May-14

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

In Thousands, unless otherwise specified

Customer relationships [Member]

Recent Acquirees [Member]

Recent Acquirees [Member]

Recent Acquirees [Member]

Cyclone [Member]

Cyclone [Member]

Cyclone [Member]

Northcote [Member]

Northcote [Member]

Northcote [Member]

Customer relationships [Member]

Tradenames [Member]

Customer relationships [Member]

Tradenames [Member]

Customer relationships [Member]

Tradenames [Member]

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill

$381,315

$357,730

'

$21,689

'

'

$10,072

'

'

$11,617

'

'

Indefinite life intangible assets

'

'

'

3,560

'

3,560

1,874

'

1,874

1,686

'

1,686

Amortizable intangible assets

'

'

'

15,867

15,867

'

9,844

9,844

'

6,023

6,023

'

Amortization Period (Years)

'

'

'25 years

'

'

'

'

'

'

'

'

'

Total Goodwill and Intangibles

'

'

'

$41,116

'

'

$21,790

'

'

$19,326

'

'

INVENTORIES_Details_Summary_of

INVENTORIES (Details) - Summary of Inventories Stated at Lower Cost (USD $)	Jun. 30, 2014	Sep. 30, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw materials and supplies	$71,533	$65,560
Work in process	69,884	63,930
Finished goods	137,045	100,630
Total	$278,462	$230,120

PROPERTY_PLANT_AND_EQUIPMENT_D

PROPERTY, PLANT AND EQUIPMENT (Details) - Summary of Property Plant and Equipment (USD $)	Jun. 30, 2014	Sep. 30, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property Plant And Equipment Gross	$885,867	$827,883
Accumulated depreciation and amortization	-520,491	-474,290
Total	365,376	353,593
Land, building and building improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property Plant And Equipment Gross	131,270	130,905
Machinery and equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property Plant And Equipment Gross	715,805	661,094
Leasehold improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property Plant And Equipment Gross	$38,792	$35,884

PROPERTY_PLANT_AND_EQUIPMENT_D1

PROPERTY, PLANT AND EQUIPMENT (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Property, Plant and Equipment [Line Items]	'	'	'	'
Depreciation and amortization expense	$14,766	$15,781	$44,163	$46,846
Selling, general and administrative expense [Member]	'	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'	'
Depreciation and amortization expense	$2,507	$3,128	$7,743	$9,402

GOODWILL_AND_OTHER_INTANGIBLES2

GOODWILL AND OTHER INTANGIBLES (Details) - Summary of Changes in Carrying Value of Goodwill (USD $)	9 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2014
		Home & Building Products [Member]	Telephonics [Member]	Telephonics [Member]	Plastics [Member]
Goodwill [Roll Forward]	'	'	'	'	'
Goodwill	$357,730	$269,802	$18,545	$18,545	$69,383
Goodwill from 2014 acquisitions	21,689	21,689	'	'	'
Other adjustments including currency translations	1,896	948	'	'	948
Goodwill	$381,315	$292,439	$18,545	$18,545	$70,331

GOODWILL_AND_OTHER_INTANGIBLES3

GOODWILL AND OTHER INTANGIBLES (Details) - Summary of Gross Carrying Value and Accumulated Amortization of Intangible Assets (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013
GOODWILL AND OTHER INTANGIBLES (Details) - Summary of Gross Carrying Value and Accumulated Amortization of Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$189,860	$173,789
Accumulated Amortization	37,833	31,965
Trademarks	83,065	79,567
Total intangible assets	272,925	253,356
Customer Relationships [Member]	'	'
GOODWILL AND OTHER INTANGIBLES (Details) - Summary of Gross Carrying Value and Accumulated Amortization of Intangible Assets [Line Items]	'	'
Gross Carrying Amount	183,152	166,985
Accumulated Amortization	34,543	29,049
Average Life (Years)	'25 years	'
Unpatented Technology [Member]	'	'
GOODWILL AND OTHER INTANGIBLES (Details) - Summary of Gross Carrying Value and Accumulated Amortization of Intangible Assets [Line Items]	'	'
Gross Carrying Amount	6,708	6,804
Accumulated Amortization	$3,290	$2,916
Average Life (Years)	'13 years	'

GOODWILL_AND_OTHER_INTANGIBLES4

GOODWILL AND OTHER INTANGIBLES (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'	'	'	'
Amortization of Intangible Assets	$2,028	$1,969	$5,864	$5,941

INCOME_TAXES_Details

INCOME TAXES (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Effective income tax rate reconciliation, provision (benefit) percent	-12.20%	54.00%	-38.00%	53.60%
Effective income tax rate reconciliation, change in enacted tax rate, amount	$1,860	$1,495	$1,540	$1,859
Effective income tax rate reconciliation, nondeductible provision (benefit) percent	27.00%	73.10%	-26.30%	79.40%

LONGTERM_DEBT_Details_Summary_

LONG-TERM DEBT (Details) - Summary of Long-Term Debt (USD $)	Jun. 30, 2014		Sep. 30, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'		'
Outstanding Balance	$819,598		$702,501
less: Current portion, Outstanding Balance	-11,886		-10,768
Long-term debt, Outstanding Balance	807,712		691,733
Original Issuer Discount	-10,532		-13,246
less: Current portion, Original Issuer Discount	0		0
Long-term debt, Original Issuer Discount	-10,532		-13,246
Balance Sheet	809,066		689,255
less: Current portion	-11,886		-10,768
Long-term debt	797,180		678,487
Capitalized Fees & Expenses	14,045		11,674
Senior notes due 2018 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	0	[1]	550,000	[1]
Original Issuer Discount	0	[1]	0	[1]
Balance Sheet	0	[1]	550,000	[1]
Capitalized Fees & Expenses	0	[1]	7,328	[1]
Coupon Interest Rate	'		7.10%	[1]
Senior notes due 2022 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	600,000	[1]	0	[1]
Original Issuer Discount	0		0	[1]
Balance Sheet	600,000	[1]	0	[1]
Capitalized Fees & Expenses	9,529	[1]	0	[1]
Coupon Interest Rate	5.25%	[1]	'
Revolver due 2019 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	25,000	[1]	0	[1]
Original Issuer Discount	0	[1]	0	[1]
Balance Sheet	25,000	[1]	0	[1]
Capitalized Fees & Expenses	2,122	[1]	2,425	[1]
Convert. debt due 2017 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	100,000	[2]	100,000	[2]
Original Issuer Discount	-10,532	[2]	-13,246	[2]
Balance Sheet	89,468	[2]	86,754	[2]
Capitalized Fees & Expenses	1,145	[2]	1,478	[2]
Coupon Interest Rate	4.00%	[2]	4.00%	[2]
Real estate mortgages [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	16,603	[3]	13,212	[3]
Original Issuer Discount	0	[3]	0
Balance Sheet	16,603	[3]	13,212	[3]
Capitalized Fees & Expenses	612	[3]	185	[3]
ESOP Loans [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	29,583	[4]	21,098	[4]
Original Issuer Discount	0	[4]	0	[4]
Balance Sheet	29,583	[4]	21,098	[4]
Capitalized Fees & Expenses	233	[4]	24	[4]
Capital lease - real estate [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	8,798	[5]	9,529	[5]
Original Issuer Discount	0	[5]	0	[5]
Balance Sheet	'		9,529	[5]
Capitalized Fees & Expenses	188	[5]	207	[5]
Coupon Interest Rate	5.00%	[5]	5.00%	[5]
Non U.S. lines of credit [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	7,754	[6]	4,606	[6]
Original Issuer Discount	0	[6]	0	[6]
Balance Sheet	7,754	[6]	4,606	[6]
Capitalized Fees & Expenses	0	[6]	0	[6]
Non U.S. term loans [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	30,612	[6]	3,115	[6]
Original Issuer Discount	0	[6]	0	[6]
Balance Sheet	30,612	[6]	3,115	[6]
Capitalized Fees & Expenses	189	[6]	27	[6]
Other long term debt [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	1,248	[7]	941	[7]
Original Issuer Discount	0	[7]	0	[7]
Balance Sheet	1,248	[7]	941	[7]
Capitalized Fees & Expenses	$27	[7]	$0	[7]
[1]	On February 27, 2014, in an unregistered offering through a private placement under Rule 144A, Griffon issued, at par, $600,000 of 5.25% Senior Notes due 2022 (“Senior Notes”); interest is payable semi-annually on March 1 and September 1, starting September 1, 2014. Proceeds from the Senior Notes were used to redeem $550,000 of 7.125% senior notes due 2018, to pay a tender offer premium of $31,530 and to make interest payments of $16,716, with the balance used to pay a portion of the transaction fees and expenses. The Senior Notes are senior unsecured obligations of Griffon guaranteed by certain domestic subsidiaries, and subject to certain covenants, limitations and restrictions. On June 18, 2014, Griffon exchanged all of the Senior Notes for substantially identical Senior Notes registered under the Securities Act of 1933 via an exchange offer.In connection with these transactions, Griffon capitalized $9,950 of underwriting fees and other expenses incurred related to issuance of the Senior Notes, which will amortize over the term of such notes. Griffon recognized a loss on the early extinguishment of debt on the 7.125% senior notes aggregating $38,890, comprised of the $31,530 tender offer premium, the write-off of $6,574 of remaining deferred financing fees and $786 of prepaid interest on defeased notes. On February 14, 2014, Griffon amended its $225,000 Revolving Credit Facility (“Credit Agreement”) to extend its maturity date from March 28, 2018 to March 28, 2019, and to revise certain financial maintenance and negative covenants to improve Griffon's financial and operating flexibility. The facility includes a letter of credit sub-facility with a limit of $60,000, a multi-currency sub-facility of $50,000 and a swing line sub-facility with a limit of $30,000. Borrowings under the Credit Agreement may be repaid and re-borrowed at any time, subject to final maturity of the facility or the occurrence of a default or an event of default under the Credit Agreement. Interest is payable on borrowings at either a LIBOR or base rate benchmark rate, in each case without a floor, plus an applicable margin, which adjusts based on financial performance. The current margins are 1.25% for base rate loans and 2.25% for LIBOR loans. The Credit Agreement has certain financial maintenance tests including a maximum total leverage ratio, a maximum senior secured leverage ratio and a minimum interest coverage ratio as well as customary affirmative and negative covenants and events of default. The Credit Agreement also includes certain restrictions, such as limitations on the ability of Griffon to incur indebtedness and liens and to make restricted payments and investments. Borrowings under the Credit Agreement are guaranteed by Griffon’s material domestic subsidiaries and are secured, on a first priority basis, by substantially all assets of the Company and the guarantors and a pledge of not greater than 65% of the equity interest in each of Griffon’s material, first-tier foreign subsidiaries (except that a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the debt under the ESOP credit agreement ranks pari passu with the lien granted on such assets under the Credit Agreement; see footnote (d) below). At June 30, 2014, outstanding borrowings and standby letters of credit were $25,000 and $20,365, respectively; $179,635 was available for borrowing at that date.
[2]	On December 21, 2009, Griffon issued $100,000 principal of 4% convertible subordinated notes due 2017 (the “2017 Notes”). The current conversion rate of the 2017 Notes is 68.6238 shares of Griffon’s common stock per $1,000 principal amount of notes, corresponding to a conversion price of $14.53 per share. When a cash dividend is declared that would result in an adjustment to the conversion ratio of less than 1%, any adjustment to the conversion ratio is deferred until the first to occur of (i) actual conversion; (ii) the 42nd trading day prior to maturity of the notes; and (iii) such time as the cumulative adjustment equals or exceeds 1%. As of June 30, 2014, aggregate dividends since the last conversion price adjustment of $0.03 per share would have resulted in an adjustment to the conversion ratio of approximately .27%. At both June 30, 2014 and 2013, the 2017 Notes had a capital in excess of par component, net of tax, of $15,720.
[3]	On October 21, 2013, Griffon refinanced two properties’ real estate mortgages to secure loans totaling $17,175. The loans mature in October 2018, are collateralized by the related properties and are guaranteed by Griffon. The loans bear interest at a rate of LIBOR plus 2.75%. At June 30, 2014, $16,603 was outstanding.
[4]	In December 2013, Griffon’s Employee Stock Ownership Plan (“ESOP”) entered into a credit agreement which refinanced the two existing ESOP loans into one new Term Loan in the amount of $21,098. The agreement also provided a Line Note with $10,000 available to purchase shares of Griffon common stock in the open market through September 29, 2014. As of June 30, 2014, 749,977 shares of Griffon common stock, for a total of $10,000, were purchased with proceeds from the Line Note. In March 2014, the Line Note was combined with the Term Loan to form one new term loan. The loan bears interest at a) LIBOR plus 2.25% or b) the lender’s prime rate, at Griffon’s option. The loan requires quarterly principal payments of $505 through September 30, 2014 and $419 per quarter thereafter, with a balloon payment of approximately $22,400 due at maturity in December 2018. The loan is secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment. As of June 30, 2014, $29,583 was outstanding.In July 2014, Griffon's ESOP entered into an amendment to the existing agreement which provides for an additional $10,000 Line Note available to purchase shares in the open market. The new Line Note will bear interest at a) LIBOR plus 2.75% or b) the lender’s prime rate, at Griffon’s option, through its expiration date on June 30, 2015. Upon expiration or at an earlier date, at Griffon’s option, the new Line Note will be combined with the Term Loan and require quarterly principal payments based on the remaining amortization schedule at a weighted average interest rate of the combined loans, with a balloon payment due at the final maturity date of December 31, 2018, based on the new amortization schedule. The new Line Note and the Term Loan are secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment.
[5]	In October 2006, CBP entered into a capital lease totaling $14,290 for real estate in Troy, Ohio. The lease matures in 2022, bears interest at a fixed rate of 5.0%, is secured by a mortgage on the real estate and is guaranteed by Griffon. At June 30, 2014, $8,798 was outstanding.
[6]	In November 2010, Clopay Europe GmbH (“Clopay Europe”) entered into a €10,000 revolving credit facility and a €20,000 term loan. The term loan was paid off in December 2013 and the revolver had borrowings of $4,093 at June 30, 2014. The revolving facility matures in November 2014, but is renewable upon mutual agreement with the bank. The revolving credit facility accrues interest at EURIBOR plus 2.20% per annum (2.41% at June 30, 2014). Clopay Europe is required to maintain a certain minimum equity to assets ratio and keep leverage below a certain level, defined as the ratio of total debt to EBITDA.Clopay do Brazil maintains lines of credit of approximately $5,700. Interest on borrowings accrues at a rate of Brazilian CDI plus 6.0% (16.80% at June 30, 2014). At June 30, 2014 there was $3,660 borrowed under the lines. Clopay Plastic Products Company, Inc. guarantees the loan and lines.In November 2012, Garant G.P. (“Garant”) entered into a CAD $15,000 revolving credit facility. The facility accrues interest at LIBOR (USD) or the Bankers Acceptance Rate (CDN) plus 1.3% per annum (1.46% LIBOR USD and 2.51% Bankers Acceptance Rate CDN as of June 30, 2014). The revolving facility matures in November 2015. Garant is required to maintain a certain minimum equity. At June 30, 2014, there were no borrowings under the revolving credit facility with CAD $15,000 available for borrowing.In December 2013 and May 2014, Northcote Holdings Pty Ltd entered into two term loans in the outstanding amounts of AUD $12,500 and AUD $20,000, respectively. The AUD $12,500 and AUD $20,000 term loans are unsecured and require quarterly interest payments, with quarterly principal payments of $625 beginning in August 2015 on the AUD $20,000 term loan. Remaining principal is due at maturity in December 2016 and May 2017, respectively. The loans accrue interest at Bank Bill Swap Bid Rate “BBSY” plus 2.8% per annum (5.5% at June 30, 2014 for each loan). As of June 30, 2014, Griffon had an outstanding combined balance of $30,612 on the term loans. Subsidiaries of Northcote Holdings Pty Ltd also maintain two lines of credit of AUD $3,000 and AUD $5,000 which accrue interest at BBSY plus 2.25% per annum (5.00% at June 30, 2014) and 2.50% per annum (5.25% at June 30, 2014), respectively. At June 30, 2014, there were no outstanding borrowings under the lines. Griffon Corporation guarantees the term loans and the AUD $3,000 line of credit; the assets of a subsidiary of Northcote Holdings Pty Ltd secures the AUD $5,000 line of credit.
[7]	Other long-term debt primarily consists of capital leases.

LONGTERM_DEBT_Details_Summary_1

LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Effective Interest Rate	'		'		6.00%		'
Cash Interest	$10,060		$11,730		$32,395		$34,795
Amort. Debt Discount	921		846		2,713		2,491
Amort. Deferred Cost & Other Fees	680		703		2,076		2,160
Total Interest Expense	11,661		13,279		37,184		39,446
Senior notes due 2018 [Member]	'		'		'		'
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Effective Interest Rate	'		7.40%	[1]	7.40%	[1]	7.40%	[1]
Cash Interest	0	[1]	9,797	[1]	15,930	[1]	29,391	[1]
Amort. Debt Discount	0	[1]	0	[1]	0	[1]	0	[1]
Amort. Deferred Cost & Other Fees	0	[1]	406	[1]	667	[1]	1,217	[1]
Total Interest Expense	0	[1]	10,203	[1]	16,597	[1]	30,608	[1]
Senior notes due 2022 [Member]	'		'		'		'
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Effective Interest Rate	5.50%	[1]	'		5.50%	[1]	'
Cash Interest	7,875	[1]	0	[1]	10,675	[1]	0	[1]
Amort. Debt Discount	0	[1]	0	[1]	0	[1]	0	[1]
Amort. Deferred Cost & Other Fees	310	[1]	0	[1]	421	[1]	0	[1]
Total Interest Expense	8,185	[1]	0	[1]	11,096	[1]	0	[1]
Revolver due 2019 [Member]	'		'		'		'
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Cash Interest	309	[1]	179	[1]	782	[1]	603	[1]
Amort. Debt Discount	0	[1]	0	[1]	0	[1]	0	[1]
Amort. Deferred Cost & Other Fees	144	[1]	131	[1]	422	[1]	444	[1]
Total Interest Expense	453	[1]	310	[1]	1,204	[1]	1,047	[1]
Convert. debt due 2017 [Member]	'		'		'		'
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Effective Interest Rate	9.10%	[2]	9.10%	[2]	9.10%	[2]	9.20%	[2]
Cash Interest	1,000	[2]	1,000	[2]	3,000	[2]	3,000	[2]
Amort. Debt Discount	921	[2]	846	[2]	2,713	[2]	2,491	[2]
Amort. Deferred Cost & Other Fees	112	[2]	110	[2]	333	[2]	332	[2]
Total Interest Expense	2,033	[2]	1,956	[2]	6,046	[2]	5,823	[2]
Real estate mortgages [Member]	'		'		'		'
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Effective Interest Rate	3.80%	[3]	4.90%	[3]	4.00%	[3]	4.90%	[3]
Cash Interest	124	[3]	133	[3]	376	[3]	407	[3]
Amort. Debt Discount	0	[3]	0	[3]	0	[3]	0	[3]
Amort. Deferred Cost & Other Fees	35	[3]	22	[3]	108	[3]	65	[3]
Total Interest Expense	159	[3]	155	[3]	484	[3]	472	[3]
ESOP Loans [Member]	'		'		'		'
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Effective Interest Rate	2.90%	[4]	2.80%	[4]	3.20%	[4]	2.90%	[4]
Cash Interest	192	[4]	151	[4]	524	[4]	476	[4]
Amort. Debt Discount	0	[4]	0	[4]	0	[4]	0	[4]
Amort. Deferred Cost & Other Fees	25	[4]	2	[4]	32	[4]	6	[4]
Total Interest Expense	217	[4]	153	[4]	556	[4]	482	[4]
Capital lease - real estate [Member]	'		'		'		'
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Effective Interest Rate	5.30%	[5]	5.30%	[5]	5.40%	[5]	5.30%	[5]
Cash Interest	112	[5]	125	[5]	345	[5]	381	[5]
Amort. Debt Discount	0	[5]	0	[5]	0	[5]	0	[5]
Amort. Deferred Cost & Other Fees	5	[5]	6	[5]	19	[5]	19	[5]
Total Interest Expense	117	[5]	131	[5]	364	[5]	400	[5]
Non U.S. lines of credit [Member]	'		'		'		'
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Cash Interest	307	[6]	155	[6]	724	[6]	415	[6]
Amort. Debt Discount	0	[6]	0	[6]	0	[6]	0	[6]
Amort. Deferred Cost & Other Fees	27	[6]	0	[6]	27	[6]	0	[6]
Total Interest Expense	334	[6]	155	[6]	751	[6]	415	[6]
Non U.S. term loans [Member]	'		'		'		'
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Cash Interest	273	[6]	109	[6]	426	[6]	415	[6]
Amort. Debt Discount	0	[6]	0	[6]	0	[6]	0	[6]
Amort. Deferred Cost & Other Fees	13	[6]	26	[6]	17	[6]	77	[6]
Total Interest Expense	286	[6]	135	[6]	443	[6]	492	[6]
Other long term debt [Member]	'		'		'		'
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Cash Interest	6	[7]	272	[7]	17	[7]	523	[7]
Amort. Debt Discount	0	[7]	0	[7]	0	[7]	0	[7]
Amort. Deferred Cost & Other Fees	9	[7]	0	[7]	30	[7]	0	[7]
Total Interest Expense	15	[7]	272	[7]	47	[7]	523	[7]
Capitalized interest [Member]	'		'		'		'
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]	'		'		'		'
Cash Interest	-138		-191		-404		-816
Amort. Debt Discount	0		0		0		0
Amort. Deferred Cost & Other Fees	0		0		0		0
Total Interest Expense	($138)		($191)		($404)		($816)
[1]	On February 27, 2014, in an unregistered offering through a private placement under Rule 144A, Griffon issued, at par, $600,000 of 5.25% Senior Notes due 2022 (“Senior Notes”); interest is payable semi-annually on March 1 and September 1, starting September 1, 2014. Proceeds from the Senior Notes were used to redeem $550,000 of 7.125% senior notes due 2018, to pay a tender offer premium of $31,530 and to make interest payments of $16,716, with the balance used to pay a portion of the transaction fees and expenses. The Senior Notes are senior unsecured obligations of Griffon guaranteed by certain domestic subsidiaries, and subject to certain covenants, limitations and restrictions. On June 18, 2014, Griffon exchanged all of the Senior Notes for substantially identical Senior Notes registered under the Securities Act of 1933 via an exchange offer.In connection with these transactions, Griffon capitalized $9,950 of underwriting fees and other expenses incurred related to issuance of the Senior Notes, which will amortize over the term of such notes. Griffon recognized a loss on the early extinguishment of debt on the 7.125% senior notes aggregating $38,890, comprised of the $31,530 tender offer premium, the write-off of $6,574 of remaining deferred financing fees and $786 of prepaid interest on defeased notes. On February 14, 2014, Griffon amended its $225,000 Revolving Credit Facility (“Credit Agreement”) to extend its maturity date from March 28, 2018 to March 28, 2019, and to revise certain financial maintenance and negative covenants to improve Griffon's financial and operating flexibility. The facility includes a letter of credit sub-facility with a limit of $60,000, a multi-currency sub-facility of $50,000 and a swing line sub-facility with a limit of $30,000. Borrowings under the Credit Agreement may be repaid and re-borrowed at any time, subject to final maturity of the facility or the occurrence of a default or an event of default under the Credit Agreement. Interest is payable on borrowings at either a LIBOR or base rate benchmark rate, in each case without a floor, plus an applicable margin, which adjusts based on financial performance. The current margins are 1.25% for base rate loans and 2.25% for LIBOR loans. The Credit Agreement has certain financial maintenance tests including a maximum total leverage ratio, a maximum senior secured leverage ratio and a minimum interest coverage ratio as well as customary affirmative and negative covenants and events of default. The Credit Agreement also includes certain restrictions, such as limitations on the ability of Griffon to incur indebtedness and liens and to make restricted payments and investments. Borrowings under the Credit Agreement are guaranteed by Griffon’s material domestic subsidiaries and are secured, on a first priority basis, by substantially all assets of the Company and the guarantors and a pledge of not greater than 65% of the equity interest in each of Griffon’s material, first-tier foreign subsidiaries (except that a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the debt under the ESOP credit agreement ranks pari passu with the lien granted on such assets under the Credit Agreement; see footnote (d) below). At June 30, 2014, outstanding borrowings and standby letters of credit were $25,000 and $20,365, respectively; $179,635 was available for borrowing at that date.
[2]	On December 21, 2009, Griffon issued $100,000 principal of 4% convertible subordinated notes due 2017 (the “2017 Notes”). The current conversion rate of the 2017 Notes is 68.6238 shares of Griffon’s common stock per $1,000 principal amount of notes, corresponding to a conversion price of $14.53 per share. When a cash dividend is declared that would result in an adjustment to the conversion ratio of less than 1%, any adjustment to the conversion ratio is deferred until the first to occur of (i) actual conversion; (ii) the 42nd trading day prior to maturity of the notes; and (iii) such time as the cumulative adjustment equals or exceeds 1%. As of June 30, 2014, aggregate dividends since the last conversion price adjustment of $0.03 per share would have resulted in an adjustment to the conversion ratio of approximately .27%. At both June 30, 2014 and 2013, the 2017 Notes had a capital in excess of par component, net of tax, of $15,720.
[3]	On October 21, 2013, Griffon refinanced two properties’ real estate mortgages to secure loans totaling $17,175. The loans mature in October 2018, are collateralized by the related properties and are guaranteed by Griffon. The loans bear interest at a rate of LIBOR plus 2.75%. At June 30, 2014, $16,603 was outstanding.
[4]	In December 2013, Griffon’s Employee Stock Ownership Plan (“ESOP”) entered into a credit agreement which refinanced the two existing ESOP loans into one new Term Loan in the amount of $21,098. The agreement also provided a Line Note with $10,000 available to purchase shares of Griffon common stock in the open market through September 29, 2014. As of June 30, 2014, 749,977 shares of Griffon common stock, for a total of $10,000, were purchased with proceeds from the Line Note. In March 2014, the Line Note was combined with the Term Loan to form one new term loan. The loan bears interest at a) LIBOR plus 2.25% or b) the lender’s prime rate, at Griffon’s option. The loan requires quarterly principal payments of $505 through September 30, 2014 and $419 per quarter thereafter, with a balloon payment of approximately $22,400 due at maturity in December 2018. The loan is secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment. As of June 30, 2014, $29,583 was outstanding.In July 2014, Griffon's ESOP entered into an amendment to the existing agreement which provides for an additional $10,000 Line Note available to purchase shares in the open market. The new Line Note will bear interest at a) LIBOR plus 2.75% or b) the lender’s prime rate, at Griffon’s option, through its expiration date on June 30, 2015. Upon expiration or at an earlier date, at Griffon’s option, the new Line Note will be combined with the Term Loan and require quarterly principal payments based on the remaining amortization schedule at a weighted average interest rate of the combined loans, with a balloon payment due at the final maturity date of December 31, 2018, based on the new amortization schedule. The new Line Note and the Term Loan are secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment.
[5]	In October 2006, CBP entered into a capital lease totaling $14,290 for real estate in Troy, Ohio. The lease matures in 2022, bears interest at a fixed rate of 5.0%, is secured by a mortgage on the real estate and is guaranteed by Griffon. At June 30, 2014, $8,798 was outstanding.
[6]	In November 2010, Clopay Europe GmbH (“Clopay Europe”) entered into a €10,000 revolving credit facility and a €20,000 term loan. The term loan was paid off in December 2013 and the revolver had borrowings of $4,093 at June 30, 2014. The revolving facility matures in November 2014, but is renewable upon mutual agreement with the bank. The revolving credit facility accrues interest at EURIBOR plus 2.20% per annum (2.41% at June 30, 2014). Clopay Europe is required to maintain a certain minimum equity to assets ratio and keep leverage below a certain level, defined as the ratio of total debt to EBITDA.Clopay do Brazil maintains lines of credit of approximately $5,700. Interest on borrowings accrues at a rate of Brazilian CDI plus 6.0% (16.80% at June 30, 2014). At June 30, 2014 there was $3,660 borrowed under the lines. Clopay Plastic Products Company, Inc. guarantees the loan and lines.In November 2012, Garant G.P. (“Garant”) entered into a CAD $15,000 revolving credit facility. The facility accrues interest at LIBOR (USD) or the Bankers Acceptance Rate (CDN) plus 1.3% per annum (1.46% LIBOR USD and 2.51% Bankers Acceptance Rate CDN as of June 30, 2014). The revolving facility matures in November 2015. Garant is required to maintain a certain minimum equity. At June 30, 2014, there were no borrowings under the revolving credit facility with CAD $15,000 available for borrowing.In December 2013 and May 2014, Northcote Holdings Pty Ltd entered into two term loans in the outstanding amounts of AUD $12,500 and AUD $20,000, respectively. The AUD $12,500 and AUD $20,000 term loans are unsecured and require quarterly interest payments, with quarterly principal payments of $625 beginning in August 2015 on the AUD $20,000 term loan. Remaining principal is due at maturity in December 2016 and May 2017, respectively. The loans accrue interest at Bank Bill Swap Bid Rate “BBSY” plus 2.8% per annum (5.5% at June 30, 2014 for each loan). As of June 30, 2014, Griffon had an outstanding combined balance of $30,612 on the term loans. Subsidiaries of Northcote Holdings Pty Ltd also maintain two lines of credit of AUD $3,000 and AUD $5,000 which accrue interest at BBSY plus 2.25% per annum (5.00% at June 30, 2014) and 2.50% per annum (5.25% at June 30, 2014), respectively. At June 30, 2014, there were no outstanding borrowings under the lines. Griffon Corporation guarantees the term loans and the AUD $3,000 line of credit; the assets of a subsidiary of Northcote Holdings Pty Ltd secures the AUD $5,000 line of credit.
[7]	Other long-term debt primarily consists of capital leases.

LONGTERM_DEBT_Details

LONG-TERM DEBT (Details)

1 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

12 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2012

Jun. 30, 2014

Jun. 30, 2013

Sep. 30, 2011

Sep. 30, 2007

Oct. 21, 2013

Sep. 30, 2013

Jun. 30, 2014

31-May-14

Jun. 30, 2014

Sep. 30, 2010

Dec. 21, 2009

Jun. 30, 2014

Jun. 30, 2014

Feb. 14, 2014

Feb. 14, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Feb. 27, 2014

Sep. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Sep. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Sep. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Sep. 30, 2013

Jul. 31, 2014

Jul. 31, 2014

Dec. 31, 2013

Jun. 30, 2014

Sep. 30, 2011

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

31-May-14

31-May-14

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Sep. 30, 2007

Sep. 30, 2013

Sep. 30, 2011

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Sep. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2012

Jun. 30, 2014

Jun. 30, 2013

Sep. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

31-May-14

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Feb. 14, 2014

Sep. 30, 2013

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Northcote Holdings Pty. Ltd [Member]

Northcote Holdings Pty. Ltd [Member]

Convert. debt due 2017 [Member]

Convert. debt due 2017 [Member]

Convert. debt due 2017 [Member]

LIBOR Rate [Member]

Revolver due 2019 [Member]

Revolver due 2019 [Member]

Revolver due 2019 [Member]

Revolver due 2019 [Member]

Revolver due 2019 [Member]

Senior notes due 2022 [Member]

Senior notes due 2022 [Member]

Senior notes due 2022 [Member]

Senior notes due 2022 [Member]

Senior notes due 2022 [Member]

Senior notes due 2022 [Member]

Senior notes due 2018 [Member]

Senior notes due 2018 [Member]

Senior notes due 2018 [Member]

Senior notes due 2018 [Member]

Senior notes due 2018 [Member]

Senior Notes [Member]

Real estate mortgages [Member]

Real estate mortgages [Member]

Real estate mortgages [Member]

Real estate mortgages [Member]

Real estate mortgages [Member]

ESOP Loans [Member]

ESOP Loans [Member]

ESOP Loans [Member]

ESOP Loans [Member]

ESOP Loans [Member]

ESOP Loan July 2014 [Member]

ESOP Loan July 2014 [Member]

Term Loan December 2013 and May 2014 [Member]

Term Loan December 2013 and May 2014 [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan May 2014 [Member]

Term Loan May 2014 [Member]

Capital lease - real estate [Member]

Capital lease - real estate [Member]

Capital lease - real estate [Member]

Capital lease - real estate [Member]

Capital lease - real estate [Member]

Capital lease - real estate [Member]

Revolver Due 2013 [Member]

Non U.S. term loans [Member]

Non U.S. term loans [Member]

Non U.S. term loans [Member]

Non U.S. term loans [Member]

Non U.S. term loans [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Non U.S. lines of credit [Member]

Revolver due 2019 [Member]

Revolver due 2019 [Member]

Revolver due 2019 [Member]

Revolver due 2019 [Member]

Revolver due 2019 [Member]

Revolver due 2019 [Member]

loan

property

USD ($)

loan

USD ($)

USD ($)

USD ($)

Letter Of Credit Subfacility [Member]

Multicurrency Subfacility [Member]

Swingline Subfacility [Member]

Margin Rate [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Subsequent Event [Member]

Subsequent Event [Member]

Northcote Holdings Pty. Ltd [Member]

Northcote Holdings Pty. Ltd [Member]

EUR (€)

Northcote Holdings Pty. Ltd [Member]

Brazilian CDI [Member]

Northcote Holdings Pty. Ltd [Member]

Northcote Holdings Pty. Ltd [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

CAD

USD ($)

CAD

USD ($)

USD ($)

USD ($)

Line of Credit One [Member]

Line of Credit One [Member]

Line of Credit Two [Member]

Line of Credit Two [Member]

LIBOR Rate [Member]

Bankers Acceptance Rate [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

line_of_credit

USD ($)

USD ($)

USD ($)

USD ($)

London Interbank Offered Rate (LIBOR) [Member]

USD ($)

AUD

USD ($)

AUD

Northcote Holdings Pty. Ltd [Member]

Northcote Holdings Pty. Ltd [Member]

Northcote Holdings Pty. Ltd [Member]

Northcote Holdings Pty. Ltd [Member]

USD ($)

USD ($)

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Face amount

$21,098,000

'

'

'

'

'

'

'

$17,175,000

'

'

'

'

'

$100,000,000

'

'

'

'

'

'

'

'

'

'

$600,000,000

'

$550,000,000

'

$550,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

12,500,000

'

'

20,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, interest rate, stated percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.00%

'

'

'

'

'

'

'

'

'

'

5.25%

'

7.13%

'

7.13%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payment of tender offer premium

'

'

'

'

31,530,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest paid

'

10,060,000

11,730,000

'

32,395,000

34,795,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,875,000

[1]

0

[1]

10,675,000

[1]

0

[1]

'

'

0

[1]

9,797,000

[1]

15,930,000

[1]

29,391,000

[1]

'

16,716,000

124,000

[2]

133,000

[2]

376,000

[2]

407,000

[2]

'

192,000

[3]

151,000

[3]

524,000

[3]

476,000

[3]

'

'

'

'

'

'

'

'

'

'

'

112,000

[4]

125,000

[4]

345,000

[4]

381,000

[4]

'

'

'

273,000

[5]

109,000

[5]

426,000

[5]

415,000

[5]

'

307,000

[5]

'

155,000

[5]

'

724,000

[5]

415,000

[5]

'

'

'

'

'

'

'

309,000

[1]

179,000

[1]

782,000

[1]

603,000

[1]

'

'

Underwriting fees and other expense capitalized

'

'

'

'

9,950,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gains (losses) on extinguishment of debt

'

0

0

'

-38,890,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-38,890,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Write off of deferred debt issuance cost

'

'

'

'

6,574,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Prepaid interest on defeased note on extinguishment of debt

'

'

'

'

786,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility, current borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

60,000,000

50,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,000,000

'

5,000,000

'

'

'

'

'

'

225,000,000

'

Proceeds from lines of credit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

30,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility, interest rate during period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.25%

'

'

'

'

1.25%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum percentage of equity interest of subsidiaries borrowings guaranteed

'

'

'

'

65.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility, amount outstanding

'

20,365,000

'

'

20,365,000

'

4,093,000

'

'

'

0

'

'

'

'

'

25,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

30,612,000

'

'

'

'

'

'

'

'

'

'

'

'

'

3,660,000

'

3,660,000

'

'

0

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility, remaining borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

179,635,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, convertible, conversion ratio

'

'

'

'

'

'

'

'

'

'

'

'

68.6238

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt conversion, converted instrument, amount

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, convertible, conversion price (in Dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

$14.53

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, convertible, terms of conversion feature

'

'

'

'

'

'

'

'

'

'

'

'

'

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, convertible, conversion price adjustment

'

'

'

'

'

'

'

'

'

'

'

'

$0.03

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, convertible, conversion ratio adjustment

'

'

'

'

'

'

'

'

'

'

'

'

27.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, convertible, if-converted value in excess of principal

'

'

'

'

'

'

'

'

'

'

'

'

15,720,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of properties refinanced

'

'

'

'

'

'

'

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, description of variable rate basis

'

'

'

'

'

'

'The revolving credit facility accrues interest at EURIBOR plus 2.20% per annum (2.41% at June 30, 2014).

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'The loans bear interest at a rate of LIBOR plus 2.75%

'

'

'

'

'The loan bears interest at a) LIBOR plus 2.25% or b) the lender’s prime rate, at Griffon’s option.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, basis spread on variable rate

'

'

'

1.30%

2.20%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.75%

'

'

'

'

2.25%

'

'

'

2.75%

2.80%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.25%

'

2.50%

'

'

'

'

'

'

'

'

'

Long-term debt, gross

'

819,598,000

'

'

819,598,000

'

'

'

'

702,501,000

'

'

'

'

'

'

'

'

'

'

'

600,000,000

[1]

'

600,000,000

[1]

'

'

0

[1]

0

[1]

'

0

[1]

'

550,000,000

[1]

'

16,603,000

[2]

'

16,603,000

[2]

'

13,212,000

[2]

29,583,000

[3]

'

29,583,000

[3]

'

21,098,000

[3]

'

'

'

'

'

'

'

'

'

'

8,798,000

[4]

'

8,798,000

[4]

'

'

9,529,000

[4]

'

30,612,000

[5]

'

30,612,000

[5]

'

3,115,000

[5]

7,754,000

[5]

'

'

'

7,754,000

[5]

'

4,606,000

[5]

'

'

'

'

'

'

25,000,000

[1]

'

25,000,000

[1]

'

'

0

[1]

Number of refinanced ESOP loan

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of new term loan refinance from esop loans

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount of line note available to purchase common stock in open market

10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares purchased for award (in Shares)

'

'

'

'

749,977

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares purchased for award value

'

'

'

'

10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, periodic payment, principal

'

'

'

'

419,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

505,000

'

'

'

'

'

'

'

'

'

'

625,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument balloon payment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

22,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from issuance of long-term debt

'

'

'

'

682,913,000

303,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

14,290,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Capital lease maturity year

'

'

'

'

'

'

'

'2022

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, percentage bearing fixed interest, percentage rate

'

'

'

'

'

'

'

5.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from long-term lines of credit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20,000,000

'

'

'

'

'

'

'

'

'

'

'

10,000,000

'

'

'

'

'

'

15,000,000

'

15,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, number of loans

'

'

'

'

'

'

'

'

'

'

2

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maintains maximum amount of line of credit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$5,700,000

'

$5,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, interest rate during period

'

'

'

'

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.50%

[1]

'

5.50%

[1]

'

'

'

'

7.40%

[1]

7.40%

[1]

7.40%

[1]

'

'

3.80%

[2]

4.90%

[2]

4.00%

[2]

4.90%

[2]

'

2.90%

[3]

2.80%

[3]

3.20%

[3]

2.90%

[3]

'

'

'

'

'

'

'

'

16.80%

'

'

5.30%

[4]

5.30%

[4]

5.40%

[4]

5.30%

[4]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility, interest rate at period end

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.46%

2.51%

'

'

'

'

'

'

Debt instrument, interest rate at period end

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.25%

[1]

'

5.25%

[1]

'

'

'

'

'

'

'

7.10%

[1]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.50%

'

2.41%

'

'

'

'

5.00%

[4]

'

5.00%

[4]

'

'

5.00%

[4]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, interest rate, effective percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.00%

'

5.25%

'

'

'

'

'

'

'

'

[1]

On February 27, 2014, in an unregistered offering through a private placement under Rule 144A, Griffon issued, at par, $600,000 of 5.25% Senior Notes due 2022 (“Senior Notes”); interest is payable semi-annually on March 1 and September 1, starting September 1, 2014. Proceeds from the Senior Notes were used to redeem $550,000 of 7.125% senior notes due 2018, to pay a tender offer premium of $31,530 and to make interest payments of $16,716, with the balance used to pay a portion of the transaction fees and expenses. The Senior Notes are senior unsecured obligations of Griffon guaranteed by certain domestic subsidiaries, and subject to certain covenants, limitations and restrictions. On June 18, 2014, Griffon exchanged all of the Senior Notes for substantially identical Senior Notes registered under the Securities Act of 1933 via an exchange offer.In connection with these transactions, Griffon capitalized $9,950 of underwriting fees and other expenses incurred related to issuance of the Senior Notes, which will amortize over the term of such notes. Griffon recognized a loss on the early extinguishment of debt on the 7.125% senior notes aggregating $38,890, comprised of the $31,530 tender offer premium, the write-off of $6,574 of remaining deferred financing fees and $786 of prepaid interest on defeased notes. On February 14, 2014, Griffon amended its $225,000 Revolving Credit Facility (“Credit Agreement”) to extend its maturity date from March 28, 2018 to March 28, 2019, and to revise certain financial maintenance and negative covenants to improve Griffon's financial and operating flexibility. The facility includes a letter of credit sub-facility with a limit of $60,000, a multi-currency sub-facility of $50,000 and a swing line sub-facility with a limit of $30,000. Borrowings under the Credit Agreement may be repaid and re-borrowed at any time, subject to final maturity of the facility or the occurrence of a default or an event of default under the Credit Agreement. Interest is payable on borrowings at either a LIBOR or base rate benchmark rate, in each case without a floor, plus an applicable margin, which adjusts based on financial performance. The current margins are 1.25% for base rate loans and 2.25% for LIBOR loans. The Credit Agreement has certain financial maintenance tests including a maximum total leverage ratio, a maximum senior secured leverage ratio and a minimum interest coverage ratio as well as customary affirmative and negative covenants and events of default. The Credit Agreement also includes certain restrictions, such as limitations on the ability of Griffon to incur indebtedness and liens and to make restricted payments and investments. Borrowings under the Credit Agreement are guaranteed by Griffon’s material domestic subsidiaries and are secured, on a first priority basis, by substantially all assets of the Company and the guarantors and a pledge of not greater than 65% of the equity interest in each of Griffon’s material, first-tier foreign subsidiaries (except that a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the debt under the ESOP credit agreement ranks pari passu with the lien granted on such assets under the Credit Agreement; see footnote (d) below). At June 30, 2014, outstanding borrowings and standby letters of credit were $25,000 and $20,365, respectively; $179,635 was available for borrowing at that date.

[2]

On October 21, 2013, Griffon refinanced two properties’ real estate mortgages to secure loans totaling $17,175. The loans mature in October 2018, are collateralized by the related properties and are guaranteed by Griffon. The loans bear interest at a rate of LIBOR plus 2.75%. At June 30, 2014, $16,603 was outstanding.

[3]

In December 2013, Griffon’s Employee Stock Ownership Plan (“ESOP”) entered into a credit agreement which refinanced the two existing ESOP loans into one new Term Loan in the amount of $21,098. The agreement also provided a Line Note with $10,000 available to purchase shares of Griffon common stock in the open market through September 29, 2014. As of June 30, 2014, 749,977 shares of Griffon common stock, for a total of $10,000, were purchased with proceeds from the Line Note. In March 2014, the Line Note was combined with the Term Loan to form one new term loan. The loan bears interest at a) LIBOR plus 2.25% or b) the lender’s prime rate, at Griffon’s option. The loan requires quarterly principal payments of $505 through September 30, 2014 and $419 per quarter thereafter, with a balloon payment of approximately $22,400 due at maturity in December 2018. The loan is secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment. As of June 30, 2014, $29,583 was outstanding.In July 2014, Griffon's ESOP entered into an amendment to the existing agreement which provides for an additional $10,000 Line Note available to purchase shares in the open market. The new Line Note will bear interest at a) LIBOR plus 2.75% or b) the lender’s prime rate, at Griffon’s option, through its expiration date on June 30, 2015. Upon expiration or at an earlier date, at Griffon’s option, the new Line Note will be combined with the Term Loan and require quarterly principal payments based on the remaining amortization schedule at a weighted average interest rate of the combined loans, with a balloon payment due at the final maturity date of December 31, 2018, based on the new amortization schedule. The new Line Note and the Term Loan are secured by shares purchased with the proceeds of the loan and with a lien on the assets of Griffon and its material domestic subsidiaries securing a limited amount of the loan (which lien ranks pari passu with the lien granted on such assets securing the debt under Griffon’s revolving credit facility; see footnote (a) above), and Griffon guarantees repayment.

[4]

In October 2006, CBP entered into a capital lease totaling $14,290 for real estate in Troy, Ohio. The lease matures in 2022, bears interest at a fixed rate of 5.0%, is secured by a mortgage on the real estate and is guaranteed by Griffon. At June 30, 2014, $8,798 was outstanding.

[5]

In November 2010, Clopay Europe GmbH (“Clopay Europe”) entered into a €10,000 revolving credit facility and a €20,000 term loan. The term loan was paid off in December 2013 and the revolver had borrowings of $4,093 at June 30, 2014. The revolving facility matures in November 2014, but is renewable upon mutual agreement with the bank. The revolving credit facility accrues interest at EURIBOR plus 2.20% per annum (2.41% at June 30, 2014). Clopay Europe is required to maintain a certain minimum equity to assets ratio and keep leverage below a certain level, defined as the ratio of total debt to EBITDA.Clopay do Brazil maintains lines of credit of approximately $5,700. Interest on borrowings accrues at a rate of Brazilian CDI plus 6.0% (16.80% at June 30, 2014). At June 30, 2014 there was $3,660 borrowed under the lines. Clopay Plastic Products Company, Inc. guarantees the loan and lines.In November 2012, Garant G.P. (“Garant”) entered into a CAD $15,000 revolving credit facility. The facility accrues interest at LIBOR (USD) or the Bankers Acceptance Rate (CDN) plus 1.3% per annum (1.46% LIBOR USD and 2.51% Bankers Acceptance Rate CDN as of June 30, 2014). The revolving facility matures in November 2015. Garant is required to maintain a certain minimum equity. At June 30, 2014, there were no borrowings under the revolving credit facility with CAD $15,000 available for borrowing.In December 2013 and May 2014, Northcote Holdings Pty Ltd entered into two term loans in the outstanding amounts of AUD $12,500 and AUD $20,000, respectively. The AUD $12,500 and AUD $20,000 term loans are unsecured and require quarterly interest payments, with quarterly principal payments of $625 beginning in August 2015 on the AUD $20,000 term loan. Remaining principal is due at maturity in December 2016 and May 2017, respectively. The loans accrue interest at Bank Bill Swap Bid Rate “BBSY” plus 2.8% per annum (5.5% at June 30, 2014 for each loan). As of June 30, 2014, Griffon had an outstanding combined balance of $30,612 on the term loans. Subsidiaries of Northcote Holdings Pty Ltd also maintain two lines of credit of AUD $3,000 and AUD $5,000 which accrue interest at BBSY plus 2.25% per annum (5.00% at June 30, 2014) and 2.50% per annum (5.25% at June 30, 2014), respectively. At June 30, 2014, there were no outstanding borrowings under the lines. Griffon Corporation guarantees the term loans and the AUD $3,000 line of credit; the assets of a subsidiary of Northcote Holdings Pty Ltd secures the AUD $5,000 line of credit.

SHAREHOLDERS_EQUITY_Details

SHAREHOLDERS' EQUITY (Details) (USD $)

0 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

33 Months Ended

0 Months Ended

1 Months Ended

3 Months Ended

3 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

Jan. 10, 2014

Dec. 31, 2013

Aug. 31, 2011

Feb. 28, 2011

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Jun. 30, 2014

Jun. 30, 2013

Sep. 30, 2013

Apr. 30, 2014

Jul. 30, 2014

Jul. 31, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Jan. 10, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Subsequent Event [Member]

Subsequent Event [Member]

Incentive Plan [Member]

Incentive Stock Options [Member]

Two Thousand Six Equity Incentive Plan [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Performance Shares [Member]

Performance Shares [Member]

Restricted Stock Units (RSUs) [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

ESOP Loan July 2014 [Member]

installment

SHAREHOLDERS' EQUITY (Details) [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock, dividends, per share, cash paid (in Dollars per share)

'

'

'

'

$0.03

$0.03

$0.03

$0.03

$0.03

$0.03

$0.09

$0.08

$0.10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividends declared, amount per share (in Dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.03

'

'

'

'

'

'

'

'

'

'

'

'

Number of additional shares authorized for awards (in Shares)

'

'

'

1,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based compensation arrangement by share-based payment award, description

'

'

'

'

'

'

'

'

'

'

'Options granted under the Incentive Plan may be either “incentive stock options” or nonqualified stock options, generally expire ten years after the date of grant and are granted at an exercise price of not less than 100% of the fair market value at the date of grant.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based compensation arrangement by share-based payment award, expiration period

'

'

'

'

'

'

'

'

'

'

'10 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum percentage of exercise price at grand date fair value

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of shares authorized for award (in Shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,200,000

'

'

'

'

'

'

'

'

'

'

New shares issued (in Shares)

44,476

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

600,000

'

'

'

'

'

'

'

'

'

'

Number of shares available for grant (in Shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

989,895

'

'

'

'

'

'

'

'

'

Share based compensation arrangement by share based payment award equity instruments other than options additional grants in future (in Shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

Equity instruments other than options, grants in period (in Shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

518,490

599,328

461,827

554,498

'

'

'

'

Award vesting period

'

'

'

'

'

'

'4 years

'

'

'

'

'

'

'

'

'

'

'

'

'4 years

'

'

'

'3 years

'

'

'

Equity instruments other than options, vested in period, fair value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$7,074,000

$7,426,000

'

'

'

'

'

'

Equity instruments other than options, grants in period, weighted average grant date fair value (in Dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$13.64

$12.39

'

'

'

'

'

'

Stock-based compensation

'

'

'

'

3,137,000

'

'

'

3,029,000

'

8,133,000

9,327,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock repurchase program, authorized amount

'

50,000,000

50,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10,000,000

10,000,000

Stock repurchased during period, shares (in Shares)

'

4,444,444

'

'

750,000

'

'

'

'

'

1,348,481

'

'

6,436,712

'

'

'

'

'

'

'

'

'

'

629,977

120,000

749,977

Stock repurchased during period, value

584,000

'

'

'

8,784,000

'

16,285,000

'

'

'

'

'

'

65,315,000

'

'

'

'

'

'

'

'

'

'

8,409,000

1,591,000

10,000,000

Stock repurchased during period per share (in Dollars per share)

$13.13

$11.25

'

'

$11.71

'

$12.08

'

'

'

'

'

'

$10.15

'

'

'

'

'

'

'

'

'

'

$13.35

$13.26

$13.33

Stock repurchase program, remaining authorized repurchase amount

'

'

'

'

'

'

45,742,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares paid for tax withholding for share based compensation (in Shares)

'

'

'

'

33,046

'

444,110

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares paid for tax withholding for share based compensation, value

'

'

'

'

0

'

5,631,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares paid for tax withholding for share based compensation, value per share (in Dollars per share)

'

'

'

'

$11.02

'

$12.68

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of installments for vesting of stock awards

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3

'

'

'

Stock repurchase during period stock closing price discount percent

'

9.20%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock repurchase program, number of shares authorized to be repurchased (in Shares)

'

5,560,000

'

'

'

'

5,560,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock repurchase program number of shares authorized to be repurchased percent

'

10.00%

'

'

'

'

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount of line note available to purchase common stock in open market

'

$10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

$10,000,000

'

'

'

'

'

'

'

'

'

'

'

EARNINGS_PER_SHARE_EPS_Details

EARNINGS PER SHARE (EPS) (Details) - Summary of Reconciliation of Share Amounts Used in Earnings Per Share	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Weighted average shares outstanding - basic	48,370	54,265	50,038	54,588
Incremental shares from stock based compensation	1,466	1,939	0	2,147
Weighted average shares outstanding - diluted	49,836	56,204	50,038	56,735
Options [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive restricted stock excluded from diluted EPS computation	643	715	643	715
Restricted stock [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive restricted stock excluded from diluted EPS computation	0	0	1,609	0

BUSINESS_SEGMENTS_Details_Summ

BUSINESS SEGMENTS (Details) - Summary of Reconciliation of Segment Profit Before Taxes and Operations (USD $)	3 Months Ended						9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Jun. 30, 2013
Home & Building Products:	'	'	'	'	'	'	'	'
Revenue	$505,039	'	'	$509,826	'	'	$1,466,184	$1,422,318
Segment operating profit:	'	'	'	'	'	'	'	'
Segment operating profit	21,814	'	'	20,362	'	'	58,468	44,807
Net interest expense	-11,541	'	'	-13,137	'	'	-37,003	-39,125
Unallocated amounts	-6,521	'	'	-6,573	'	'	-22,895	-22,140
Loss from debt extinguishment, net	0	'	'	0	'	'	-38,890	0
Loss on pension settlement	0	'	'	0	'	-2,142	0	-2,142
Income (loss) before taxes	12,894	'	'	7,832	'	'	-13,115	7,197
Segment adjusted EBITDA:	'	'	'	'	'	'	'	'
Segment adjusted EBITDA	49,605	'	'	46,785	'	'	139,686	135,119
Net interest expense	-11,541	'	'	-13,137	'	'	-37,003	-39,125
Segment depreciation and amortization	-16,691	'	'	-17,639	'	'	-49,723	-52,467
Unallocated amounts	-6,521	'	'	-6,573	'	'	-22,895	-22,140
Loss from debt extinguishment, net	0	'	'	0	'	'	-38,890	0
Restructuring charges	-358	-692	-842	-1,604	-9,336	-1,108	-1,892	-12,048
Acquisition costs	-1,600	'	'	0	'	'	-2,398	0
Loss on pension settlement	0	'	'	0	'	-2,142	0	-2,142
Segment:	'	'	'	'	'	'	'	'
Segment depreciation and amortization	16,691	'	'	17,639	'	'	49,723	52,467
Consolidated depreciation and amortization	16,795	'	'	17,749	'	'	50,027	52,787
Segment:	'	'	'	'	'	'	'	'
Capital expenditures	20,014	'	'	14,891	'	'	54,859	45,886
Ames True Temper Inc [Member]	'	'	'	'	'	'	'	'
Home & Building Products:	'	'	'	'	'	'	'	'
Revenue	132,179	'	'	128,332	'	'	389,492	341,878
Segment adjusted EBITDA:	'	'	'	'	'	'	'	'
Restructuring charges	'	'	'	'	'	'	-8,000	'
Clopay Building Products [Member]	'	'	'	'	'	'	'	'
Home & Building Products:	'	'	'	'	'	'	'	'
Revenue	121,814	'	'	112,285	'	'	334,494	314,651
Home And Building Products [Member]	'	'	'	'	'	'	'	'
Home & Building Products:	'	'	'	'	'	'	'	'
Revenue	253,993	'	'	240,617	'	'	723,986	656,529
Segment operating profit:	'	'	'	'	'	'	'	'
Segment operating profit	9,747	'	'	11,549	'	'	27,958	22,655
Segment adjusted EBITDA:	'	'	'	'	'	'	'	'
Segment adjusted EBITDA	19,596	'	'	21,478	'	'	55,787	56,272
Segment depreciation and amortization	-7,891	'	'	-9,075	'	'	-23,539	-27,092
Restructuring charges	-358	'	'	-854	'	'	-1,892	-6,525
Segment:	'	'	'	'	'	'	'	'
Segment depreciation and amortization	7,891	'	'	9,075	'	'	23,539	27,092
Segment:	'	'	'	'	'	'	'	'
Capital expenditures	8,194	'	'	6,534	'	'	23,384	22,352
Telephonics [Member]	'	'	'	'	'	'	'	'
Home & Building Products:	'	'	'	'	'	'	'	'
Revenue	102,446	'	'	129,997	'	'	302,656	347,678
Segment operating profit:	'	'	'	'	'	'	'	'
Segment operating profit	13,134	'	'	10,592	'	'	34,463	38,990
Segment adjusted EBITDA:	'	'	'	'	'	'	'	'
Segment adjusted EBITDA	15,087	'	'	13,146	'	'	40,018	45,015
Segment depreciation and amortization	-1,953	'	'	-1,804	'	'	-5,555	-5,275
Segment:	'	'	'	'	'	'	'	'
Segment depreciation and amortization	1,953	'	'	1,804	'	'	5,555	5,275
Segment:	'	'	'	'	'	'	'	'
Capital expenditures	6,082	'	'	2,401	'	'	14,969	5,853
Plastics [Member]	'	'	'	'	'	'	'	'
Home & Building Products:	'	'	'	'	'	'	'	'
Revenue	148,600	'	'	139,212	'	'	439,542	418,111
Segment operating profit:	'	'	'	'	'	'	'	'
Segment operating profit	8,075	'	'	5,401	'	'	23,252	8,959
Segment adjusted EBITDA:	'	'	'	'	'	'	'	'
Segment adjusted EBITDA	14,922	'	'	12,161	'	'	43,881	33,832
Segment depreciation and amortization	-6,847	'	'	-6,760	'	'	-20,629	-20,100
Segment:	'	'	'	'	'	'	'	'
Segment depreciation and amortization	6,847	'	'	6,760	'	'	20,629	20,100
Segment:	'	'	'	'	'	'	'	'
Capital expenditures	5,063	'	'	5,947	'	'	15,213	17,648
Operating Segments [Member]	'	'	'	'	'	'	'	'
Segment operating profit:	'	'	'	'	'	'	'	'
Segment operating profit	30,956	'	'	27,542	'	'	85,673	70,604
Segment:	'	'	'	'	'	'	'	'
Capital expenditures	19,339	'	'	14,882	'	'	53,566	45,853
Corporate Segment [Member]	'	'	'	'	'	'	'	'
Segment:	'	'	'	'	'	'	'	'
Consolidated depreciation and amortization	104	'	'	110	'	'	304	320
Segment:	'	'	'	'	'	'	'	'
Capital expenditures	$675	'	'	$9	'	'	$1,293	$33

BUSINESS_SEGMENTS_Details_Summ1

BUSINESS SEGMENTS (Details) - Summary of Segment Assets (USD $)	Jun. 30, 2014	Sep. 30, 2013
In Thousands, unless otherwise specified
Segment assets:	'	'
Continuing Assets	$1,827,009	$1,784,490
Assets of discontinued operations	4,241	4,289
Total Assets	1,831,250	1,788,779
Home And Building Products [Member]	'	'
Segment assets:	'	'
Continuing Assets	1,020,849	908,386
Telephonics [Member]	'	'
Segment assets:	'	'
Continuing Assets	299,058	296,919
Plastics [Member]	'	'
Segment assets:	'	'
Continuing Assets	421,892	422,730
Operating Segments [Member]	'	'
Segment assets:	'	'
Continuing Assets	1,741,799	1,628,035
Corporate Segment [Member]	'	'
Segment assets:	'	'
Continuing Assets	$85,210	$156,455

DEFINED_BENEFIT_PENSION_EXPENS2

DEFINED BENEFIT PENSION EXPENSE (Details) - Summary of Defined Benefit Pension Expense (USD $)	3 Months Ended			9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2014	Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'	'	'	'	'
Service cost	$0	$51	'	$90	$149
Interest cost	2,416	2,427	'	7,415	7,274
Expected return on plan assets	-2,820	-3,139	'	-8,590	-9,413
Amortization:	'	'	'	'	'
Prior service cost	4	5	'	11	15
Recognized actuarial loss	485	840	'	1,463	2,520
Loss on pension settlement	0	0	2,142	0	2,142
Net periodic expense	$85	$184	'	$389	$2,687

DEFINED_BENEFIT_PENSION_EXPENS3

DEFINED BENEFIT PENSION EXPENSE (Details)	3 Months Ended					9 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Mar. 31, 2014	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2014	Jun. 30, 2013
	USD ($)	USD ($)	EUR (€)	USD ($)	USD ($)	USD ($)	USD ($)
Compensation and Retirement Disclosure [Abstract]	'	'	'	'	'	'	'
Contributions by employer	'	$1,776,000	€ 1,300,000	'	'	'	'
Recognized net gain (loss) due to settlements and curtailments	'	0	'	'	'	'	'
Loss on pension settlement	0	'	'	0	2,142,000	0	2,142,000
Reduction in pension liability due to buyouts	'	'	'	'	3,472,000	'	'
Increase in accumulated other comprehensive income loss due to buyouts	'	'	'	'	$3,649,000	'	'

DISCONTINUED_OPERATIONS_Detail

DISCONTINUED OPERATIONS (Details) - Summary of Discontinued Operations (USD $)	Jun. 30, 2014	Sep. 30, 2013
In Thousands, unless otherwise specified
Assets of discontinued operations:	'	'
Prepaid and other current assets	$1,209	$1,214
Other long-term assets	3,032	3,075
Total assets of discontinued operations	4,241	4,289
Liabilities of discontinued operations:	'	'
Accrued liabilities, current	2,959	3,288
Other long-term liabilities	4,008	4,744
Total liabilities of discontinued operations	$6,967	$8,032

DISCONTINUED_OPERATIONS_Detail1

DISCONTINUED OPERATIONS (Details) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]	'	'	'	'
Installation Services revenue	$0	$0	$0	$0

RESTRUCTURING_AND_OTHER_RELATE2

RESTRUCTURING AND OTHER RELATED CHARGES (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

In Thousands, unless otherwise specified

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Sep. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Home And Building Products [Member]

Home And Building Products [Member]

Home And Building Products [Member]

Home And Building Products [Member]

Plastics Europe [Member]

Ames True Temper Inc [Member]

Ames True Temper Inc [Member]

Ames True Temper Inc [Member]

Ames True Temper Inc [Member]

Ames True Temper Inc [Member]

Ames True Temper Inc [Member]

Ames True Temper Inc [Member]

position

Restructuring Costs [Member]

Capital Expenditures [Member]

Cash Charges [Member]

Asset Impairment [Member]

One-time Termination Benefits [Member]

Facility Closing [Member]

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring charges

($358)

($692)

($842)

($1,604)

($9,336)

($1,108)

($1,892)

($12,048)

($358)

($854)

($1,892)

($6,525)

($4,773)

($8,000)

'

'

($4,000)

($4,000)

($2,500)

($1,500)

Restructuring and related cost, expected cost

'

'

'

'

'

'

'

'

'

'

'

'

'

20,000

'

'

'

'

'

'

Restructuring and related cost, cost incurred to date

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$7,941

$15,712

'

'

'

'

Restructuring and related cost, number of positions eliminated, inception to date

'

'

'

'

'

'

'

'

'

'

'

'

80

'

'

'

'

'

'

'

RESTRUCTURING_AND_OTHER_RELATE3

RESTRUCTURING AND OTHER RELATED CHARGES (Details) - Summary of Accrued Liability for the Restructuring and Related Charges (USD $)	3 Months Ended						9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Jun. 30, 2013
Amounts incurred in:	'	'	'	'	'	'	'	'
Amount incurred in	$358	$692	$842	$1,604	$9,336	$1,108	$1,892	$12,048
Restructuring Reserve [Roll Forward]	'	'	'	'	'	'	'	'
Accrued liability	'	'	3,857	'	'	'	3,857	'
Charges	'	'	'	'	'	'	1,892	'
Payments	'	'	'	'	'	'	-4,216	'
Accrued liability	1,533	'	'	'	'	'	1,533	'
Workforce Reduction [Member]	'	'	'	'	'	'	'	'
Amounts incurred in:	'	'	'	'	'	'	'	'
Amount incurred in	289	495	638	641	3,635	994	1,422	5,270
Restructuring Reserve [Roll Forward]	'	'	'	'	'	'	'	'
Accrued liability	'	'	3,057	'	'	'	3,057	'
Charges	'	'	'	'	'	'	1,422	'
Payments	'	'	'	'	'	'	-3,151	'
Accrued liability	1,328	'	'	'	'	'	1,328	'
Facilities & Exit Costs [Member]	'	'	'	'	'	'	'	'
Amounts incurred in:	'	'	'	'	'	'	'	'
Amount incurred in	47	137	95	926	683	39	279	1,648
Restructuring Reserve [Roll Forward]	'	'	'	'	'	'	'	'
Accrued liability	'	'	393	'	'	'	393	'
Charges	'	'	'	'	'	'	279	'
Payments	'	'	'	'	'	'	-599	'
Accrued liability	73	'	'	'	'	'	73	'
Other [Member]	'	'	'	'	'	'	'	'
Amounts incurred in:	'	'	'	'	'	'	'	'
Amount incurred in	22	60	109	37	1,517	75	191	1,629
Non-cash Facility and Other [Member]	'	'	'	'	'	'	'	'
Amounts incurred in:	'	'	'	'	'	'	'	'
Amount incurred in	0	0	0	0	3,501	0	0	3,501
Restructuring Reserve [Roll Forward]	'	'	'	'	'	'	'	'
Accrued liability	'	'	407	'	'	'	407	'
Charges	'	'	'	'	'	'	191	'
Payments	'	'	'	'	'	'	-466	'
Accrued liability	$132	'	'	'	'	'	$132	'

OTHER_EXPENSE_Details

OTHER EXPENSE (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Income and Expenses [Abstract]	'	'	'	'
Foreign currency transaction gain (loss), before tax	$365	$168	$1,044	($299)
Investment income, net	$1,437	$12	$1,563	$365

WARRANTY_LIABILITY_Details

WARRANTY LIABILITY (Details)	9 Months Ended
	Jun. 30, 2014
Telephonics [Member] | Minimum [Member]	'
WARRANTY LIABILITY (Details) [Line Items]	'
Product Warranty Period	'1 year
Telephonics [Member] | Maximum [Member]	'
WARRANTY LIABILITY (Details) [Line Items]	'
Product Warranty Period	'2 years
Ames True Temper Inc [Member]	'
WARRANTY LIABILITY (Details) [Line Items]	'
Product Warranty Period	'90 days

WARRANTY_LIABILITY_Details_Sum

WARRANTY LIABILITY (Details) - Summary of Changes in Warrant Liability Included in Accrued Liabilities (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]	'	'	'	'
Balance, beginning of period	$7,111	$7,424	$6,649	$8,856
Warranties issued and changes in estimated pre-existing warranties	576	1,309	2,677	1,965
Actual warranty costs incurred	-1,199	-1,342	-2,838	-3,430
Balance, end of period	$6,488	$7,391	$6,488	$7,391

OTHER_COMPREHENSIVE_INCOME_LOS2

OTHER COMPREHENSIVE INCOME (LOSS) (Details) - Summary of Other Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Comprehensive Income (Loss), Net of Tax [Abstract]	'	'	'	'
Foreign currency translation adjustments, Pre-tax	$2,809	($7,884)	$896	($10,805)
Pension and other defined benefit plans, Pre-tax	491	823	2,682	8,127
Gain on cash flow hedge, Pre-tax	0	-158	0	13
Total other comprehensive income (loss), Pre-tax	3,300	-7,219	3,578	-2,665
Pension and other defined benefit plans, Tax	-174	-333	-950	-3,288
Total other comprehensive income (loss), Tax	-174	-333	-950	-3,288
Foreign currency translation adjustments, Net of Tax	2,809	-7,884	896	-10,805
Pension and other defined benefit plans, Net of Tax	317	490	1,732	4,839
Gain on cash flow hedge, Net of Tax	0	-158	0	13
Total other comprehensive income (loss), net of taxes	$3,126	($7,552)	$2,628	($5,953)

OTHER_COMPREHENSIVE_INCOME_LOS3

OTHER COMPREHENSIVE INCOME (LOSS) (Details) - Summary of Amounts Reclassified from Accumulated Other Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Comprehensive Income (Loss), Net of Tax [Abstract]	'	'	'	'
Pension amortization	$489	$845	$1,474	$2,535
Pension settlement	0	0	0	2,142
Total before tax	489	845	1,474	4,677
Tax	-167	-296	-516	-1,341
Net of tax	$322	$549	$958	$3,336

COMMITMENTS_AND_CONTINGENCIES_

COMMITMENTS AND CONTINGENCIES (Details) (USD $)	Jun. 30, 2014	Feb. 28, 2011	Apr. 30, 2009
Commitments and Contingencies Disclosure [Abstract]	'	'	'
Net capital cost value	'	'	$5,000,000
Obligation under consent order	'	0	'
Net capital cost value in proposed remedial action plan	'	10,000,000	'
Loss contingency claim asserted	$0	'	'

RELATED_PARTY_Details

RELATED PARTY (Details) (Goldman, Sachs & Co [Member], Debt offering management fee [Member], USD $)	0 Months Ended
In Thousands, unless otherwise specified	Feb. 27, 2014
Goldman, Sachs & Co [Member] | Debt offering management fee [Member]	'
Related Party Transaction [Line Items]	'
Related party transaction, expenses from transactions with related party	$825

CONSOLIDATING_GUARANTOR_AND_NO2

CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details)	9 Months Ended
	Jun. 30, 2014
Consolidating Guarantor And Non Guarantor Financial Information [Abstract]	'
Noncontrolling interest, ownership percentage by parent	100.00%
Maximum percentage of segment adjusted EBITDA to business EBITDA	50.00%

CONSOLIDATING_GUARANTOR_AND_NO3

CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Balance Sheets (USD $)	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
CURRENT ASSETS	'	'	'	'
Cash and equivalents	$87,437	$178,130	$126,104	$209,654
Accounts receivable, net of allowances	269,669	256,215	'	'
Contract costs and recognized income not yet billed, net of progress payments	104,877	109,828	'	'
Inventories, net	278,462	230,120	'	'
Prepaid and other current assets	74,290	48,903	'	'
Assets of discontinued operations	1,209	1,214	'	'
Total Current Assets	815,944	824,410	'	'
PROPERTY, PLANT AND EQUIPMENT, net	365,376	353,593	'	'
GOODWILL	381,315	357,730	'	'
INTANGIBLE ASSETS, net	235,092	221,391	'	'
INTERCOMPANY RECEIVABLE	0	0	'	'
EQUITY INVESTMENTS IN SUBSIDIARIES	0	0	'	'
OTHER ASSETS	30,491	28,580	'	'
ASSETS OF DISCONTINUED OPERATIONS	3,032	3,075	'	'
Total Assets	1,831,250	1,788,779	'	'
CURRENT LIABILITIES	'	'	'	'
Notes payable and current portion of long-term debt	11,886	10,768	'	'
Accounts payable and accrued liabilities	284,773	270,353	'	'
Liabilities of discontinued operations	2,959	3,288	'	'
Total Current Liabilities	299,618	284,409	'	'
LONG-TERM DEBT, net of debt discounts	797,180	678,487	'	'
INTERCOMPANY PAYABLES	0	0	'	'
OTHER LIABILITIES	162,103	170,675	'	'
LIABILITIES OF DISCONTINUED OPERATIONS	4,008	4,744	'	'
Total Liabilities	1,262,909	1,138,315	'	'
Total Shareholders’ Equity	568,341	650,464	'	'
Total Liabilities and Shareholders’ Equity	1,831,250	1,788,779	'	'
Parent Company [Member]	'	'	'	'
CURRENT ASSETS	'	'	'	'
Cash and equivalents	9,208	68,994	35,260	125,093
Accounts receivable, net of allowances	0	0	'	'
Contract costs and recognized income not yet billed, net of progress payments	0	0	'	'
Inventories, net	0	0	'	'
Prepaid and other current assets	21,180	-712	'	'
Assets of discontinued operations	0	0	'	'
Total Current Assets	30,388	68,282	'	'
PROPERTY, PLANT AND EQUIPMENT, net	1,392	972	'	'
GOODWILL	0	0	'	'
INTANGIBLE ASSETS, net	0	0	'	'
INTERCOMPANY RECEIVABLE	547,665	547,903	'	'
EQUITY INVESTMENTS IN SUBSIDIARIES	802,548	772,374	'	'
OTHER ASSETS	46,687	45,968	'	'
ASSETS OF DISCONTINUED OPERATIONS	0	0	'	'
Total Assets	1,428,680	1,435,499	'	'
CURRENT LIABILITIES	'	'	'	'
Notes payable and current portion of long-term debt	1,762	1,000	'	'
Accounts payable and accrued liabilities	33,353	41,121	'	'
Liabilities of discontinued operations	0	0	'	'
Total Current Liabilities	35,115	42,121	'	'
LONG-TERM DEBT, net of debt discounts	742,289	656,852	'	'
INTERCOMPANY PAYABLES	21,450	20,607	'	'
OTHER LIABILITIES	61,485	65,455	'	'
LIABILITIES OF DISCONTINUED OPERATIONS	0	0	'	'
Total Liabilities	860,339	785,035	'	'
Total Shareholders’ Equity	568,341	650,464	'	'
Total Liabilities and Shareholders’ Equity	1,428,680	1,435,499	'	'
Guarantor Companies [Member]	'	'	'	'
CURRENT ASSETS	'	'	'	'
Cash and equivalents	19,500	25,343	23,036	34,782
Accounts receivable, net of allowances	222,754	213,506	'	'
Contract costs and recognized income not yet billed, net of progress payments	104,518	109,683	'	'
Inventories, net	200,772	173,406	'	'
Prepaid and other current assets	23,835	21,854	'	'
Assets of discontinued operations	0	0	'	'
Total Current Assets	571,379	543,792	'	'
PROPERTY, PLANT AND EQUIPMENT, net	261,632	248,973	'	'
GOODWILL	288,147	288,146	'	'
INTANGIBLE ASSETS, net	157,861	160,349	'	'
INTERCOMPANY RECEIVABLE	877,793	911,632	'	'
EQUITY INVESTMENTS IN SUBSIDIARIES	682,810	533,742	'	'
OTHER ASSETS	51,205	50,423	'	'
ASSETS OF DISCONTINUED OPERATIONS	0	0	'	'
Total Assets	2,890,827	2,737,057	'	'
CURRENT LIABILITIES	'	'	'	'
Notes payable and current portion of long-term debt	1,129	1,079	'	'
Accounts payable and accrued liabilities	187,496	183,665	'	'
Liabilities of discontinued operations	0	0	'	'
Total Current Liabilities	188,625	184,744	'	'
LONG-TERM DEBT, net of debt discounts	8,096	9,006	'	'
INTERCOMPANY PAYABLES	746,378	796,741	'	'
OTHER LIABILITIES	149,029	153,970	'	'
LIABILITIES OF DISCONTINUED OPERATIONS	0	0	'	'
Total Liabilities	1,092,128	1,144,461	'	'
Total Shareholders’ Equity	1,798,699	1,592,596	'	'
Total Liabilities and Shareholders’ Equity	2,890,827	2,737,057	'	'
Non-Guarantor Companies [Member]	'	'	'	'
CURRENT ASSETS	'	'	'	'
Cash and equivalents	58,729	83,793	67,808	49,779
Accounts receivable, net of allowances	78,918	76,241	'	'
Contract costs and recognized income not yet billed, net of progress payments	359	145	'	'
Inventories, net	77,550	56,723	'	'
Prepaid and other current assets	18,714	17,330	'	'
Assets of discontinued operations	1,209	1,214	'	'
Total Current Assets	235,479	235,446	'	'
PROPERTY, PLANT AND EQUIPMENT, net	102,352	103,648	'	'
GOODWILL	93,168	69,584	'	'
INTANGIBLE ASSETS, net	77,231	61,042	'	'
INTERCOMPANY RECEIVABLE	122,932	573,269	'	'
EQUITY INVESTMENTS IN SUBSIDIARIES	1,916,521	2,718,956	'	'
OTHER ASSETS	7,812	7,423	'	'
ASSETS OF DISCONTINUED OPERATIONS	3,032	3,075	'	'
Total Assets	2,558,527	3,772,443	'	'
CURRENT LIABILITIES	'	'	'	'
Notes payable and current portion of long-term debt	8,995	8,689	'	'
Accounts payable and accrued liabilities	84,571	70,427	'	'
Liabilities of discontinued operations	2,959	3,288	'	'
Total Current Liabilities	96,525	82,404	'	'
LONG-TERM DEBT, net of debt discounts	46,795	12,629	'	'
INTERCOMPANY PAYABLES	733,551	1,188,017	'	'
OTHER LIABILITIES	25,921	25,578	'	'
LIABILITIES OF DISCONTINUED OPERATIONS	4,008	4,744	'	'
Total Liabilities	906,800	1,313,372	'	'
Total Shareholders’ Equity	1,651,727	2,459,071	'	'
Total Liabilities and Shareholders’ Equity	2,558,527	3,772,443	'	'
Elimination [Member]	'	'	'	'
CURRENT ASSETS	'	'	'	'
Cash and equivalents	0	0	0	0
Accounts receivable, net of allowances	-32,003	-33,532	'	'
Contract costs and recognized income not yet billed, net of progress payments	0	0	'	'
Inventories, net	140	-9	'	'
Prepaid and other current assets	10,561	10,431	'	'
Assets of discontinued operations	0	0	'	'
Total Current Assets	-21,302	-23,110	'	'
PROPERTY, PLANT AND EQUIPMENT, net	0	0	'	'
GOODWILL	0	0	'	'
INTANGIBLE ASSETS, net	0	0	'	'
INTERCOMPANY RECEIVABLE	-1,548,390	-2,032,804	'	'
EQUITY INVESTMENTS IN SUBSIDIARIES	-3,401,879	-4,025,072	'	'
OTHER ASSETS	-75,213	-75,234	'	'
ASSETS OF DISCONTINUED OPERATIONS	0	0	'	'
Total Assets	-5,046,784	-6,156,220	'	'
CURRENT LIABILITIES	'	'	'	'
Notes payable and current portion of long-term debt	0	0	'	'
Accounts payable and accrued liabilities	-20,647	-24,860	'	'
Liabilities of discontinued operations	0	0	'	'
Total Current Liabilities	-20,647	-24,860	'	'
LONG-TERM DEBT, net of debt discounts	0	0	'	'
INTERCOMPANY PAYABLES	-1,501,379	-2,005,365	'	'
OTHER LIABILITIES	-74,332	-74,328	'	'
LIABILITIES OF DISCONTINUED OPERATIONS	0	0	'	'
Total Liabilities	-1,596,358	-2,104,553	'	'
Total Shareholders’ Equity	-3,450,426	-4,051,667	'	'
Total Liabilities and Shareholders’ Equity	($5,046,784)	($6,156,220)	'	'

CONSOLIDATING_GUARANTOR_AND_NO4

CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) (USD $)	3 Months Ended						9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Jun. 30, 2013
Condensed Income Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Revenue	$505,039	'	'	$509,826	'	'	$1,466,184	$1,422,318
Cost of goods and services	386,732	'	'	401,515	'	'	1,132,387	1,110,840
Gross profit	118,307	'	'	108,311	'	'	333,797	311,478
Selling, general and administrative expenses	96,135	'	'	86,345	'	'	273,437	254,623
Restructuring and other related charges	358	692	842	1,604	9,336	1,108	1,892	12,048
Total operating expenses	96,493	'	'	87,949	'	'	275,329	266,671
Income from operations	21,814	'	'	20,362	'	'	58,468	44,807
Other income (expense)	'	'	'	'	'	'	'	'
Interest income (expense), net	-11,541	'	'	-13,137	'	'	-37,003	-39,125
Loss from debt extinguishment, net	0	'	'	0	'	'	-38,890	0
Other, net	2,621	'	'	607	'	'	4,310	1,515
Total other expense, net	-8,920	'	'	-12,530	'	'	-71,583	-37,610
Income (loss) before taxes	12,894	'	'	7,832	'	'	-13,115	7,197
Provision (benefit) for income taxes	-1,570	'	'	4,229	'	'	-4,990	3,855
Income (loss) before equity in net income of subsidiaries	14,464	'	'	3,603	'	'	-8,125	3,342
Equity in net income (loss) of subsidiaries	0	'	'	0	'	'	0	0
Net income (loss)	14,464	'	'	3,603	'	'	-8,125	3,342
Foreign currency translation adjustments	2,809	'	'	-7,884	'	'	896	-10,805
Other comprehensive income (loss), net of taxes	3,126	'	'	-7,552	'	'	2,628	4,852
Comprehensive income (loss), net	17,590	'	'	-3,949	'	'	-5,497	-2,611
Parent Company [Member]	'	'	'	'	'	'	'	'
Condensed Income Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Revenue	0	'	'	0	'	'	0	0
Cost of goods and services	0	'	'	0	'	'	0	0
Gross profit	0	'	'	0	'	'	0	0
Selling, general and administrative expenses	7,034	'	'	4,141	'	'	20,525	15,419
Restructuring and other related charges	0	'	'	0	'	'	0	0
Total operating expenses	7,034	'	'	4,141	'	'	20,525	15,419
Income from operations	-7,034	'	'	-4,141	'	'	-20,525	-15,419
Other income (expense)	'	'	'	'	'	'	'	'
Interest income (expense), net	-1,750	'	'	-3,559	'	'	-8,240	-10,781
Loss from debt extinguishment, net	0	'	'	'	'	'	-38,890	'
Other, net	1,436	'	'	12	'	'	1,563	367
Total other expense, net	-314	'	'	-3,547	'	'	-45,567	-10,414
Income (loss) before taxes	-7,348	'	'	-7,688	'	'	-66,092	-25,833
Provision (benefit) for income taxes	-9,322	'	'	-2,913	'	'	-24,901	-12,672
Income (loss) before equity in net income of subsidiaries	1,974	'	'	-4,775	'	'	-41,191	-13,161
Equity in net income (loss) of subsidiaries	12,490	'	'	8,378	'	'	33,066	16,503
Net income (loss)	14,464	'	'	3,603	'	'	-8,125	3,342
Foreign currency translation adjustments	'	'	'	'	'	'	'	0
Other comprehensive income (loss), net of taxes	171	'	'	211	'	'	511	633
Comprehensive income (loss), net	14,635	'	'	3,814	'	'	-7,614	3,975
Guarantor Companies [Member]	'	'	'	'	'	'	'	'
Condensed Income Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Revenue	392,361	'	'	408,371	'	'	1,133,510	1,109,275
Cost of goods and services	295,148	'	'	317,156	'	'	860,322	848,342
Gross profit	97,213	'	'	91,215	'	'	273,188	260,933
Selling, general and administrative expenses	71,110	'	'	69,015	'	'	207,725	198,601
Restructuring and other related charges	349	'	'	1,565	'	'	1,841	8,045
Total operating expenses	71,459	'	'	70,580	'	'	209,566	206,646
Income from operations	25,754	'	'	20,635	'	'	63,622	54,287
Other income (expense)	'	'	'	'	'	'	'	'
Interest income (expense), net	-7,367	'	'	-6,982	'	'	-21,946	-20,685
Loss from debt extinguishment, net	0	'	'	'	'	'	0	'
Other, net	2,497	'	'	2,462	'	'	5,569	6,227
Total other expense, net	-4,870	'	'	-4,520	'	'	-16,377	-14,458
Income (loss) before taxes	20,884	'	'	16,115	'	'	47,245	39,829
Provision (benefit) for income taxes	7,322	'	'	6,745	'	'	19,014	15,693
Income (loss) before equity in net income of subsidiaries	13,562	'	'	9,370	'	'	28,231	24,136
Equity in net income (loss) of subsidiaries	-1,161	'	'	-969	'	'	4,587	-7,565
Net income (loss)	12,401	'	'	8,401	'	'	32,818	16,571
Foreign currency translation adjustments	'	'	'	'	'	'	'	330
Other comprehensive income (loss), net of taxes	-592	'	'	836	'	'	1,277	3,963
Comprehensive income (loss), net	11,809	'	'	9,237	'	'	34,095	20,864
Non-Guarantor Companies [Member]	'	'	'	'	'	'	'	'
Condensed Income Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Revenue	126,343	'	'	114,004	'	'	375,877	352,514
Cost of goods and services	103,938	'	'	95,461	'	'	310,887	297,826
Gross profit	22,405	'	'	18,543	'	'	64,990	54,688
Selling, general and administrative expenses	19,617	'	'	14,793	'	'	50,025	45,327
Restructuring and other related charges	9	'	'	39	'	'	51	4,003
Total operating expenses	19,626	'	'	14,832	'	'	50,076	49,330
Income from operations	2,779	'	'	3,711	'	'	14,914	5,358
Other income (expense)	'	'	'	'	'	'	'	'
Interest income (expense), net	-2,424	'	'	-2,596	'	'	-6,817	-7,659
Loss from debt extinguishment, net	0	'	'	'	'	'	0	'
Other, net	-997	'	'	-1,710	'	'	-2,365	-4,498
Total other expense, net	-3,421	'	'	-4,306	'	'	-9,182	-12,157
Income (loss) before taxes	-642	'	'	-595	'	'	5,732	-6,799
Provision (benefit) for income taxes	430	'	'	397	'	'	897	834
Income (loss) before equity in net income of subsidiaries	-1,072	'	'	-992	'	'	4,835	-7,633
Equity in net income (loss) of subsidiaries	13,562	'	'	9,370	'	'	28,231	24,136
Net income (loss)	12,490	'	'	8,378	'	'	33,066	16,503
Foreign currency translation adjustments	'	'	'	'	'	'	'	-11,135
Other comprehensive income (loss), net of taxes	3,547	'	'	-8,599	'	'	840	256
Comprehensive income (loss), net	16,037	'	'	-221	'	'	33,906	5,624
Elimination [Member]	'	'	'	'	'	'	'	'
Condensed Income Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Revenue	-13,665	'	'	-12,549	'	'	-43,203	-39,471
Cost of goods and services	-12,354	'	'	-11,102	'	'	-38,822	-35,328
Gross profit	-1,311	'	'	-1,447	'	'	-4,381	-4,143
Selling, general and administrative expenses	-1,626	'	'	-1,604	'	'	-4,838	-4,724
Restructuring and other related charges	0	'	'	0	'	'	0	0
Total operating expenses	-1,626	'	'	-1,604	'	'	-4,838	-4,724
Income from operations	315	'	'	157	'	'	457	581
Other income (expense)	'	'	'	'	'	'	'	'
Interest income (expense), net	0	'	'	0	'	'	0	0
Loss from debt extinguishment, net	0	'	'	'	'	'	0	'
Other, net	-315	'	'	-157	'	'	-457	-581
Total other expense, net	-315	'	'	-157	'	'	-457	-581
Income (loss) before taxes	0	'	'	0	'	'	0	0
Provision (benefit) for income taxes	0	'	'	0	'	'	0	0
Income (loss) before equity in net income of subsidiaries	0	'	'	0	'	'	0	0
Equity in net income (loss) of subsidiaries	-24,891	'	'	-16,779	'	'	-65,884	-33,074
Net income (loss)	-24,891	'	'	-16,779	'	'	-65,884	-33,074
Foreign currency translation adjustments	'	'	'	'	'	'	'	0
Other comprehensive income (loss), net of taxes	0	'	'	0	'	'	0	0
Comprehensive income (loss), net	($24,891)	'	'	($16,779)	'	'	($65,884)	($33,074)

CONSOLIDATING_GUARANTOR_AND_NO5

CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net income (loss)	($8,125)	$3,342
Net cash provided by (used in) operating activities	49,856	2,554
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Acquisition of property, plant and equipment	-54,859	-45,886
Acquired businesses, net of cash acquired	-62,306	0
Intercompany distributions	0	0
Investment purchases	-8,402	0
Proceeds from sale of investment	491	1,326
Net cash used in investing activities	-125,076	-44,560
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from issuance of common stock	584	0
Purchase of shares for treasury	-72,518	-25,689
Proceeds from long-term debt	682,913	303
Payments of long-term debt	-602,134	-12,842
Change in short-term borrowings	3,138	2,408
Financing costs	-10,928	-759
Purchase of ESOP shares	-10,000	0
Tax effect from exercise/vesting of equity awards, net	273	150
Dividend	-4,841	-4,384
Other, net	194	261
Net cash used in financing activities	-13,319	-40,552
CASH FLOWS FROM DISCONTINUED OPERATIONS:	'	'
Net cash used in discontinued operations	-1,018	-486
Effect of exchange rate changes on cash and equivalents	-1,136	-506
NET DECREASE IN CASH AND EQUIVALENTS	-90,693	-83,550
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	178,130	209,654
CASH AND EQUIVALENTS AT END OF PERIOD	87,437	126,104
Parent Company [Member]	'	'
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net income (loss)	-8,125	3,342
Net cash provided by (used in) operating activities	-10,966	-67,628
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Acquisition of property, plant and equipment	-672	-33
Acquired businesses, net of cash acquired	0	'
Intercompany distributions	10,000	10,000
Investment purchases	-8,402	'
Proceeds from sale of investment	0	0
Net cash used in investing activities	926	9,967
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from issuance of common stock	584	'
Purchase of shares for treasury	-72,518	-25,689
Proceeds from long-term debt	649,568	0
Payments of long-term debt	-597,613	-1,751
Change in short-term borrowings	0	0
Financing costs	-10,393	-759
Purchase of ESOP shares	-10,000	'
Tax effect from exercise/vesting of equity awards, net	273	150
Dividend	-9,841	-4,384
Other, net	194	261
Net cash used in financing activities	-49,746	-32,172
CASH FLOWS FROM DISCONTINUED OPERATIONS:	'	'
Net cash used in discontinued operations	0	0
Effect of exchange rate changes on cash and equivalents	0	0
NET DECREASE IN CASH AND EQUIVALENTS	-59,786	-89,833
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	68,994	125,093
CASH AND EQUIVALENTS AT END OF PERIOD	9,208	35,260
Guarantor Companies [Member]	'	'
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net income (loss)	32,818	16,571
Net cash provided by (used in) operating activities	-8,300	23,214
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Acquisition of property, plant and equipment	-45,749	-40,324
Acquired businesses, net of cash acquired	-1,000	'
Intercompany distributions	-10,000	-10,000
Investment purchases	0	'
Proceeds from sale of investment	298	1,172
Net cash used in investing activities	-56,451	-49,152
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from issuance of common stock	0	'
Purchase of shares for treasury	0	0
Proceeds from long-term debt	-253	303
Payments of long-term debt	-708	-772
Change in short-term borrowings	0	0
Financing costs	0	0
Purchase of ESOP shares	0	'
Tax effect from exercise/vesting of equity awards, net	0	0
Dividend	5,000	0
Other, net	54,869	14,661
Net cash used in financing activities	58,908	14,192
CASH FLOWS FROM DISCONTINUED OPERATIONS:	'	'
Net cash used in discontinued operations	0	0
Effect of exchange rate changes on cash and equivalents	0	0
NET DECREASE IN CASH AND EQUIVALENTS	-5,843	-11,746
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	25,343	34,782
CASH AND EQUIVALENTS AT END OF PERIOD	19,500	23,036
Non-Guarantor Companies [Member]	'	'
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net income (loss)	33,066	16,503
Net cash provided by (used in) operating activities	69,122	46,968
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Acquisition of property, plant and equipment	-8,438	-5,529
Acquired businesses, net of cash acquired	-61,306	'
Intercompany distributions	0	0
Investment purchases	0	'
Proceeds from sale of investment	193	154
Net cash used in investing activities	-69,551	-5,375
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from issuance of common stock	0	'
Purchase of shares for treasury	0	0
Proceeds from long-term debt	33,598	0
Payments of long-term debt	-3,813	-10,319
Change in short-term borrowings	3,138	2,408
Financing costs	-535	0
Purchase of ESOP shares	0	'
Tax effect from exercise/vesting of equity awards, net	0	0
Dividend	0	0
Other, net	-54,869	-14,661
Net cash used in financing activities	-22,481	-22,572
CASH FLOWS FROM DISCONTINUED OPERATIONS:	'	'
Net cash used in discontinued operations	-1,018	-486
Effect of exchange rate changes on cash and equivalents	-1,136	-506
NET DECREASE IN CASH AND EQUIVALENTS	-25,064	18,029
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	83,793	49,779
CASH AND EQUIVALENTS AT END OF PERIOD	58,729	67,808
Elimination [Member]	'	'
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net income (loss)	-65,884	-33,074
Net cash provided by (used in) operating activities	0	0
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Acquisition of property, plant and equipment	0	0
Acquired businesses, net of cash acquired	0	'
Intercompany distributions	0	0
Investment purchases	0	'
Proceeds from sale of investment	0	0
Net cash used in investing activities	0	0
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from issuance of common stock	0	'
Purchase of shares for treasury	0	0
Proceeds from long-term debt	0	0
Payments of long-term debt	0	0
Change in short-term borrowings	0	0
Financing costs	0	0
Purchase of ESOP shares	0	'
Tax effect from exercise/vesting of equity awards, net	0	0
Dividend	0	0
Other, net	0	0
Net cash used in financing activities	0	0
CASH FLOWS FROM DISCONTINUED OPERATIONS:	'	'
Net cash used in discontinued operations	0	0
Effect of exchange rate changes on cash and equivalents	0	0
NET DECREASE IN CASH AND EQUIVALENTS	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	0	0
CASH AND EQUIVALENTS AT END OF PERIOD	$0	$0