COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Disclosure Text Block Supplement [Abstract]
Net Capital Cost Value	$ 5,000
Obligation Under Consent Order	0
Net Capital Cost Value In Proposed Remedial Action Plan	10,000
Loss Contingency Claim Asserted	$ 0

Amount of net capital cost value in Proposed Remedial Action Plan as of the reporting date.

No definition available.

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Namespace Prefix:	gff_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant