Annual report pursuant to Section 13 and 15(d)

International Revenues - Additional Information (Detail)

v2.4.1.9
International Revenues - Additional Information (Detail)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Geographic Areas Revenues From External Customers In Percentage [Abstract]      
Percentage of revenue related to fabricated structures for delivery outside U.S 10.00%gifi_EntityWideDisclosureOnGeographicAreasPercentOfRevenueFromExternalCustomersAttributedToForeignCountries 6.00%gifi_EntityWideDisclosureOnGeographicAreasPercentOfRevenueFromExternalCustomersAttributedToForeignCountries 9.00%gifi_EntityWideDisclosureOnGeographicAreasPercentOfRevenueFromExternalCustomersAttributedToForeignCountries