XML 99 R119.htm IDEA: XBRL DOCUMENT v2.4.1.9
Quarterly Financial Data (Unaudited) - Additional Information (Detail) (Subsequent Event [Member])
 0 Months Ended
Jan. 09, 2015
Shareholder
Class A Common Stock [Member]
  
Number of stockholders 413gef_NumberOfStockholders
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Class B Common Stock [Member]
  
Number of stockholders 102gef_NumberOfStockholders
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember