Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

v2.4.1.9
Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Sep. 30, 2014
Inventory [Line Items]    
Total Inventories $ 58,539us-gaap_InventoryNet $ 25,469us-gaap_InventoryNet
Orange Groves [Member]    
Inventory [Line Items]    
Agricultural related inventory 52,139us-gaap_AgriculturalRelatedInventoryGrowingCrops
/ us-gaap_PublicUtilitiesInventoryAxis
= naics_ZZ111310
23,502us-gaap_AgriculturalRelatedInventoryGrowingCrops
/ us-gaap_PublicUtilitiesInventoryAxis
= naics_ZZ111310
Beef Cattle Ranching and Farming [Member]    
Inventory [Line Items]    
Agricultural related inventory 2,538us-gaap_AgriculturalRelatedInventoryGrowingCrops
/ us-gaap_PublicUtilitiesInventoryAxis
= naics_ZZ112111
1,022us-gaap_AgriculturalRelatedInventoryGrowingCrops
/ us-gaap_PublicUtilitiesInventoryAxis
= naics_ZZ112111
Nursery Inventory [Member]    
Inventory [Line Items]    
Other 1,876us-gaap_OtherInventory
/ us-gaap_PublicUtilitiesInventoryAxis
= alco_NurseryInventoryMember
516us-gaap_OtherInventory
/ us-gaap_PublicUtilitiesInventoryAxis
= alco_NurseryInventoryMember
Other Inventory [Member]    
Inventory [Line Items]    
Other $ 1,986us-gaap_OtherInventory
/ us-gaap_PublicUtilitiesInventoryAxis
= alco_OtherInventoryMember
$ 429us-gaap_OtherInventory
/ us-gaap_PublicUtilitiesInventoryAxis
= alco_OtherInventoryMember