Quarterly report pursuant to Section 13 or 15(d)

Geographic Information (Details)

v2.4.1.9
Geographic Information (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2014
Segment Reporting Information [Line Items]          
Revenue $ 1,624,495us-gaap_Revenues $ 1,581,590us-gaap_Revenues $ 4,616,832us-gaap_Revenues $ 4,566,306us-gaap_Revenues  
Inventories 138,458us-gaap_InventoryNet   138,458us-gaap_InventoryNet   150,944us-gaap_InventoryNet
Restricted and Nonrestricted Inventory, Net 186,572amrk_RestrictedandNonrestrictedInventoryNet   186,572amrk_RestrictedandNonrestrictedInventoryNet   175,554amrk_RestrictedandNonrestrictedInventoryNet
Assets 334,087us-gaap_Assets   334,087us-gaap_Assets   305,138us-gaap_Assets
Long term assets 11,392us-gaap_NoncurrentAssets   11,392us-gaap_NoncurrentAssets   9,815us-gaap_NoncurrentAssets
United States          
Segment Reporting Information [Line Items]          
Revenue 1,477,702us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
1,366,074us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
4,136,616us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
3,922,864us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
 
Inventories 146,378us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= country_US
  146,378us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= country_US
  159,145us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= country_US
Assets 291,814us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= country_US
  291,814us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= country_US
  285,092us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= country_US
Long term assets 11,316us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
  11,316us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
  9,726us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
Europe          
Segment Reporting Information [Line Items]          
Revenue 69,563us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
106,687us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
188,973us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
298,751us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Inventories 32,799us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
  32,799us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
  10,500us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
Assets 34,878us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
  34,878us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
  14,137us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
Long term assets 76us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
  76us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
  89us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
North America, excluding USA          
Segment Reporting Information [Line Items]          
Revenue 57,910us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= amrk_NorthAmericaexcludingUSAMember
78,978us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= amrk_NorthAmericaexcludingUSAMember
239,746us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= amrk_NorthAmericaexcludingUSAMember
256,246us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= amrk_NorthAmericaexcludingUSAMember
 
Inventories 4,144us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= amrk_NorthAmericaexcludingUSAMember
  4,144us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= amrk_NorthAmericaexcludingUSAMember
  4,091us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= amrk_NorthAmericaexcludingUSAMember
Assets 4,144us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= amrk_NorthAmericaexcludingUSAMember
  4,144us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= amrk_NorthAmericaexcludingUSAMember
  4,091us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= amrk_NorthAmericaexcludingUSAMember
Asia Pacific          
Segment Reporting Information [Line Items]          
Revenue 9,156us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
25,213us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
39,200us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
81,746us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Africa          
Segment Reporting Information [Line Items]          
Revenue 27us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_AfricaMember
12us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_AfricaMember
52us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_AfricaMember
12us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_AfricaMember
 
Australia          
Segment Reporting Information [Line Items]          
Revenue 10,137us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_AU
3,911us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_AU
12,243us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_AU
5,940us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_AU
 
South America          
Segment Reporting Information [Line Items]          
Revenue 0us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_SouthAmericaMember
715us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_SouthAmericaMember
2us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_SouthAmericaMember
747us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_SouthAmericaMember
 
Asia          
Segment Reporting Information [Line Items]          
Inventories 3,251us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
  3,251us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
  1,818us-gaap_InventoryNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
Assets $ 3,251us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
  $ 3,251us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
  $ 1,818us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember