Debt - Consolidated Net Assets of Borrowers under the 2007 AMH Credit Agreement (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
AMH and Consolidated Subs
Net Assets of Consolidated Subsidiaries under the 2007 AMH Credit Agreement [Line Items]
Total Net Assets	$ (497,556)	[1]	$ (689,958)	[1]
Apollo Principal Holdings I
Net Assets of Consolidated Subsidiaries under the 2007 AMH Credit Agreement [Line Items]
Total Net Assets	1,450,945		1,570,336
Apollo Principal Holdings II
Net Assets of Consolidated Subsidiaries under the 2007 AMH Credit Agreement [Line Items]
Total Net Assets	115,052		167,844
Apollo Principal Holdings III
Net Assets of Consolidated Subsidiaries under the 2007 AMH Credit Agreement [Line Items]
Total Net Assets	516,555		661,106
Apollo Principal Holdings IV
Net Assets of Consolidated Subsidiaries under the 2007 AMH Credit Agreement [Line Items]
Total Net Assets	169,677		163,329
Apollo Principal Holdings V
Net Assets of Consolidated Subsidiaries under the 2007 AMH Credit Agreement [Line Items]
Total Net Assets	53,680		53,116
Apollo Principal holdings VI
Net Assets of Consolidated Subsidiaries under the 2007 AMH Credit Agreement [Line Items]
Total Net Assets	256,555		239,876
Apollo Principal Holdings VII
Net Assets of Consolidated Subsidiaries under the 2007 AMH Credit Agreement [Line Items]
Total Net Assets	116,502		99,250
Apollo Principal Holdings VIII
Net Assets of Consolidated Subsidiaries under the 2007 AMH Credit Agreement [Line Items]
Total Net Assets	33,430		16,784
Apollo Principal Holdings IX
Net Assets of Consolidated Subsidiaries under the 2007 AMH Credit Agreement [Line Items]
Total Net Assets	$ 75,419		$ 152,010

[1] Includes Apollo Management, L.P., Apollo Capital Management, L.P., Apollo International Management, L.P., AAA Holdings, L.P. and ST Management Holdings, LLC, which are consolidated by AMH.