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Mortgage Loans on Real Estate (Mortgage Loan Portfolio Summarized by Geographic Region and Property Type) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	$ 2,457,721us-gaap_LoansReceivableCommercialRealEstate	$ 2,607,698us-gaap_LoansReceivableCommercialRealEstate	$ 2,658,883us-gaap_LoansReceivableCommercialRealEstate
Percent	100.00%ael_PercentOfMortgageLoans	100.00%ael_PercentOfMortgageLoans
Office [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	484,585us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember	590,414us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember
Percent	19.70%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember	22.60%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember
Medical Office [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	88,275us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = ael_MortgageLoansMedicalOfficePropertyTypeMember	125,703us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = ael_MortgageLoansMedicalOfficePropertyTypeMember
Percent	3.60%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = ael_MortgageLoansMedicalOfficePropertyTypeMember	4.80%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = ael_MortgageLoansMedicalOfficePropertyTypeMember
Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	711,775us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember	711,364us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember
Percent	29.00%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember	27.30%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember
Industrial/Warehouse [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	649,425us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = ael_MortgageLoansIndustrialAndWarehousePropertyTypeMember	673,449us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = ael_MortgageLoansIndustrialAndWarehousePropertyTypeMember
Percent	26.40%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = ael_MortgageLoansIndustrialAndWarehousePropertyTypeMember	25.80%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = ael_MortgageLoansIndustrialAndWarehousePropertyTypeMember
Hotel [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	30,640us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_HotelMember	61,574us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_HotelMember
Percent	1.30%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_HotelMember	2.40%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_HotelMember
Apartment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	335,087us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_ApartmentBuildingMember	291,823us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_ApartmentBuildingMember
Percent	13.60%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_ApartmentBuildingMember	11.20%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_ApartmentBuildingMember
Mixed Use/Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	157,934us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OtherPropertyMember	153,371us-gaap_LoansReceivableCommercialRealEstate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OtherPropertyMember
Percent	6.40%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OtherPropertyMember	5.90%ael_PercentOfMortgageLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OtherPropertyMember
East [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	701,638us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_EastUnitedStatesRegionMember	765,717us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_EastUnitedStatesRegionMember
Percent	28.50%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_EastUnitedStatesRegionMember	29.40%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_EastUnitedStatesRegionMember
Middle Atlantic [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	166,249us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_MiddleAtlanticUnitedStatesRegionMember	156,489us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_MiddleAtlanticUnitedStatesRegionMember
Percent	6.80%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_MiddleAtlanticUnitedStatesRegionMember	6.00%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_MiddleAtlanticUnitedStatesRegionMember
Mountain [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	279,075us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_MountainUnitedStatesRegionMember	356,246us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_MountainUnitedStatesRegionMember
Percent	11.40%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_MountainUnitedStatesRegionMember	13.70%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_MountainUnitedStatesRegionMember
New England [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	12,280us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_NewEnglandUnitedStatesRegionMember	21,324us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_NewEnglandUnitedStatesRegionMember
Percent	0.50%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_NewEnglandUnitedStatesRegionMember	0.80%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_NewEnglandUnitedStatesRegionMember
Pacific [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	302,307us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_PacificUnitedStatesRegionMember	317,431us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_PacificUnitedStatesRegionMember
Percent	12.30%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_PacificUnitedStatesRegionMember	12.20%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_PacificUnitedStatesRegionMember
South Atlantic [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	471,849us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_SouthAtlanticUnitedStatesRegionMember	483,852us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_SouthAtlanticUnitedStatesRegionMember
Percent	19.20%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_SouthAtlanticUnitedStatesRegionMember	18.50%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_SouthAtlanticUnitedStatesRegionMember
West North Central [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	349,028us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_WestNorthCentralUnitedStatesRegionMember	351,794us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_WestNorthCentralUnitedStatesRegionMember
Percent	14.20%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_WestNorthCentralUnitedStatesRegionMember	13.50%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_WestNorthCentralUnitedStatesRegionMember
West South Central [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal outstanding	$ 175,295us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_WestSouthCentralUnitedStatesRegionMember	$ 154,845us-gaap_LoansReceivableCommercialRealEstate / us-gaap_StatementGeographicalAxis = ael_WestSouthCentralUnitedStatesRegionMember
Percent	7.10%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_WestSouthCentralUnitedStatesRegionMember	5.90%ael_PercentOfMortgageLoans / us-gaap_StatementGeographicalAxis = ael_WestSouthCentralUnitedStatesRegionMember

X

- Definition

Represents the specific geographic distribution or property type distribution amount as a percentabe of the total amortzed cost of mortgage loans.

+ References

No definition available.

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- Definition

Amount before allowance of commercial loans issued to businesses to acquire, develop, construct, improve, or refinance land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5066-111524



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph a

-Article 9



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(a))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.1(c))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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