Non-Recourse Property Debt and Credit Agreement - Scheduled Principal Amortization and Maturity Payments for Non-Recourse Property Debt (Details) - Aimco Real Estate $ in Thousands	Dec. 31, 2018 USD ($)
Amortization
2019	$ 77,791
2020	79,592
2021	69,995
2022	64,991
2023	55,450
Maturities
2019	168,554
2020	78,930
2021	611,039
2022	283,629
2023	337,871
Thereafter	2,109,158
Total	3,937,000
Loans maturing in 2021 that may be prepaid without penalty	$ 246,500

Long term debt amortization of principal in next twelve months.

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Long term debt amortization of principal in next year three.

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Long term debt amortization of principal in year five.

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Long term debt amortization of principal in year four.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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