XML 66 R50.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Debt - Narrative (Details 1) |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 USD ($) single_family_property | Dec. 31, 2014 USD ($) single_family_property | Dec. 31, 2014 USD ($) single_family_property | Dec. 31, 2014 USD ($) single_family_property | Dec. 31, 2014 USD ($) single_family_property property | Mar. 07, 2013 USD ($) | Feb. 29, 2016 | Sep. 30, 2015 USD ($) nonperforming_loan single_family_property | Mar. 31, 2015 USD ($) nonperforming_loan property | Nov. 30, 2014 USD ($) property | Sep. 30, 2014 USD ($) single_family_property | May. 31, 2014 USD ($) extension_option floating_rate_component property pass_through_certificate | Dec. 31, 2015 USD ($) single_family_property property | Dec. 31, 2014 USD ($) single_family_property | Dec. 31, 2013 USD ($) | Sep. 30, 2014 | Sep. 30, 2014 USD ($) | Sep. 30, 2014 property | Sep. 30, 2013 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from asset-backed securitizations |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,030,559,000 | $ 1,497,039,000 | $ 0 |  |  |  |
Number of properties | single_family_property | 34,599 | 34,599 | 34,599 | 34,599 | 34,599 |  |  |  |  |  |  |  | 38,780 | 34,599 |  |  |  |  |
Asset-backed securitizations | $ 1,519,390,000 | $ 1,519,390,000 | $ 1,519,390,000 | $ 1,519,390,000 | $ 1,519,390,000 |  |  |  |  |  |  |  | $ 2,530,210,000 | $ 1,519,390,000 |  |  |  |  |
Single-family properties | 5,710,671,000 | 5,710,671,000 | 5,710,671,000 | 5,710,671,000 | 5,710,671,000 |  |  |  |  |  |  |  | 6,289,938,000 | 5,710,671,000 |  |  |  |  |
Interest rate cap agreement | 14,000 | 14,000 | 14,000 | 14,000 | 14,000 |  |  |  |  |  |  |  | 0 | 14,000 |  |  |  |  |
Payments for purchase of certificates |  |  |  |  |  |  |  |  |  |  |  |  | 19,739,000 | 3,315,000 | $ 0 |  |  |  |
Credit facility | 207,000,000 | 207,000,000 | 207,000,000 | 207,000,000 | 207,000,000 |  |  |  |  |  |  |  | $ 0 | 207,000,000 |  |  |  |  |
2014-SFR 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |
Interest rate cap agreement strike rate |  |  |  |  |  |  |  |  |  |  |  | 3.85% |  |  |  |  |  |  |
Number of debt instrument extension options | extension_option |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |
Period of extension options |  |  |  |  |  |  |  |  |  |  |  | 12 months |  |  |  |  |  |  |
Asset-backed securitizations | $ 478,565,000 | $ 478,565,000 | $ 478,565,000 | $ 478,565,000 | $ 478,565,000 |  |  |  |  |  |  |  |  | $ 478,565,000 |  |  |  |  |
Effective percentage of interest rate cap agreements hedged as cash flow derivative |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |
Estimated amount of gain (loss) to be reclassified as increase to interest expense over next 12 months |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |
Interest rate | 1.79% | 1.79% | 1.79% | 1.79% | 1.79% |  |  |  |  |  |  |  | 1.97% | 1.79% |  |  |  |  |
2014-SFR 1 | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  |  |  |  |  | 0.25% |  |  |  |  |  |  |
2015-SFR 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset-backed securitizations | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |
Interest rate | 4.14% | 4.14% | 4.14% | 4.14% | 4.14% |  |  |  |  |  |  |  | 4.14% | 4.14% |  |  |  |  |
2014-SFR 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset-backed securitizations | $ 512,435,000 | $ 512,435,000 | $ 512,435,000 | $ 512,435,000 | $ 512,435,000 |  |  |  |  |  |  |  |  | $ 512,435,000 |  |  |  |  |
Interest rate | 4.42% | 4.42% | 4.42% | 4.42% | 4.42% |  |  |  |  |  |  |  | 4.42% | 4.42% |  |  |  |  |
2014-SFR 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset-backed securitizations | $ 528,390,000 | $ 528,390,000 | $ 528,390,000 | $ 528,390,000 | $ 528,390,000 |  |  |  |  |  |  |  |  | $ 528,390,000 |  |  |  |  |
Interest rate | 4.40% | 4.40% | 4.40% | 4.40% | 4.40% |  |  |  |  |  |  |  | 4.40% | 4.40% |  |  |  |  |
2015-SFR 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset-backed securitizations | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |
Interest rate | 4.36% | 4.36% | 4.36% | 4.36% | 4.36% |  |  |  |  |  |  |  | 4.36% | 4.36% |  |  |  |  |
Special Purpose Entity | Notes Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan amount |  |  |  |  |  |  |  |  |  |  |  | $ 481,000,000.0 |  |  |  |  |  |  |
Special Purpose Entity | 2014-SFR 1 | Notes Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative term of contract |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |
Number of floating rate loan components | floating_rate_component |  |  |  |  |  |  |  |  |  |  |  | 6 |  |  |  |  |  |  |
Ratio of interest and principal payments as a percentage of original principal amount |  |  |  |  |  |  |  |  |  |  |  | 0.083 |  |  |  |  |  |  |
Portion of principal amount for which monthly payment is required as a percent |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |
Number of properties | property |  |  |  |  |  |  |  |  |  |  |  |  | 3,852 |  |  |  |  |  |
Debt covenant, minimum debt yield percentage |  |  |  |  |  |  |  |  |  |  |  | 6.68% |  |  |  |  |  |  |
Special Purpose Entity | 2015-SFR 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan amount |  |  |  |  |  |  |  |  | $ 552,800,000.0 |  |  |  |  |  |  |  |  |  |
Debt instrument term |  |  |  |  |  |  |  |  | 30 years |  |  |  |  |  |  |  |  |  |
Number of classes of certificates | nonperforming_loan |  |  |  |  |  |  |  |  | 8 |  |  |  |  |  |  |  |  |  |
Asset-backed securitizations |  |  |  |  |  |  |  |  |  |  |  |  | $ 549,121,000 |  |  |  |  |  |
Weighted-average interest rate |  |  |  |  |  |  |  |  | 4.14% |  |  |  |  |  |  |  |  |  |
Special Purpose Entity | 2015-SFR 1 | Notes Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | property |  |  |  |  |  |  |  |  | 4,661 |  |  | 3,852 |  |  |  |  |  |  |
Single-family properties |  |  |  |  |  |  |  |  |  |  |  |  | 735,000,000 |  |  |  |  |  |
Special Purpose Entity | 2015-SFR 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan amount |  |  |  |  |  |  |  | $ 477,700,000 |  |  |  |  |  |  |  |  |  |  |
Debt instrument term |  |  |  |  |  |  |  | 30 years |  |  |  |  |  |  |  |  |  |  |
Number of classes of certificates | nonperforming_loan |  |  |  |  |  |  |  | 7 |  |  |  |  |  |  |  |  |  |  |
Proceeds from asset-backed securitizations |  |  |  |  |  |  |  | $ 477,700,000 |  |  |  |  |  |  |  |  |  |  |
Issuance costs for the sale of asset-backed securitizations |  |  |  |  |  |  |  | $ 11,300,000 |  |  |  |  |  |  |  |  |  |  |
Asset-backed securitizations |  |  |  |  |  |  |  |  |  |  |  |  | 476,920,000 |  |  |  |  |  |
Single-family properties |  |  |  |  |  |  |  |  |  |  |  |  | $ 681,400,000 |  |  |  |  |  |
Weighted-average interest rate |  |  |  |  |  |  |  | 4.36% |  |  |  |  |  |  |  |  |  |  |
Single family homes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | single_family_property | 34,599 | 34,599 | 34,599 | 34,599 | 34,599 |  |  |  |  |  |  |  | 38,780 | 34,599 |  |  |  |  |
Single-family properties | $ 5,710,671,000 | $ 5,710,671,000 | $ 5,710,671,000 | $ 5,710,671,000 | $ 5,710,671,000 |  |  |  |  |  |  |  | $ 6,289,938,000 | $ 5,710,671,000 |  |  |  |  |
Single family homes | 2014-SFR 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
LIBOR floor rate |  |  |  |  |  |  |  |  |  |  |  | 0.25% |  |  |  |  |  |  |
Number of debt instrument extension options | extension_option |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |
Period of extension options |  |  |  |  |  |  |  |  |  |  |  |  | 12 months |  |  |  |  |  |
Number of classes of certificates | pass_through_certificate |  |  |  |  |  |  |  |  |  |  |  | 7 |  |  |  |  |  |  |
Proceeds from asset-backed securitizations |  |  |  |  |  |  |  |  |  |  |  | $ 481,000,000 |  |  |  |  |  |  |
Issuance costs for the sale of asset-backed securitizations |  |  |  |  |  |  |  |  |  |  |  | $ 14,900,000 |  |  |  |  |  |  |
Number of properties | property |  |  |  |  |  |  |  |  |  |  |  | 3,852 |  |  |  |  |  |  |
Asset-backed securitizations |  |  |  |  |  |  |  |  |  |  |  |  | $ 473,755,000 |  |  |  |  |  |
Single-family properties |  |  |  |  |  |  |  |  |  |  |  |  | $ 606,900,000 |  |  |  |  |  |
Single family homes | 2014-SFR 1 | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest margin on reference rate |  |  |  |  |  |  |  |  |  |  |  | 1.54% |  |  |  |  |  |  |
Single family homes | 2015-SFR 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from asset-backed securitizations |  |  |  |  |  |  |  |  | $ 552,800,000.0 |  |  |  |  |  |  |  |  |  |
Issuance costs for the sale of asset-backed securitizations |  |  |  |  |  |  |  |  | $ 13,300,000 |  |  |  |  |  |  |  |  |  |
Single family homes | 2014-SFR 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 513,300,000.0 |  |
Debt instrument term |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |
Proceeds from asset-backed securitizations |  |  |  |  |  |  |  |  |  |  | $ 487,700,000 |  |  |  |  |  |  |  |
Issuance costs for the sale of asset-backed securitizations |  |  |  |  |  |  |  |  |  |  | $ 12,900,000 |  |  |  |  |  |  |  |
Number of properties |  |  |  |  |  |  |  |  |  |  | 4,487 |  | 4,487 |  |  |  |  | 4,487 |
Asset-backed securitizations |  |  |  |  |  |  |  |  |  |  |  |  | $ 507,305,000 |  |  |  |  |  |
Weighted-average interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.42% |  |  |
Minimum coverage ratio |  |  |  |  |  |  |  |  |  |  | 1.20 |  |  |  |  |  |  |  |
Period of debt service considered for debt coverage ratio |  |  |  |  |  |  |  |  |  |  | 12 months |  |  |  |  |  |  |  |
Payments for purchase of certificates |  |  |  |  |  |  |  |  |  |  | $ 25,700,000 |  |  |  |  |  |  |  |
Single family homes | 2014-SFR 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan amount |  |  |  |  |  |  |  |  |  | $ 528,400,000.0 |  |  |  |  |  |  |  |  |
Debt instrument term |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |
Issuance costs for the sale of asset-backed securitizations |  |  |  |  |  |  |  |  |  | $ 12,900,000 |  |  |  |  |  |  |  |  |
Number of properties | property |  |  |  |  |  |  |  |  |  | 4,503 |  |  | 4,503 |  |  |  |  |  |
Asset-backed securitizations |  |  |  |  |  |  |  |  |  |  |  |  | $ 523,109,000 |  |  |  |  |  |
Single-family properties |  |  |  |  |  |  |  |  |  |  |  |  | 729,800,000 |  |  |  |  |  |
Weighted-average interest rate |  |  |  |  |  |  |  |  |  | 4.40% |  |  |  |  |  |  |  |  |
Single family homes | Special Purpose Entity | 2015-SFR 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | single_family_property |  |  |  |  |  |  |  | 4,125 |  |  |  |  |  |  |  |  |  |  |
Estimate of Fair Value Measurement | 2014-SFR 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate cap agreement |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Estimate of Fair Value Measurement | 2014-SFR 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Single-family properties |  |  |  |  |  |  |  |  |  |  |  |  | $ 672,300,000 |  |  |  |  |  |
Ellington portfolio acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  | $ 126,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties treated as collateral |  | 583 |  |  | 583 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate | 4.06% | 4.06% | 4.06% | 4.06% | 4.06% |  |  |  |  |  |  |  |  | 4.06% |  |  |  |  |
Minimum debt service coverage ratio |  |  | 1.47 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ellington portfolio acquisition | Notes Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  | $ 51,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate | 3.00% | 3.00% | 3.00% | 3.00% | 3.00% |  |  |  |  |  |  |  | 3.18% | 3.00% |  |  |  |  |
Credit facility maximum borrowing capacity |  |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  | $ 800,000,000.0 |  |  |  |  |  | $ 800,000,000
Percentage used to calculate borrowing base |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Credit facility | $ 207,000,000 | $ 207,000,000 | $ 207,000,000 | $ 207,000,000 | $ 207,000,000 |  |  |  |  |  |  |  | $ 0 | $ 207,000,000 |  |  |  |  |
Minimum liquidity requirement for debt covenant |  |  |  |  |  | 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt covenant, minimum liquidity requirement for cash and cash equivalents |  |  |  |  |  | $ 7,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum leverage ratio |  |  |  |  |  | 1.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt covenant, minimum required tangible net worth |  |  |  |  |  | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Debt covenant, percentage of additional equity capital raised on or after September 30, 2013 that is used in calculation of tangible net worth |  |  |  |  |  | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Until March 2017 | Senior Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of variable rate basis |  |  |  |  |  | 30 day LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  | 2.75% |  |  |  |  |  |  | 2.75% |  |  |  |  |  |
March 2017 and Thereafter | Senior Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of variable rate basis |  |  |  |  |  | 30 day LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  | 3.125% |  |  |  |  |  |  | 3.125% |  |  |  |  |  |
Subsequent Events | Senior Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit extension period |  |  |  |  |  |  | 3 months |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Carrying value as of the balance sheet date, of debt obligations collateralized by single family properties. + References No definition available. + Details
Name: | amh_AssetBackedSecuritization
Namespace Prefix: | amh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the minimum required amount of liquidity in the form of cash and cash equivalents, as defined, pursuant to the financial covenants contained in the debt agreement. + References No definition available. + Details
Name: | amh_DebtInstrumentCovenantLiquidityCashAndCashEquivalentRequiredAmount
Namespace Prefix: | amh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the minimum required amount of liquidity, as defined, pursuant to the financial covenants contained in the debt agreement. + References No definition available. + Details
Name: | amh_DebtInstrumentCovenantLiquidityRequiredAmount
Namespace Prefix: | amh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the minimum required percentage of tangible net worth, as defined, pursuant to the financial covenants contained in the debt agreement. + References No definition available. + Details
Name: | amh_DebtInstrumentCovenantMinimumTangibleNetWorth
Namespace Prefix: | amh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the percentage of capital raised subsequent to a specified date which is used to compute the required tangible net worth pursuant to the covenants contained in the debt agreement. + References No definition available. + Details
Name: | amh_DebtInstrumentCovenantPercentageOfAdditionalCapitalAppliedToTangibleNetWorthCalculation
Namespace Prefix: | amh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the maximum permitted leverage ratio, as defined, pursuant to the financial covenants contained in the debt agreement. + References No definition available. + Details
Name: | amh_DebtInstrumentLeverageRatio
Namespace Prefix: | amh_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum debt service coverage ratio, as defined, pursuant to the financial covenants contained in the debt agreement. + References No definition available. + Details
Name: | amh_DebtInstrumentMinimumCoverageRatio
Namespace Prefix: | amh_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the ratio of monthly principal payment of loan. + References No definition available. + Details
Name: | amh_DebtInstrumentMonthlyPrincipalPaymentRatio
Namespace Prefix: | amh_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of extension options for debt instrument. + References No definition available. + Details
Name: | amh_DebtInstrumentNumberOfExtensionOptions
Namespace Prefix: | amh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage portion of principal amount of loan for which monthly payment is required. + References No definition available. + Details
Name: | amh_DebtInstrumentPercentagePortionOfPrincipalAmountForWhichMonthlyPaymentIsRequired
Namespace Prefix: | amh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period of extension options for debt instrument. + References No definition available. + Details
Name: | amh_DebtInstrumentPeriodOfExtensionOptions
Namespace Prefix: | amh_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the effective percentage of interest rate cap agreements hedged as cash flow derivative. + References No definition available. + Details
Name: | amh_EffectivePercentageOfInterestRateCapAgreementCashFlowHedgedByDerivatives
Namespace Prefix: | amh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of the lower of cost or fair value of the reporting entity's leased and un-leased properties which is used to compute the borrowing base under the line of credit. + References No definition available. + Details
Name: | amh_LineOfCreditPercentageUsedToCalculateBorrowingBase
Namespace Prefix: | amh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line of Credit Facility, Extension Period + References No definition available. + Details
Name: | amh_LineofCreditFacilityExtensionPeriod
Namespace Prefix: | amh_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the London interbank offered rate, floor. + References No definition available. + Details
Name: | amh_LondonInterbankOfferedRateFloor
Namespace Prefix: | amh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum debt service coverage ration. + References No definition available. + Details
Name: | amh_MinimumDebtServiceCoverageRatio
Namespace Prefix: | amh_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of minimum debt yield required to be maintained by the borrower. + References No definition available. + Details
Name: | amh_MinimumDebtYieldPercentageRequiredToBeMaintained
Namespace Prefix: | amh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of classes of certificates for which note was exchanged. + References No definition available. + Details
Name: | amh_NumberOfClassesOfCertificates
Namespace Prefix: | amh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of floating rate components of loan. + References No definition available. + Details
Name: | amh_NumberOfFloatingRateLoanComponents
Namespace Prefix: | amh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of properties treated as collateral and first priority mortgage for the debt. + References No definition available. + Details
Name: | amh_NumberOfPropertiesTreatedAsCollateral
Namespace Prefix: | amh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period of debt service considered for debt coverage ratio. + References No definition available. + Details
Name: | amh_PeriodOfDebtServiceConsideredForDebtCoverageRatio
Namespace Prefix: | amh_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees). + References No definition available. + Details
Name: | us-gaap_DebtIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13495-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313 + Details
Name: | us-gaap_DerivativeAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract. + References No definition available. + Details
Name: | us-gaap_DerivativeCapInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
Name: | us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
Name: | us-gaap_LineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin. + References No definition available. + Details
Name: | us-gaap_LoansReceivableBasisSpreadOnVariableRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average interest rate of long-term debt outstanding. + References No definition available. + Details
Name: | us-gaap_LongtermDebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Proceeds from securitizations of receivables treated as collateralized borrowings, which are classified as financing transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromAccountsReceivableSecuritization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: 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(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_RealEstateInvestmentPropertyNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Repayments of securitizations of receivables treated as collateralized borrowings, which are classified as financing transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfAccountsReceivableSecuritization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DebtSecurityAxis=amh_AssetBackedSecuritizationsMay2014SecuritizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=amh_AssetBackedSecuritizationsFebruary2015SecuritizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=amh_AssetBackedSecuritizationsSeptember2014SecuritizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=amh_AssetBackedSecuritizationsNovember2014SecuritizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=amh_AssetBackedSecuritizationsSeptember2015SecuritizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=amh_SpecialPurposeEntityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=us-gaap_NotesPayableOtherPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=amh_SingleFamilyHomesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=amh_EllingtonPortfolioAcquisitonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=amh_SeniorSecuredRevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=amh_UntilMarchTwoThousandAndSeventeenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=amh_AfterMarchTwoThousandAndSeventeenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |