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Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2019 | Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Current Fiscal Year End Date |  | --12-31 |  |  |  |
Proceeds from Collection of Notes Receivable | $ 9,500 |  |  |  |  |
Proceeds from Interest Received | 500 |  |  |  |  |
Amortization of Below Market Lease |  | $ 200 |  |  |  |
Capitalized interest |  | 13,600 | $ 15,200 | $ 18,200 |  |
Capitalized real estate taxes |  | 2,200 | 2,400 | 4,500 |  |
Outstanding notes receivable | $ 9,314 | $ 9,314 | $ 18,790 | $ 17,224 |  | $ 13,161
Weighted average interest rate on outstanding notes receivable |  | 4.00% | 4.00% |  |  |
Percentage Of Rental Revenue And Other Income From Leasing Of Apartment Homes |  | 99.00% | 99.00% | 99.00% |  |
Amortization of in-place leases |  | $ 9,400 | $ 1,300 |  |  |
Camden Summit Partnership L P [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest |  | 95.00% |  |  |  |
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest |  | 1.00% |  |  |  |
Conversion of Units, Cash |  | $ 14,415 |  |  |  |
Camden Operating L P [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest |  | 92.00% |  |  |  |
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest |  | 1.00% |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Operating Lease, Liability |  |  |  |  | $ 16,600 |

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