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Commitments And Contingencies (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Number of Operating properties Acquired | 3 |  |
Number of consolidated projects under construction | 6 |  |
Anticipated expenditures relating to completion of construction type contracts | $ 335.2 |  |
Earnest Money Deposits | 2.9 |  |
Increase (Decrease) in Earnest Money Deposits Outstanding | 0.4 |  |
Rental expense | 3.8 | $ 4.0 | $ 4.1
Minimum annual rental commitments, 2019 | 2.9 |  |
Minimum annual rental commitments, 2020 | 3.0 |  |
Minimum annual rental commitments, 2021 | 3.1 |  |
Minimum annual rental commitments, 2022 | 2.7 |  |
Minimum annual rental commitments, 2023 | 2.6 |  |
Minimum annual rental commitments, thereafter | $ 4.5 |  |
Partnership Interest [Member] | Maximum [Member] |  |  |
Less than joint venture economic interest noted | 100.00% |  |

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- Definition A deposit made by a purchaser of real estate to evidence good faith. It is customary for a buyer to give the seller earnest money at the time a sales contract is signed. The earnest money generally is credited to the down payment at closing, which is applied at closing as a component of payment against the purchase price. + References No definition available. + Details
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