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Commitments And Contingencies (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Number of consolidated projects under construction | 7 |  |
Anticipated expenditures relating to completion of construction type contracts | $ 240.6 |  |
Earnest Money Deposits | 0.6 |  |
Rental expense | 4.1 | $ 3.4 | $ 3.0
Minimum annual rental commitments, 2017 | 2.9 |  |
Minimum annual rental commitments, 2018 | 2.7 |  |
Minimum annual rental commitments, 2019 | 2.5 |  |
Minimum annual rental commitments, 2020 | 2.5 |  |
Minimum annual rental commitments, 2021 | 2.5 |  |
Minimum annual rental commitments, thereafter | $ 8.6 |  |
Partnership Interest [Member] | Maximum [Member] |  |  |
Less than joint venture economic interest noted | 100.00% |  |

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