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Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Anticipated expenditures relating to completion of construction type contracts | $ 325.3 |
Earnest Money Deposits | 3.5 |
Rental expense | 0.7 | 0.6
Minimum annual rental commitments, remainder of 2013 | 2.0 |
Minimum annual rental commitments, 2014 | 3.0 |
Minimum annual rental commitments, 2015 | 1.9 |
Minimum annual rental commitments, 2016 | 2.1 |
Minimum annual rental commitments, 2017 | 2.1 |
Minimum annual rental commitments, thereafter | 16.3 |
Maximum [Member] | Partnership Interest [Member] |  |
Less than joint venture economic interest noted | 100.00% |
Non-Refundable [Member] |  |
Earnest Money Deposits | $ 3.0 |

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