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Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Anticipated expenditures relating to completion of construction type contracts | $ 331.0 |  | $ 331.0 |
Earnest Money Deposits | 2.3 |  | 2.3 |
Rental expense | 0.7 | 0.6 | 1.4 | 1.3
Minimum annual rental commitments, remainder of 2013 | 1.4 |  | 1.4 |
Minimum annual rental commitments, 2014 | 2.9 |  | 2.9 |
Minimum annual rental commitments, 2015 | 2.5 |  | 2.5 |
Minimum annual rental commitments, 2016 | 2.3 |  | 2.3 |
Minimum annual rental commitments, 2017 | 2.2 |  | 2.2 |
Minimum annual rental commitments, thereafter | 15.2 |  | 15.2 |
Maximum [Member] | Partnership Interest [Member] |  |  |  |
Less than joint venture economic interest noted | 100.00% |  | 100.00% |
Non-Refundable [Member] |  |  |  |
Earnest Money Deposits | $ 2.0 |  | $ 2.0 |

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