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Commitments and Contingencies (Details Textual) (USD $) | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |
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Mar. 31, 2012 | Dec. 31, 2013 lender | Dec. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2012 | Dec. 31, 2013 South Edge guarantee [Member] | Dec. 31, 2012 South Edge guarantee [Member] | Sep. 30, 2012 South Edge guarantee [Member] | Jun. 06, 2011 South Edge guarantee [Member] | Oct. 26, 2011 South Edge [Member] JointVenture | Dec. 31, 2013 Summary Judgment Including Interest [Member] [Member] | Dec. 31, 2013 Summary Judgment Interest [Member] | Dec. 31, 2013 Summary Judgment Excluding Interest [Member] [Member]
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sublease income |  | $ 1,600,000 | $ 2,000,000 | $ 2,300,000 |  |  |  |  |  |  |  |  |  |  |
Rent expense |  | 6,400,000 | 5,500,000 | 6,100,000 |  |  |  |  |  |  |  |  |  |  |
Reserved for litigation and asserted claims |  | 16,463,000 | 16,067,000 |  |  |  |  |  |  | 8,700,000 |  |  |  |  |
Joint venture ownership percentage |  |  |  |  |  | 3.53% |  |  |  |  |  |  |  |  |
Number of co-ventures in joint venture |  |  |  |  |  |  |  |  |  |  |  | 4 |  |  |
Maximum pro rata exposure under the guarantee |  | 13,243,000 | 13,462,000 |  |  | 13,243,000 | [1] | 13,243,000 | [1] |  |  |  |  |  |
Supersedeas Bond |  | 16,050,604 |  |  |  |  |  |  |  |  |  |  |  |  |
Litigation Judgment Amount |  |  |  |  |  |  |  |  |  |  |  |  | 15,753,344 | 699,487 | 15,053,857
Springing Repayment Guarantee_Original Demand Letter |  |  |  |  |  |  |  |  |  |  | 13,200,000 |  |  |  |
Warranty reserve |  | 21,971,000 | 22,064,000 | 23,136,000 |  |  |  |  |  |  |  |  |  |  |
Number of lenders filing petition for involuntary bankruptcy |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |
Amount requested in demand for arbitration related to alleged breaches | 13,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional amount requested in demand for arbitration related to pro rata future infrastructure improvement costs |  |  |  |  | $ 9,800,000 |  |  |  |  |  |  |  |  |  |
[1] | As discussed in Note 13, although we have a reserve for the amounts we believe are appropriate, we dispute the enforceability of this guarantee, and ultimate resolution of this matter will be addressed through litigation and/or arbitration.

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- Definition The pro-rata share of alleged future infrastructure improvement costs to be incurred by the joint venture. + References No definition available. + Details
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