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Commitments and Contingencies (Details Textual) (USD $) | 0 Months Ended | 1 Months Ended |  |  |  |  |  |  |  |  |
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Dec. 09, 2010 lender | Mar. 31, 2012 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Jun. 30, 2012 | Dec. 31, 2011 | Jun. 30, 2013 South Edge guarantee [Member] | Jun. 06, 2011 South Edge guarantee [Member] | Oct. 26, 2011 South Edge [Member] JointVenture | Jun. 30, 2013 Summary Judgment Excluding Interest [Member] [Member] | Jun. 30, 2013 Summary Judgment Including Interest [Member] [Member] | Jun. 30, 2013 Summary Judgment Interest [Member]
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Reserved for litigation and asserted claims |  |  | $ 16,703,000 |  | $ 16,067,000 |  |  |  |  |  |  |  |
Joint venture ownership percentage |  |  |  |  |  |  |  | 3.53% |  |  |  |  |
Springing Repayment Guarantee_Original demand Letter |  |  |  |  |  |  |  |  | 13,200,000 |  |  |  |
Number of co-ventures in joint venture |  |  |  |  |  |  |  |  |  | 4 |  |  |
Litigation Judgment Amount |  |  |  |  |  |  |  |  |  |  | 15,053,857 | 15,753,344 | 699,487
Supersedeas Bond |  |  | 16,050,604 |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Warranty reserve |  | 21,705,000 | 21,844,000 | 21,384,000 | 22,064,000 | 21,243,000 | 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 |  |  |  |  |  |  |

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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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- Definition Amount of judgment awarded against the entity in respect of litigation. + References No definition available. + Details
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- Definition Number of co ventures in the joint venture. + References No definition available. + Details
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- Definition The number of lenders who filed a petition seeking to place the venture into an involuntary bankruptcy. + References No definition available. + Details
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- Definition Amount in original demand letter from lenders seeking to place joint venture into involuntary bankruptcy (June 2011) + References No definition available. + Details
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- Definition Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1),(c)(5) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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