Commitments and Contingencies (Details Textual) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2012 sqft	Dec. 31, 2011	Dec. 31, 2007
Commitments and Contingencies (Textual) [Abstract]
Land Subject to Ground Leases	55,047
Commitments and Contingencies (Additional Textual) [Abstract]
Change in warranty reserve for disclosure purposes only	$ 1,400,000
Expiration date of reconsidered corporate headquarters lease	Jun. 30, 2019
Percentage change in warranty claims used as a threshold for disclosure	10.00%
Cash Payments For Related Claims		8,000,000	28,000,000
Warranty Reserve		10,000,000
Increase in warranty reserve	1,487,000
Sublease [Member]
Commitments and Contingencies (Textual) [Abstract]
Land Subject to Ground Leases	55,047
Contract Termination [Member]
Commitments and Contingencies (Textual) [Abstract]
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation for remainder of 2012	800,000
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation for 2013	1,700,000
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation for 2014	1,700,000
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation for 2015	1,700,000
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation for 2016	1,800,000
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation, thereafter	4,500,000
Minimum receipts remaining under the Company's existing subleases for remainder of 2012	700,000
Minimum receipts remaining under the Company's existing subleases for 2013	1,300,000
Minimum receipts remaining under the Company's existing subleases for 2014	1,000,000
Minimum receipts remaining under the Company's existing subleases, thereafter	$ 0
Minimum [Member]
Commitments and Contingencies (Textual) [Abstract]
Expiration period of existing subleases	2012
Maximum [Member]
Commitments and Contingencies (Textual) [Abstract]
Expiration period of existing subleases	2014
Residential use [Member]
Commitments and Contingencies (Textual) [Abstract]
Warranty period	25 years
Residential use [Member] | Transcend product [Member]
Commitments and Contingencies (Textual) [Abstract]
Warranty period	25 years
Residential use [Member] | Enhance product [Member]
Commitments and Contingencies (Textual) [Abstract]
Warranty period	20 years
Commercial use [Member]
Commitments and Contingencies (Textual) [Abstract]
Warranty period	10 years
Commercial use [Member] | Transcend and Enhance product [Member]
Commitments and Contingencies (Textual) [Abstract]
Warranty period	10 years