The unamortized amount of current and long-term liabilities that an Entity assumes in consideration for the estimated fair value of the Entity's share of buildings in the build out of leased facilities plus any tenant improvement allowance received from landlords. As the Entity retains sufficient continuing involvement following the completion of construction, for accounting purposes, the Entity is treated as the owner of the leased facilities and to record an imputed financing obligation for its obligation to the legal owners.

No definition available.

Commitments and Contingencies (Details) (USD $)	12 Months Ended		1 Months Ended				1 Months Ended	12 Months Ended			12 Months Ended		1 Months Ended			1 Months Ended		1 Months Ended		1 Months Ended		1 Months Ended	12 Months Ended				1 Months Ended
Commitments and Contingencies (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010	Jul. 31, 2009 5% Convertible Senior Notes due 2014	Dec. 31, 2011 5% Convertible Senior Notes due 2014 M	Dec. 31, 2010 5% Convertible Senior Notes due 2014	Jun. 30, 2009 5% Convertible Senior Notes due 2014	Dec. 31, 2009 MT SPE, LLC, Original agreement squarefoot	Dec. 31, 2011 MT SPE, LLC, Original agreement	Dec. 31, 2010 MT SPE, LLC, Original agreement	Dec. 15, 2009 MT SPE, LLC, Original agreement M option Y	Dec. 31, 2011 Sunnyvale Facility	Dec. 31, 2010 Sunnyvale Facility	Nov. 30, 2011 MT SPE, LLC, Amended squarefoot	Dec. 31, 2011 MT SPE, LLC, Amended	Nov. 04, 2011 MT SPE, LLC, Amended M	Mar. 31, 2010 Fogg-Brecksville Development Co., Original squarefoot	Mar. 08, 2010 Fogg-Brecksville Development Co., Original M	Oct. 31, 2011 Amended Fogg-Brecksville Development Co., Expansion A squarefoot	Oct. 02, 2011 Amended Fogg-Brecksville Development Co., Expansion A	Oct. 31, 2011 Amended Fogg-Brecksville Development Co., Expansion B squarefoot	Oct. 02, 2011 Amended Fogg-Brecksville Development Co., Expansion B	Oct. 31, 2011 Ohio Facility squarefoot	Dec. 31, 2011 Ohio Facility	Dec. 31, 2010 Ohio Facility	Dec. 31, 2011 Fogg-Brecksville Development Co. Amended	Oct. 02, 2011 Fogg-Brecksville Development Co. Amended extension M	Nov. 30, 2011 Metropolitan Life Insurance squarefoot	Feb. 01, 2012 Metropolitan Life Insurance M
Lease Commitments
Office space under lease (in square feet)																7,000
Lease term (in months)										120																		75
Rent abatement period after the lease commencement date (in months)										6					5
Initial annual base rent amount										$ 3,700,000					$ 1,100,000													$ 900,000
Base rent amount for the 10th year										4,800,000
Final year number of the lease for which the annual base rent is disclosed (in years)										10
Number of options										2
Period for extension of lease (in months)										60							60
Period for termination of lease (in months)										84
Capitalized property plant and equipment														6,200,000											1,200,000
Total reimbursement receivable under lease agreement										9,100,000					1,700,000
Reimbursement received	8,800,000	292,000						8,800,000	300,000
Interest expense related to imputed financing obligation											3,200,000	400,000
Interest expense related to imputed financing obligation																							100,000	29,000
Long-term imputed financing obligation	43,793,000	27,899,000																					2,000,000	800,000
Imputed financing obligation classified under current and long-term obligations											41,800,000	27,300,000
Threshold till which annual base rent can be increased															1,300,000													1,000,000
Number of extensions to be constructed																										2
Lease Term after Completion of Expansions (in months)																										84
Annual base rent upon completion of expansion																			600,000		800,000
Percentage increase in annual base rent																										2.00%
2014 Notes, outstanding	172,500,000	172,500,000		172,500,000	172,500,000	150,000,000
Total space under lease (in square feet)							125,000						31,000			25,000		11,000		15,000		51,000					26,000
Warehouse space under lease (in square feet)																18,000
Additional borrowings on debt instrument			22,500,000
Unamortized discount	$ 39,007,000	$ 51,000,000		$ 39,007,000	$ 51,000,000
Debt discount remaining amortization period (in months)				30