The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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Significant Accounting Policies (Details) (USD $)	12 Months Ended			1 Months Ended	12 Months Ended
Significant Accounting Policies (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Mar. 31, 2009 GTL Injunction - FG Hemisphere [Member]	Dec. 31, 2009 GTL Injunction - FG Hemisphere [Member]
Accounting Policies [Abstract]
Percentage of interest in joint venture by the company	55.00%	55.00%	55.00%
Noncontrolling interest in joint venture	45.00%
Research and development costs included in selling, general and administrative expenses	$ 24,800,000	$ 11,800,000	$ 9,200,000
Site Contingency [Line Items]
Amounts under injunction				108,300,000	108,300,000
Restricted cash on deposit	$ 92,813,000	$ 68,096,000