Accounting Policies (Details) (USD $) In Thousands, except Per Share data	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Stock options.
Antidilutive Securities Excluded from Computation of Earnings Per Share
Common equivalent shares (in shares)	20,589	20,993
Weighted-average exercise price (in dollars per share)	$ 32.43	$ 32.07
Convertible senior subordinated notes.
Antidilutive Securities Excluded from Computation of Earnings Per Share
Common equivalent shares (in shares)	8,192
Conversion price (in dollars per share)	$ 48.83
Unvested restricted stock and restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share
Common equivalent shares (in shares)	1,971	1,871

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph c

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- Definition

The weighted average price as of the balance-sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(a, b)

+ Details

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- Definition

The price per share of the conversion feature embedded in a debt instrument.

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