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Earnings (Loss) Per Share (Details) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Denominator:
Weighted-average common shares outstanding (in shares)	109,992	113,321	108,809	113,227
Basic net income (loss) per share (in dollars per share)	$ (0.10)	$ (0.11)	$ (0.14)	$ 1.22
Denominator:
Number of shares used in basic computation (in shares)	109,992	113,321	108,809	113,227
Number of shares used in diluted computation (in shares)	109,992	113,321	108,809	117,434
Diluted net income (loss) per share (in dollars per share)	$ (0.10)	$ (0.11)	$ (0.14)	$ 1.18
CRCS
Numerator:
Allocation of undistributed earnings	$ (461)	$ (528)	$ (652)	$ 5,271
Denominator:
Weighted-average common shares outstanding (in shares)	4,788	4,788	4,788	4,312
Basic net income (loss) per share (in dollars per share)	$ (0.10)	$ (0.11)	$ (0.14)	$ 1.22
Numerator:
Allocation of undistributed earnings for basic computation	(461)	(528)	(652)	5,271
Reallocation of undistributed earnings				(189)
Allocation of undistributed earnings for diluted computation	(461)	(528)	(652)	5,082
Denominator:
Number of shares used in basic computation (in shares)	4,788	4,788	4,788	4,312
Number of shares used in diluted computation (in shares)	4,788	4,788	4,788	4,312
Diluted net income (loss) per share (in dollars per share)	$ (0.10)	$ (0.11)	$ (0.14)	$ 1.18
Other CS
Numerator:
Allocation of undistributed earnings	(10,124)	(11,962)	(14,163)	133,138
Denominator:
Weighted-average common shares outstanding (in shares)	105,204	108,533	104,021	108,915
Basic net income (loss) per share (in dollars per share)	$ (0.10)	$ (0.11)	$ (0.14)	$ 1.22
Numerator:
Allocation of undistributed earnings for basic computation	(10,124)	(11,962)	(14,163)	133,138
Reallocation of undistributed earnings				189
Allocation of undistributed earnings for diluted computation	$ (10,124)	$ (11,962)	$ (14,163)	$ 133,327
Denominator:
Number of shares used in basic computation (in shares)	105,204	108,533	104,021	108,915
Dilutive potential shares from stock options, ESPP, Convertible notes and nonvested equity stock and stock units (in shares)				4,207
Number of shares used in diluted computation (in shares)	105,204	108,533	104,021	113,122
Diluted net income (loss) per share (in dollars per share)	$ (0.10)	$ (0.11)	$ (0.14)	$ 1.18

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