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Earnings (Loss) Per Share (Details) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Denominator:
Weighted-average common shares outstanding (in shares)	112,334	111,866	109,997	112,768
Basic net income (loss) per share (in dollars per share)	$ 0.00	$ (0.18)	$ (0.13)	$ 1.04
Denominator:
Number of shares used in basic computation (in shares)	112,334	111,866	109,997	112,768
Number of shares used in diluted computation (in shares)	115,552	111,866	109,997	116,347
Diluted net income (loss) per share (in dollars per share)	$ 0.00	$ (0.18)	$ (0.13)	$ 1.01
CRCS
Numerator:
Allocation of undistributed earnings	$ 11	$ (881)	$ (526)	$ 4,673
Denominator:
Weighted-average common shares outstanding (in shares)	4,788	4,788	4,788	4,472
Basic net income (loss) per share (in dollars per share)	$ 0.00	$ (0.18)	$ (0.11)	$ 1.04
Numerator:
Allocation of undistributed earnings for basic computation	11	(881)	(526)	4,673
Reallocation of undistributed earnings				(143)
Allocation of undistributed earnings for diluted computation	11	(881)	(526)	4,530
Denominator:
Number of shares used in basic computation (in shares)	4,788	4,788	4,788	4,472
Number of shares used in diluted computation (in shares)	4,788	4,788	4,788	4,472
Diluted net income (loss) per share (in dollars per share)	$ 0.00	$ (0.18)	$ (0.11)	$ 1.01
Other CS
Numerator:
Allocation of undistributed earnings	467	(19,695)	(13,811)	113,160
Denominator:
Weighted-average common shares outstanding (in shares)	109,784	107,078	105,963	108,296
Basic net income (loss) per share (in dollars per share)	$ 0.00	$ (0.18)	$ (0.13)	$ 1.04
Numerator:
Allocation of undistributed earnings for basic computation	467	(19,695)	(13,811)	113,160
Reallocation of undistributed earnings				143
Allocation of undistributed earnings for diluted computation	$ 467	$ (19,695)	$ (13,811)	$ 113,303
Denominator:
Number of shares used in basic computation (in shares)	109,784	107,078	105,963	108,296
Dilutive potential shares from stock options, ESPP, convertible notes, CRI retention bonuses and nonvested equity stock and stock units (in shares)	3,218			3,579
Number of shares used in diluted computation (in shares)	133,002	107,078	105,963	111,875
Diluted net income (loss) per share (in dollars per share)	$ 0.00	$ (0.18)	$ (0.13)	$ 1.01

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