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Earnings (Loss) Per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Denominator:                      
Weighted-average common shares outstanding 111,332 [1] 110,826 [1] 110,553 110,358 110,171 112,334 109,992 107,613 110,769 110,041 112,456
Basic net income (loss) per share (in dollars per share) $ (0.14) [1] $ (0.52) [1] $ (0.29) $ (0.25) $ (0.26) $ 0.00 $ (0.10) $ (0.04) $ (1.21) $ (0.39) $ 1.34
Denominator:                      
Number of shares used in basic computation 111,332 [1] 110,826 [1] 110,553 110,358 110,171 112,334 109,992 107,613 110,769 110,041 112,456
Number of shares used in diluted computation 111,332 [1] 110,826 [1] 110,553 110,358 110,171 115,552 109,992 107,613 110,769 110,041 115,884
Diluted net income (loss) per share (in dollars per share) $ (0.14) [1] $ (0.52) [1] $ (0.29) $ (0.25) $ (0.26) $ 0.00 $ (0.10) $ (0.04) $ (1.21) $ (0.39) $ 1.30
CRCS
                      
Numerator:                      
Allocation of undistributed earnings                 $ 0 [2] $ (1,180) [2] $ 6,109 [2]
Denominator:                      
Weighted-average common shares outstanding                 0 [2] 4,788 [2] 4,552 [2]
Basic net income (loss) per share (in dollars per share)                 $ 0.00 [2] $ (0.25) [2] $ 1.34 [2]
Numerator:                      
Allocation of undistributed earnings for basic computation                 0 [2] (1,180) [2] 6,109 [2]
Reallocation of undistributed earnings                 0 [2] 0 [2] (181) [2]
Allocation of undistributed earnings for diluted computation                 0 [2] (1,180) [2] 5,928 [2]
Denominator:                      
Number of shares used in basic computation                 0 [2] 4,788 [2] 4,552 [2]
Dilutive potential shares from stock options, ESPP, convertible notes, CRI retention bonuses and nonvested equity stock and stock units                 0 [2] 0 [2] 0 [2]
Number of shares used in diluted computation                 0 [2] 4,788 [2] 4,552 [2]
Diluted net income (loss) per share (in dollars per share)                 $ 0.00 [2] $ (0.25) [2] $ 1.30 [2]
Common Stock
                      
Numerator:                      
Allocation of undistributed earnings                 (134,336) [3] (41,873) [3] 144,808 [3]
Denominator:                      
Weighted-average common shares outstanding                 110,769 [3] 107,024 [3] 107,904 [3]
Basic net income (loss) per share (in dollars per share)                 $ (1.21) [3] $ (0.39) [3] $ 1.34 [3]
Numerator:                      
Allocation of undistributed earnings for basic computation                 (134,336) [3] (41,873) [3] 144,808 [3]
Reallocation of undistributed earnings                 0 [3] 0 [3] 181 [3]
Allocation of undistributed earnings for diluted computation                 $ (134,336) [3] $ (41,873) [3] $ 144,989 [3]
Denominator:                      
Number of shares used in basic computation                 110,769 [3] 107,024 [3] 107,904 [3]
Dilutive potential shares from stock options, ESPP, convertible notes, CRI retention bonuses and nonvested equity stock and stock units                 0 [3] 0 [3] 3,428 [3]
Number of shares used in diluted computation                 110,769 [3] 107,024 [3] 111,332 [3]
Diluted net income (loss) per share (in dollars per share)                 $ (1.21) [3] $ (0.39) [3] $ 1.30 [3]
[1] The quarterly financial information includes $6.6 million related to restructuring charges in the quarter ended September 30, 2012 and$0.7 million related to restructuring charges in the quarter ended December 31, 2012. Refer to Note 16, "Restructuring Charges" of Notes to Consolidated Financial Statements of this Form 10-K.
[2] CRCS — Contingently Redeemable Common Stock
[3] Other CS — Common Stock other than CRCS