Earnings (Loss) Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Denominator:
Weighted-average common shares outstanding	113,217	112,640	112,183	111,599	111,332	110,826	110,553	110,358	112,415	110,769	110,041
Basic net income (loss) per share (in dollars per share)	$ (0.09)	$ (0.05)	$ (0.07)	$ (0.09)	$ (0.14)	$ (0.52)	$ (0.29)	$ (0.25)	$ (0.30)	$ (1.21)	$ (0.39)
Denominator:
Number of shares used in basic computation	113,217	112,640	112,183	111,599	111,332	110,826	110,553	110,358	112,415	110,769	110,041
Number of shares used in diluted computation	113,217	112,640	112,183	111,599	111,332	110,826	110,553	110,358	112,415	110,769	110,041
Diluted net income (loss) per share (in dollars per share)	$ (0.09)	$ (0.05)	$ (0.07)	$ (0.09)	$ (0.14)	$ (0.52)	$ (0.29)	$ (0.25)	$ (0.30)	$ (1.21)	$ (0.39)
CRCS
Numerator:
Allocation of undistributed earnings									$ 0	$ 0	$ (1,180)
Denominator:
Weighted-average common shares outstanding									0	0	4,788
Basic net income (loss) per share (in dollars per share)									$ 0.00	$ 0.00	$ (0.25)
Numerator:
Allocation of undistributed earnings for basic computation									0	0	(1,180)
Reallocation of undistributed earnings									0	0	0
Allocation of undistributed earnings for diluted computation									0	0	(1,180)
Denominator:
Number of shares used in basic computation									0	0	4,788
Dilutive potential shares from stock options, ESPP, convertible notes, CRI retention bonuses and nonvested equity stock and stock units									0	0	0
Number of shares used in diluted computation									0	0	4,788
Diluted net income (loss) per share (in dollars per share)									$ 0.00	$ 0.00	$ (0.25)
Other CS
Numerator:
Allocation of undistributed earnings									(33,748)	(134,336)	(41,873)
Denominator:
Weighted-average common shares outstanding									112,415	110,769	107,024
Basic net income (loss) per share (in dollars per share)									$ (0.30)	$ (1.21)	$ (0.39)
Numerator:
Allocation of undistributed earnings for basic computation									(33,748)	(134,336)	(41,873)
Reallocation of undistributed earnings									0	0	0
Allocation of undistributed earnings for diluted computation									$ (33,748)	$ (134,336)	$ (41,873)
Denominator:
Number of shares used in basic computation									112,415	110,769	107,024
Dilutive potential shares from stock options, ESPP, convertible notes, CRI retention bonuses and nonvested equity stock and stock units									0	0	0
Number of shares used in diluted computation									112,415	110,769	107,024
Diluted net income (loss) per share (in dollars per share)									$ (0.30)	$ (1.21)	$ (0.39)