Consolidated Statements Of Shareholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock [Member] Shares - Hedge [Member] Class A Common Stock [Member]	Common Stock [Member] Shares - Warrant [Member] Class A Common Stock [Member]	Common Stock [Member] Class A Common Stock [Member]	Additional Paid-In Capital [Member] Shares - Hedge [Member]	Additional Paid-In Capital [Member] Shares - Warrant [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Shares - Hedge [Member]	Shares - Warrant [Member]	Total
BALANCE, Amount at Dec. 31, 2012			$ 1,269			$ 3,111,107	$ (2,462,176)	$ 2,791			$ 652,991
BALANCE, Shares at Dec. 31, 2012			126,933,000
Net loss							(55,909)				(55,909)
Common stock issued in connection with stock purchase/option plans			$ 7			10,198					10,205
Common stock issued in connection with stock purchase/option plans, Shares			740,000
Non-cash stock compensation						17,422					17,422
Adjustment associated with the acquisition of noncontrolling interest						5,703					5,703
Settlement of convertible notes, Amount			$ 4			(321,925)					(321,921)
Settlement of convertible note hedges and common stock warrants, Amount		$ 4		$ 182,856	$ (97,915)				$ 182,856	$ (97,911)
Settlement of convertible note hedges and common stock warrants, Shares	(82,000)	402,000	439,000
Foreign currency translation adjustments								(36,470)			(36,470)
BALANCE, Amount at Dec. 31, 2013			$ 1,284			2,907,446	(2,518,085)	(33,679)			356,966
BALANCE, Shares at Dec. 31, 2013			128,432,000
Net loss							(24,295)				(24,295)
Common stock issued in connection with stock purchase/option plans			$ 7			7,741					7,748
Common stock issued in connection with stock purchase/option plans, Shares			696,000
Non-cash stock compensation						22,999					22,999
Settlement of convertible notes, Amount			$ 117			9,450					9,567
Settlement of convertible notes, Shares			11,742,000
Settlement of convertible note hedges and common stock warrants, Amount	$ (117)			$ 124	(884,985)				$ 7	(884,985)
Settlement of convertible note hedges and common stock warrants, Shares	(11,737,000)	1,000
Foreign currency translation adjustments								(148,807)			(148,807)
BALANCE, Amount at Dec. 31, 2014			$ 1,291			2,062,775	(2,542,380)	(182,486)			(660,800)
BALANCE, Shares at Dec. 31, 2014			129,134,000
Net loss							(175,656)				(175,656)
Common stock issued in connection with stock purchase/option plans			$ 6			21,604					21,610
Common stock issued in connection with stock purchase/option plans, Shares			591,000
Non-cash stock compensation						29,208					29,208
Settlement of convertible note hedges and common stock warrants, Amount					$ (150,874)					$ (150,874)
Repurchase and retirement of common stock, Amount			$ (40)				(450,033)				(450,073)
Repurchase and retirement of common stock, Shares			(3,982,000)
Foreign currency translation adjustments								(319,559)			(319,559)
BALANCE, Amount at Dec. 31, 2015			$ 1,257			$ 1,962,713	$ (3,168,069)	$ (502,045)			$ (1,706,144)
BALANCE, Shares at Dec. 31, 2015			125,743,000