Consolidated Statement Of Shareholders' Deficit - 3 months ended Mar. 31, 2016 - USD ($) shares in Thousands, $ in Thousands	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 - Warrant [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member] Shares - Warrant [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive (Loss) Income [Member] Shares - Warrant [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Shares - Warrant [Member]	Total
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
Net income						53,639				53,639
Common stock issued in connection with stock purchase/option plans		$ 3		3,328						3,331
Common stock issued in connection with stock purchase/option plans, Shares		276
Non-cash compensation				7,933						7,933
Settlement of convertible note hedges and common stock warrants, Amount
Settlement of convertible note hedges and common stock warrants, Shares
Repurchase and retirement of common stock, Amount		$ (5)				(50,007)				(50,012)
Repurchase and retirement of common stock, Shares		(507)
Foreign currency translation adjustments								60,693		60,693
BALANCE, Amount at Mar. 31, 2016		$ 1,255		$ 1,973,974		$ (3,164,437)		$ (441,352)		$ (1,630,560)
BALANCE, Shares at Mar. 31, 2016		125,512