Consolidated Statements Of Shareholders' Deficit - 3 months ended Mar. 31, 2017 - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member] Class A Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Total
BALANCE at Dec. 31, 2016	$ 1,210	$ 2,010,520	$ (3,637,467)	$ (370,184)	$ (1,995,921)
BALANCE, Shares at Dec. 31, 2016	121,004
Net income			37,598		37,598
Common stock issued in connection with stock purchase/option plans	$ 3	9,490			9,493
Common stock issued in connection with stock purchase/option plans, Shares	294
Non-cash compensation		9,470			9,470
Repurchase and retirement of common stock			(4,419)		(4,419)
Repurchase and retirement of common stock, Shares	(42)
Foreign currency translation adjustments				27,285	27,285
BALANCE at Mar. 31, 2017	$ 1,213	$ 2,029,480	$ (3,604,288)	$ (342,899)	$ (1,916,494)
BALANCE, Shares at Mar. 31, 2017	121,256