CONDENSED CONSOLIDATED STATEMENT OF EQUITY (unaudited) (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balances, at beginning of period at Dec. 31, 2010	$ 1,059,997	$ 1,243	$ 1,904,144	$ (29,187)	$ (815,876)	$ (327)
Balances, at beginning of period (in shares) at Dec. 31, 2010	124,316,545	124,317,000
Compensation expense related to restricted stock and restricted stock unit grants	14,316	0	14,316	0	0	0
Net loss	(53,300)	0	0	0	(53,300)	0
Common stock issued in connection with an acquisition	1,538	1	1,537	0	0	0
Common stock issued in connection with an acquisition (in shares)		97,000
Equity component of convertible notes, net	76,801	0	76,801	0	0	0
Purchase of bond hedge	(77,007)	0	(77,007)	0	0	0
Issuance of warrants	45,066	0	45,066	0	0	0
Issuance of common stock under Associate Stock Purchase Plan	868	0	868	0	0	0
Issuance of common stock under Associate Stock Purchase Plan (in shares)		50,000
Restricted stock, net	0	20	(20)	0	0	0
Restricted stock, net (in shares)		1,975,000
Unrealized (loss) gain on marketable securities - restricted	(1,581)	0	0	0	0	(1,581)
Reclassification of net gains on derivatives into earnings	213	0	0	0	0	213
Purchase of treasury stock	(17,613)	0	0	(17,613)	0	0
Purchase of treasury stock (in shares)	1,217,100	(1,217,000)
Amortization of payments from settlement of forward interest rate swaps	282	0	0	0	0	282
Other	(194)	0	0	0	0	(194)
Balances, at end of period	$ 1,049,386	$ 1,264	$ 1,965,705	$ (46,800)	$ (869,176)	$ (1,607)
Balances, at end of period (in shares) at Sep. 30, 2011	125,221,682	125,222,000