CONDENSED CONSOLIDATED STATEMENT OF EQUITY (Unaudited) (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]
Balances at beginning of period at Dec. 31, 2011
Retrospective adjustment for adoption of accounting policy	$ (5,731)	$ 0	$ 0	$ 0	$ (5,731)
Net income	(66,467)
Net income at Jan. 01, 2012 (as previously reported [Member])	(65,645)
Balances at end of period at Dec. 31, 2012 (as previously reported [Member])	1,002,717	1,267	1,997,946	(46,800)	(949,696)
Balances at end of period at Dec. 31, 2012	996,986	1,267	1,997,946	(46,800)	(955,427)
Balances at end of period - shares (in shares) at Dec. 31, 2012	126,689,545
Compensation expense related to restricted stock grants	6,894	0	6,894	0	0
Net income	3,558	0	0	0	3,558
Issuance of common stock under Associate Stock Purchase Plan	366	0	366	0	0
Issuance of common stock under Associate Stock Purchase Plan - shares (in shares)	15,000
Restricted stock, net	10	10	0	0	0
Restricted stock, net - shares (in shares)	966,000
Other	55	0	55	0	0
Balances at end of period at Mar. 31, 2013	$ 1,007,869	$ 1,277	$ 2,005,261	$ (46,800)	$ (951,869)
Balances at end of period - shares (in shares) at Mar. 31, 2013	127,669,561