CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common stock:	Additional paid-in-capital:	Treasury stock:	Accumulated deficit:	Noncontrolling interest:
Balance at beginning of period at Dec. 31, 2020	$ 802,729	$ 1,983	$ 4,212,409	$ (102,774)	$ (3,311,184)	$ 2,295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock and restricted stock units, net		2	(2)
Shares withheld for employee taxes		(7)	(4,322)
Non-cash stock-based compensation expense			4,783
Issuance of common stock under Associate Stock Purchase Plan			224
Other, net			3
Net income (loss)	(108,303)				(108,285)	(18)
Balance at end of period at Mar. 31, 2021	695,107	$ 1,978	4,213,095	(102,774)	(3,419,469)	2,277
Balance at beginning of period (in shares) at Dec. 31, 2020		187,804,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under Associate Stock Purchase Plan (in shares)		43,000
Restricted stock and restricted stock units, net (in shares)		127,000
Shares withheld for employee taxes (in shares)		(744,000)
Balances at end of period (in shares) at Mar. 31, 2021		187,230,000
Balance at beginning of period at Dec. 31, 2021	699,623	$ 1,975	4,208,675	(102,774)	(3,410,474)	2,221
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock and restricted stock units, net		9	(9)
Shares withheld for employee taxes		(6)	(4,191)
Non-cash stock-based compensation expense			3,885
Issuance of common stock under Associate Stock Purchase Plan			0
Other, net			0
Net income (loss)	(100,032)				(100,013)	(19)
Balance at end of period at Mar. 31, 2022	$ 599,279	$ 1,978	$ 4,208,360	$ (102,774)	$ (3,510,487)	$ 2,202
Balance at beginning of period (in shares) at Dec. 31, 2021	186,957,793	186,958,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under Associate Stock Purchase Plan (in shares)		0
Restricted stock and restricted stock units, net (in shares)		925,000
Shares withheld for employee taxes (in shares)		(600,000)
Balances at end of period (in shares) at Mar. 31, 2022	187,283,273	187,283,000