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		1	(1)
Shares withheld for employee taxes		(7)	(4,437)
Non-cash stock-based compensation expense			9,310
Issuance of common stock under Associate Stock Purchase Plan			437
Other, net			10
Net income (loss)	(191,907)				(191,870)	(37)
Balance at end of period at Jun. 30, 2021	616,135	$ 1,977	4,217,728	(102,774)	(3,503,054)	2,258
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)		73,000
Restricted stock and restricted stock units, net (in shares)		23,000
Shares withheld for employee taxes (in shares)		(761,000)
Balances at end of period (in shares) at Jun. 30, 2021		187,139,000
Balance at beginning of period at Mar. 31, 2021	695,107	$ 1,978	4,213,095	(102,774)	(3,419,469)	2,277
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock and restricted stock units, net		(1)	1
Shares withheld for employee taxes		0	(115)
Non-cash stock-based compensation expense			4,527
Issuance of common stock under Associate Stock Purchase Plan			213
Other, net			7
Net income (loss)	(83,604)				(83,585)	(19)
Balance at end of period at Jun. 30, 2021	616,135	$ 1,977	4,217,728	(102,774)	(3,503,054)	2,258
Balance at beginning of period (in shares) at Mar. 31, 2021		187,230,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under Associate Stock Purchase Plan (in shares)		30,000
Restricted stock and restricted stock units, net (in shares)		(104,000)
Shares withheld for employee taxes (in shares)		(17,000)
Balances at end of period (in shares) at Jun. 30, 2021		187,139,000
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)	(4,239)
Non-cash stock-based compensation expense			7,504
Issuance of common stock under Associate Stock Purchase Plan			0
Other, net			0
Net income (loss)	(184,315)				(184,431)	116
Balance at end of period at Jun. 30, 2022	$ 518,567	$ 1,978	4,211,931	(102,774)	(3,594,905)	2,337
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)		907,000
Shares withheld for employee taxes (in shares)		(609,000)
Balances at end of period (in shares) at Jun. 30, 2022	187,255,622	187,256,000
Balance at beginning of period at Mar. 31, 2022	$ 599,279	$ 1,978	4,208,360	(102,774)	(3,510,487)	2,202
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock and restricted stock units, net		0	0
Shares withheld for employee taxes		0	(48)
Non-cash stock-based compensation expense			3,619
Issuance of common stock under Associate Stock Purchase Plan			0
Other, net			0
Net income (loss)	(84,283)				(84,418)	135
Balance at end of period at Jun. 30, 2022	$ 518,567	$ 1,978	$ 4,211,931	$ (102,774)	$ (3,594,905)	$ 2,337
Balance at beginning of period (in shares) at Mar. 31, 2022		187,283,000
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)		(18,000)
Shares withheld for employee taxes (in shares)		(9,000)
Balances at end of period (in shares) at Jun. 30, 2022	187,255,622	187,256,000