CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares	Cumulative Common Distributions	Additional Paid in Capital	Cumulative Net Income Available for Common Shareholders	Cumulative Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020		164,823,833
Beginning balance at Dec. 31, 2020	$ 2,102,790	$ 1,648	$ (5,628,746)	$ 4,550,385	$ 3,180,263	$ (760)
Increase (Decrease) in Shareholders' Equity
Net income (loss)	(194,990)				(194,990)
Common share grants	380			380
Distributions	(1,648)		(1,648)
Ending balance (in shares) at Mar. 31, 2021		164,823,833
Ending balance at Mar. 31, 2021	1,906,532	$ 1,648	(5,630,394)	4,550,765	2,985,273	(760)
Beginning balance (in shares) at Dec. 31, 2020		164,823,833
Beginning balance at Dec. 31, 2020	2,102,790	$ 1,648	(5,628,746)	4,550,385	3,180,263	(760)
Increase (Decrease) in Shareholders' Equity
Net income (loss)	(286,100)
Equity in unrealized gains of investees	0
Ending balance (in shares) at Jun. 30, 2021		164,857,754
Ending balance at Jun. 30, 2021	1,814,651	$ 1,649	(5,632,042)	4,551,641	2,894,163	(760)
Beginning balance (in shares) at Mar. 31, 2021		164,823,833
Beginning balance at Mar. 31, 2021	1,906,532	$ 1,648	(5,630,394)	4,550,765	2,985,273	(760)
Increase (Decrease) in Shareholders' Equity
Net income (loss)	(91,110)				(91,110)
Equity in unrealized gains of investees	0
Common share grants (in shares)		49,000
Common share grants	1,067	$ 1		1,066
Common share repurchases and forfeitures (in shares)		(15,079)
Common share repurchases and forfeitures	(190)			(190)
Distributions	(1,648)		(1,648)
Ending balance (in shares) at Jun. 30, 2021		164,857,754
Ending balance at Jun. 30, 2021	1,814,651	$ 1,649	(5,632,042)	4,551,641	2,894,163	(760)
Beginning balance (in shares) at Dec. 31, 2021		165,092,333
Beginning balance at Dec. 31, 2021	1,555,306	$ 1,651	(5,635,342)	4,552,558	2,635,660	779
Increase (Decrease) in Shareholders' Equity
Net income (loss)	(119,822)
Equity in unrealized gains of investees	4					4
Common share grants	462			462
Common share forfeitures (in shares)		(800)
Distributions	(1,651)		(1,651)
Ending balance (in shares) at Mar. 31, 2022		165,091,533
Ending balance at Mar. 31, 2022	1,434,299	$ 1,651	(5,636,993)	4,553,020	2,515,838	783
Beginning balance (in shares) at Dec. 31, 2021		165,092,333
Beginning balance at Dec. 31, 2021	1,555,306	$ 1,651	(5,635,342)	4,552,558	2,635,660	779
Increase (Decrease) in Shareholders' Equity
Net income (loss)	(108,472)
Equity in unrealized gains of investees	50
Ending balance (in shares) at Jun. 30, 2022		165,138,455
Ending balance at Jun. 30, 2022	1,444,872	$ 1,651	(5,638,644)	4,553,848	2,527,188	829
Beginning balance (in shares) at Mar. 31, 2022		165,091,533
Beginning balance at Mar. 31, 2022	1,434,299	$ 1,651	(5,636,993)	4,553,020	2,515,838	783
Increase (Decrease) in Shareholders' Equity
Net income (loss)	11,350
Equity in unrealized gains of investees	46					46
Common share grants (in shares)		49,000
Common share grants	836			836
Common share repurchases and forfeitures (in shares)		(2,078)
Common share repurchases and forfeitures	(8)			(8)
Distributions	(1,651)		(1,651)
Ending balance (in shares) at Jun. 30, 2022		165,138,455
Ending balance at Jun. 30, 2022	$ 1,444,872	$ 1,651	$ (5,638,644)	$ 4,553,848	$ 2,527,188	$ 829