Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Total Stockholders' Equity	Common Stock Outstanding	Additional Paid-In Capital	Retained Earnings (Accumulated) Deficit	Treasury Stock	Noncontrolling Interest
Balance (in shares) at Dec. 31, 2018			48,116,379
Beginning balance at Dec. 31, 2018	$ 503,009	$ 503,009	$ 481	$ 833,810	$ (331,282)	$ 0	$ 0
Increase (Decrease) in Stockholders' Equity
Net proceeds from public offerings of common stock (in shares)			5,299,497
Net proceeds from public offerings of common stock	52,714	52,714	$ 53	52,661
Grants of restricted stock (in shares)			108,000
Grants of restricted stock	0		$ 1	(1)
Equity component of convertible senior unsecured notes	2,445	2,445		2,445
Offering costs	(430)	(430)		(430)
Vesting of restricted stock	564	564		564
Net income (loss)	70,699	70,699			70,699
Dividends on common stock	(64,540)	(64,540)		178	(64,718)
Balance (in shares) at Dec. 31, 2019			53,523,876
Ending balance at Dec. 31, 2019	564,461	564,461	$ 535	889,227	(325,301)	0	0
Increase (Decrease) in Stockholders' Equity
Net proceeds from public offerings of common stock (in shares)			6,034,741
Net proceeds from public offerings of common stock	22,357	22,357	$ 60	22,297
Exchange of convertible senior notes (in shares)			1,354,084
Exchange of convertible senior notes	3,588	3,588	$ 14	3,574
Offering costs	(371)	(371)		(371)
Proceeds from non-controlling interest, net of offering costs	2						2
Vesting of restricted stock	699	699		699
Treasury stock (in shares)			(100,000)
Treasury Stock	(578)					(578)
Net income (loss)	(328,346)	(328,354)			(328,354)		8
Dividends declared on non-controlling interest	(8)						(8)
Dividends on common stock	(6,690)	(6,690)		32	(6,722)
Balance (in shares) at Dec. 31, 2020			60,812,701
Ending balance at Dec. 31, 2020	255,114	255,112	$ 609	915,458	(660,377)	(578)	2
Increase (Decrease) in Stockholders' Equity
Equity contributions	12,138						12,138
Exchange of phantom stock to common stock (in shares)			47,212
Equity component of convertible senior unsecured notes	2,060	2,060		2,060
Offering costs	(70)	(70)		(70)
Vesting of restricted stock	619	619		619
Treasury stock (in shares)			(479,808)
Treasury Stock	(1,087)	(1,087)				(1,087)
Net income (loss)	(49,865)	(48,953)			(48,953)		(912)
Dividends declared on non-controlling interest	(8)						(8)
Dividends on common stock	(14,572)	(14,572)		79	(14,651)
Balance (in shares) at Dec. 31, 2021			60,380,105
Ending balance at Dec. 31, 2021	$ 204,329	$ 193,109	$ 609	$ 918,146	$ (723,981)	$ (1,665)	$ 11,220