CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY, (Unaudited) - USD ($)	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]
Balances at Dec. 31, 2016	$ 332,779,000	$ 330,000	$ 332,449,000	$ 0
Increase (Decrease) in Stockholders' Equity
Net income	2,007,000	0	0	2,007,000
Cash dividend declared	(70,717,000)	0	(68,710,000)	(2,007,000)
Issuance of common stock pursuant to public offerings, net	197,607,000	200,000	197,407,000	0
Issuance of common shares pursuant to stock based compensation plan	262,000	1,000	261,000	0
Amortization of stock based compensation	273,000	0	273,000	0
Balances at Dec. 31, 2017	$ 462,211,000	531,000	461,680,000	0
Common Stock Shares Outstanding, Beginning Balance at Dec. 31, 2016	32,963,000
Increase (Decrease) in Stockholders' Equity
Stock Issued During Period Shares New Issues	20,045,000
Stock Issued During Period Shares Share Based Compensation	54,000
Common Stock Shares Outstanding, Ending Balance at Dec. 31, 2017	53,062,000
Increase (Decrease) in Stockholders' Equity
Net income	$ (44,387,000)	0	0	(44,387,000)
Cash dividend declared	(55,814,000)	0	(55,814,000)	0
Issuance of common shares pursuant to stock based compensation plan	293,000	0	293,000	0
Amortization of stock based compensation	199,000	0	199,000	0
Balances at Dec. 31, 2018	$ 336,079,000	491,000	379,975,000	(44,387,000)
Increase (Decrease) in Stockholders' Equity
Stock Issued During Period Shares Share Based Compensation	49,000
Stock Repurchased and Retired During Period, Shares	(3,979,000)
Common Stock Shares Outstanding, Ending Balance at Dec. 31, 2018	49,132,423
Increase (Decrease) in Stockholders' Equity
Net income	$ 24,265,000	0	0	24,265,000
Cash dividend declared	(54,421,000)	0	(54,421,000)	0
Issuance of common stock pursuant to public offerings, net	92,314,000	145,000	92,169,000	0
Issuance of common shares pursuant to stock based compensation plan	179,000	0	179,000	0
Amortization of stock based compensation	115,000	0	115,000	0
Stock Repurchased and Retired During Period, Value	(3,024,000)	(5,000)	(3,019,000)	0
Balances at Dec. 31, 2019	$ 395,507,000	$ 631,000	$ 414,998,000	$ (20,122,000)
Increase (Decrease) in Stockholders' Equity
Stock Issued During Period Shares New Issues	14,377,000
Stock Issued During Period Shares Share Based Compensation	23,000
Stock Repurchased and Retired During Period, Shares	(470,000)
Common Stock Shares Outstanding, Ending Balance at Dec. 31, 2019	63,061,781