CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY, (Unaudited) - 3 months ended Mar. 31, 2018 - USD ($)	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]
Balances at Dec. 31, 2017	$ 462,211,000	$ 531,000	$ 461,680,000	$ 0
Increase (Decrease) in Stockholders' Equity
Net income	(16,377,000)	0	0	(16,377,000)
Cash dividend declared	16,463,000	0	16,463,000	0
Issuance of common stock pursuant to public offerings, net	0	0	0	0
Issuance of common shares pursuant to stock based compensation plan	35,000	0	35,000	0
Amortization of stock based compensation	45,000	0	45,000	0
Balances at Mar. 31, 2018	$ 429,451,000	$ 531,000	$ 445,297,000	$ (16,377,000)