CONDENSED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Total	Common Stock	Preferred Stock	Additional Paid in Capital	Retained Earnings
Balance at beginning of period at Dec. 31, 2017	$ 413,023	$ 534	$ 0	$ 329,993	$ 82,496
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	178,694
Dividends paid ($0.05 per share)	(2,685)				(2,685)
Stock compensation	198			198
Common Shares issued	0
Other	(4,320)			(4,320)
Balance at end of period at Mar. 31, 2018	$ 584,910	$ 534	$ 0	$ 325,871	$ 258,505