CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands		Stockholders' Equity, Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Other Comprehensive Income (Loss)	Treasury Stock
Equity Balance at Dec. 31, 2017		$ 471,662	$ 141	$ 28,203	$ 442,077	$ 1,241	$ 0
Net Income		13,466	0	0	13,466	0	0
Stock issued under Stock Option Plan		704	0	421	0	0	283
Common dividends declared,	[1]	(3,951)	0	0	(3,951)	0	0
Reclassification of stranded tax effects resulting from change in Federal income tax rate		0	0	0	(272)	272	0
Other comprehensive gain (loss)		(1,881)	0	0	0	(1,881)	0
Reclassification of Treasury Stock per Maryland Law		0	0	0	283	0	(283)
Equity Balance at Mar. 31, 2018		480,000	141	28,624	451,603	(368)	0
Equity Balance at Dec. 31, 2018		531,977	142	30,121	492,087	9,627	0
Net Income		17,612	0	0	17,612	0	0
Stock issued under Stock Option Plan		1,272	0	795	0	0	477
Common dividends declared,	[2]	(15,146)	0	0	(15,146)	0	0
Other comprehensive gain (loss)		8,769	0	0	0	8,769	0
Reclassification of Treasury Stock per Maryland Law		0	0	0	(372)	0	372
Equity Balance at Mar. 31, 2019		543,635	142	30,916	494,181	18,396	0
Purchase of the Company's common stock		$ (849)	$ 0	$ 0	$ 0	$ 0	$ (849)

[1] $0.28 per share

[2] $1.07 per share