Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Series C Preferred Stock [Member] Preferred Stock [Member]	Series C Preferred Stock [Member] Preferred Stock Including Additional Paid in Capital [Member]	Series C Preferred Stock [Member] Common Stock [Member]	Series C Preferred Stock [Member] Common Stock Including Additional Paid in Capital [Member]	Series C Preferred Stock [Member] Treasury Stock [Member]	Series C Preferred Stock [Member] Retained Earnings [Member]	Series C Preferred Stock [Member] AOCI Attributable to Parent [Member]	Series C Preferred Stock [Member]	Series D Preferred Stock [Member] Preferred Stock [Member]	Series D Preferred Stock [Member] Preferred Stock Including Additional Paid in Capital [Member]	Series D Preferred Stock [Member] Common Stock [Member]	Series D Preferred Stock [Member] Common Stock Including Additional Paid in Capital [Member]	Series D Preferred Stock [Member] Treasury Stock [Member]	Series D Preferred Stock [Member] Retained Earnings [Member]	Series D Preferred Stock [Member] AOCI Attributable to Parent [Member]	Series D Preferred Stock [Member]	Preferred Stock [Member]	Preferred Stock Including Additional Paid in Capital [Member]	Common Stock [Member]	Common Stock Including Additional Paid in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2016																			$ 2,818	$ 27,900	$ (2,114)	$ 29,960	$ (4,491)	$ 54,073
Net income																						4,277		4,277
Other comprehensive loss																							(164)	(164)
Stock compensation expense																				230				230
Exercise of stock options																			67	1,308				1,375
Issuance of stock																			73	1,601				1,674
Issuance of common stock for restricted stock awards, including tax benefit																			8	(8)
Reclassification of disproportionate tax effects																						863	(863)
Cash dividends declared on common stock																						(2,374)		(2,374)
Balance at Dec. 31, 2017																			2,966	31,031	(2,114)	32,726	(5,518)	59,091
Net income																						4,211		4,211
Other comprehensive loss																							(652)	(652)
Stock compensation expense																				269				269
Issuance of stock	$ 287	$ 2,582						$ 2,869	$ 134	$ 1,203						$ 1,337			524	15,112				15,636
Issuance of common stock for restricted stock awards, including tax benefit																			11	(11)
Cash dividends declared on common stock																						(2,662)		(2,662)
Cumulative effect of change in accounting principle for marketable equity securities, net of tax at Dec. 31, 2017																						187	(187)
Balance at January 1, 2018, as adjusted at Dec. 31, 2017																			2,966	31,031	(2,114)	32,913	(5,705)	59,091
Cash dividends declared on preferred stock						$ (64)		$ (64)						$ (27)		$ (27)
Balance at Dec. 31, 2018																	$ 421	$ 3,785	$ 3,501	$ 46,401	$ (2,114)	$ 34,371	$ (6,357)	$ 80,008