CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Unearned Stock Grant Compensation [Member]	Treasury Stock [Member]	Total
Beginning Balance at Dec. 31, 2017	$ 55	$ 22,401	$ 57,495	$ 30,993	$ 9,751	$ (579)	$ (7,133)	$ 112,983
Cumulative effect of adoption of updated accounting guidance for equity financial instruments at January 1, 2018 (ASU 2016-01 [Member]) at Dec. 31, 2017	0	0	0	9,825	(9,825)	0	0	0
Reclassification of certain tax effects from accumulated other comprehensive income at January 1, 2018 (ASU 2018-02 [Member]) at Dec. 31, 2017	0	0	0	(2,100)	2,100	0	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	(5,024)	0	0	0	(5,024)
Other comprehensive income (loss), net of tax	0	0	0	0	(5,644)	0	0	(5,644)
Dividends on common stock	0	0	0	(407)	0	0	0	(407)
Dividends accrued on preferred stock	0	0	0	(99)	0	0	0	(99)
Restricted stock grants, net of forfeitures	0	0	(68)	0	0	115	(47)	0
Amortization of unearned compensation	0	0	0	0	0	77	0	77
Purchase of shares for treasury	0	0	0	0	0	0	(79)	(79)
Net shares acquired related to employee share-based compensation plans	0	0	0	0	0	0	(90)	(90)
Issuance of shares under stock plans	0	0	4	0	0	0	3	7
Ending Balance at Mar. 31, 2018	55	22,401	57,431	33,188	(3,618)	(387)	(7,346)	101,724
Beginning Balance at Dec. 31, 2018	55	22,401	57,414	37,208	(7,535)	(186)	(7,985)	101,372
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	4,162	0	0	0	4,162
Other comprehensive income (loss), net of tax	0	0	0	0	6,453	0	0	6,453
Dividends on common stock	0	0	0	(403)	0	0	0	(403)
Dividends accrued on preferred stock	0	0	0	(99)	0	0	0	(99)
Amortization of unearned compensation	0	0	0	0	0	58	0	58
Purchase of shares for treasury	0	0	0	0	0	0	(49)	(49)
Net shares acquired related to employee share-based compensation plans	0	0	0	0	0	0	(14)	(14)
Issuance of shares under stock plans	0	0	3	0	0	0	4	7
Ending Balance at Mar. 31, 2019	$ 55	$ 22,401	$ 57,417	$ 40,868	$ (1,082)	$ (128)	$ (8,044)	$ 111,487