CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period Of Adoption, Adjustment	Preferred Stock	Common Stock	Additional Paid-in Capital	Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings Cumulative Effect, Period Of Adoption, Adjustment
Balance (in shares) at Dec. 31, 2018			0	12,784,444
Balance at Dec. 31, 2018	$ 215,259			$ 128	$ 141,128	$ (3,750)	$ 77,753
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,245						3,245
Shares issued under share-based compensation plans	13,010					13,010
Dividends declared	(2,087)						(2,087)
Shares issued under share-based compensation plans (in shares)				64,875
Shares issued under share-based compensation plans	0			$ 0	0
Share-based compensation	1,358				1,358
Balance (in shares) at Jun. 30, 2019			0	12,849,319
Balance at Jun. 30, 2019	230,785			$ 128	142,486	9,260	78,911
Balance (in shares) at Mar. 31, 2019			0	12,836,401
Balance at Mar. 31, 2019	217,916			$ 128	141,803	3,138	72,847
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	7,110						7,110
Shares issued under share-based compensation plans	6,122					6,122
Dividends declared	(1,046)						(1,046)
Shares issued under share-based compensation plans (in shares)				12,918
Shares issued under share-based compensation plans	0
Share-based compensation	683				683
Balance (in shares) at Jun. 30, 2019			0	12,849,319
Balance at Jun. 30, 2019	230,785			$ 128	142,486	9,260	78,911
Balance (in shares) at Dec. 31, 2019			0	14,414,821
Balance at Dec. 31, 2019	248,693	$ (25)		$ 144	167,677	10,281	70,591	$ (25)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(19,346)						(19,346)
Shares issued under share-based compensation plans	4,109					4,109
Dividends declared	(2,560)						(2,560)
Shares issued under share-based compensation plans (in shares)				88,589
Shares issued under share-based compensation plans	1			$ 1
Repurchases of common stock (in shares)				(800,235)
Repurchases of common stock	(10,000)			$ (8)			(9,992)
Share-based compensation	808				808
Balance (in shares) at Jun. 30, 2020			0	13,703,175
Balance at Jun. 30, 2020	221,680			$ 137	168,485	14,390	38,668
Balance (in shares) at Mar. 31, 2020			0	13,949,971
Balance at Mar. 31, 2020	239,174			$ 139	168,130	6,253	64,652
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(21,479)						(21,479)
Shares issued under share-based compensation plans	8,137					8,137
Dividends declared	(1,258)						(1,258)
Shares issued under share-based compensation plans (in shares)				29,856
Shares issued under share-based compensation plans	1			$ 1
Repurchases of common stock (in shares)				(276,652)
Repurchases of common stock	(3,250)			$ (3)			(3,247)
Share-based compensation	355				355
Balance (in shares) at Jun. 30, 2020			0	13,703,175
Balance at Jun. 30, 2020	$ 221,680			$ 137	$ 168,485	$ 14,390	$ 38,668