Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2018	$ 399,589	$ 127	$ 161,593	$ (2,148)	$ 295,588	$ (55,571)
Balance (in shares) at Dec. 31, 2018		20,171,392
Net (loss) income	11,482				11,482
Other comprehensive income	3,717			3,717
Deferred compensation plan	20		(22)			42
Stock based compensation expenses	11		11
Shares issued under stock option plan	185		(22)		(5)	212
Shares issued under stock option plan (in shares)		17,822
Restricted share issuance/ Restricted share activity under stock incentive plans	(311)		(751)			440
Restricted share issuance/Restricted share activity under stock incentive plan (in shares)		38,890
Shares issued from direct stock sales	31		19			12
Shares issued from direct stock sales (in shares)		1,065
Shares repurchased	(15,147)					(15,147)
Shares repurchased (In Shares)		(515,977)
Common stock dividends declared	(3,788)				(3,788)
Balance at Mar. 31, 2019	395,789	$ 127	160,828	1,569	303,277	(70,012)
Balance (in shares) at Mar. 31, 2019		19,713,192
Balance at Dec. 31, 2019	426,167	$ 127	161,955	4,595	329,175	(69,685)
Balance (in shares) at Dec. 31, 2019		19,729,886
Net (loss) income	(22,482)				(22,482)
Other comprehensive income	7,473			7,473
Adoption of ASC 326 | ASC 326 [Member]	(2,566)				(2,566)
Deferred compensation plan			(94)			94
Deferred compensation plan (in shares)		7,524
Stock based compensation expenses	1,236		1,230			6
Capital stock issuance	526,875	$ 179	526,696
Capital stock issuance (in shares)		17,927,017
Vesting of incentive plans	(1,496)		(1,989)			493
Vesting of incentive plans (in shares)		39,548
Restricted share issuance/ Restricted share activity under stock incentive plans			198		(374)	176
Restricted share issuance/Restricted share activity under stock incentive plan (in shares)		13,349
Restricted share forfeitures (in shares)		(750)
Shares repurchased	(10,078)					(10,078)
Shares repurchased (In Shares)		(430,000)
Common stock dividends declared	(8,286)				(8,286)
Balance at Mar. 31, 2020	$ 916,843	$ 306	$ 687,996	$ 12,068	$ 295,467	$ (78,994)
Balance (in shares) at Mar. 31, 2020		37,286,574