Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands		Total	Common Stock		Retained Earnings	Accumulated Other Comprehensive (Loss) Gain
Beginning balance (in shares) at Dec. 31, 2018	[1]		16,946,622
Beginning balance at Dec. 31, 2018		$ 109,240	$ 58,624		$ 49,942	$ 674
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		(284)				(284)
Dividends payable		(1,869)			(1,869)
Restricted stock units released (in shares)			2,500
Restricted stock units released		0
Stock-based compensation expense		99	$ 99
Net Income		4,007			4,007
Ending balance (in shares) at Mar. 31, 2019	[2]		16,949,122
Ending balance at Mar. 31, 2019		111,193	$ 58,723		52,080	390
Beginning balance (in shares) at Dec. 31, 2018	[1]		16,946,622
Beginning balance at Dec. 31, 2018		109,240	$ 58,624		49,942	674
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		(979)
Net Income		12,276
Ending balance (in shares) at Sep. 30, 2019	[3]		16,953,744
Ending balance at Sep. 30, 2019		115,211	$ 58,896		56,620	(305)
Beginning balance (in shares) at Mar. 31, 2019	[2]		16,949,122
Beginning balance at Mar. 31, 2019		111,193	$ 58,723		52,080	390
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		(182)				(182)
Dividends payable		(1,865)			(1,865)
Restricted stock units released (in shares)			4,622
Restricted stock units released		0
Stock-based compensation expense		95	$ 95
Net Income		4,097			4,097
Ending balance (in shares) at Jun. 30, 2019	[4]		16,953,744
Ending balance at Jun. 30, 2019		113,338	$ 58,818		54,312	208
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		(513)				(513)
Dividends payable		(1,865)			(1,865)
Stock-based compensation expense		78	$ 78
Net Income		4,173			4,173
Ending balance (in shares) at Sep. 30, 2019	[3]		16,953,744
Ending balance at Sep. 30, 2019		115,211	$ 58,896		56,620	(305)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		(327)				(327)
Dividends payable		(1,868)			(1,868)
Restricted stock units released (in shares)			20,141
Restricted stock units released		0
Stock-based compensation expense		77	$ 77
Net Income		$ 2,895			2,895
Ending balance (in shares) at Dec. 31, 2019		16,973,885	16,973,885	[5]
Ending balance at Dec. 31, 2019		$ 115,988	$ 58,973		57,647	(632)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		458				458
Dividends payable		(1,867)			(1,867)
Restricted stock units released (in shares)			350
Restricted stock units released		0
Tax benefit from restricted stock units released		(1)	$ (1)
Stock-based compensation expense		78	$ 78
Net Income		2,754			2,754
Ending balance (in shares) at Mar. 31, 2020	[6]		16,974,235
Ending balance at Mar. 31, 2020		$ 117,410	$ 59,050		58,534	(174)
Beginning balance (in shares) at Dec. 31, 2019		16,973,885	16,973,885	[5]
Beginning balance at Dec. 31, 2019		$ 115,988	$ 58,973		57,647	(632)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		312
Net Income		$ 7,038
Ending balance (in shares) at Sep. 30, 2020		16,977,239	16,977,239
Ending balance at Sep. 30, 2020		$ 118,053	$ 59,289		59,084	(320)
Beginning balance (in shares) at Mar. 31, 2020	[6]		16,974,235
Beginning balance at Mar. 31, 2020		117,410	$ 59,050		58,534	(174)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		(227)				(227)
Dividends payable		(1,866)			(1,866)
Restricted stock units released (in shares)			3,004
Restricted stock units released		0
Stock-based compensation expense		131	$ 131
Net Income		2,012			2,012
Ending balance (in shares) at Jun. 30, 2020	[7]		16,977,239
Ending balance at Jun. 30, 2020		117,460	$ 59,181		58,680	(401)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		81				81
Dividends payable		(1,867)			(1,867)
Stock-based compensation expense		108	$ 108
Net Income		$ 2,271			2,271
Ending balance (in shares) at Sep. 30, 2020		16,977,239	16,977,239
Ending balance at Sep. 30, 2020		$ 118,053	$ 59,289		$ 59,084	$ (320)

[1] Excludes 59,217 unvested restricted shares

[2] Excludes 58,717 unvested restricted shares

[3] Excludes 55,713 unvested restricted shares

[4] Excludes 55,713 unvested restricted shares

[5] Excludes 35,572 unvested restricted shares

[6] Excludes 47,572 unvested restricted shares

[7] Excludes 44,568 unvested restricted shares