Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands		Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total
Balance at beginning of period at Dec. 31, 2020		$ 138	$ 35,004	$ 541,448	$ 53,151		$ 629,741
Net income				74,627			74,627
Stock issued under Stock Option Plan			3,310			$ 1,615	4,925
Common cash dividends declared	[1]			(18,851)			(18,851)
Purchase of the Company's common stock						(39,123)	(39,123)
Other comprehensive income (loss)					(20,392)		(20,392)
Reclassification of treasury stock per Maryland law		(7)		(37,501)		37,508
Balance at ending of period (CECL adoption) at Dec. 31, 2021				(14,175)			(14,175)
Balance at ending of period at Dec. 31, 2021		131	38,314	545,548	32,759		616,752
Net income				75,948			75,948
Stock issued under Stock Option Plan			4,131			3,564	7,695
Common cash dividends declared	[2]			(19,347)			(19,347)
Purchase of the Company's common stock						(61,847)	(61,847)
Other comprehensive income (loss)					(86,114)		(86,114)
Reclassification of treasury stock per Maryland law		(9)		(58,274)		58,283
Balance at ending of period at Dec. 31, 2022		122	42,445	543,875	(53,355)		533,087
Net income				67,800			67,800
Stock issued under Stock Option Plan			1,875			630	2,505
Common cash dividends declared	[3]			(19,111)			(19,111)
Purchase of the Company's common stock						(23,326)	(23,326)
Other comprehensive income (loss)					10,874		10,874
Reclassification of treasury stock per Maryland law		(4)		(22,692)		$ 22,696
Balance at ending of period at Dec. 31, 2023		$ 118	$ 44,320	$ 569,872	$ (42,481)		$ 571,829

[1] $1.40 per share total dividends.

[2] $1.56 per share total dividends.

[3] $1.60 per share total dividends.