Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member]	Total
Balance at Dec. 31, 2017	$ 8,000	$ 93,624,000	$ 206,845,000	$ (817,000)	$ 299,660,000
Balance (in shares) at Dec. 31, 2017	812,304
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income			45,527,000		45,527,000
Cash Dividends Declared on Common Stock			(11,151,000)		(11,151,000)
Repurchase of Common Stock		(31,152,000)			(31,152,000)
Repurchase of Common Stock (in shares)	(44,503)
Issuance of Common Stock		10,502,000			10,502,000
Issuance of Common Stock (in shares)	15,920
Change in Net Unrealized (Loss) Gain on Securities Available-for-Sale				(2,171,000)	(2,171,000)
Balance at Dec. 31, 2018	$ 8,000	72,974,000	241,221,000	(2,988,000)	311,215,000
Balance (in shares) at Dec. 31, 2018	783,721
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income			56,036,000		56,036,000
Cash Dividends Declared on Common Stock			(11,221,000)		(11,221,000)
Issuance of Common Stock		6,973,000			6,973,000
Issuance of Common Stock (in shares)	9,312
Change in Net Unrealized (Loss) Gain on Securities Available-for-Sale				6,293,000	6,293,000
Balance at Dec. 31, 2019	$ 8,000	79,947,000	286,036,000	3,305,000	$ 369,296,000
Balance (in shares) at Dec. 31, 2019	793,033				793,033
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income			58,734,000		$ 58,734,000
Cash Dividends Declared on Common Stock			(11,700,000)		(11,700,000)
Repurchase of Common Stock		(2,834,000)			(2,834,000)
Repurchase of Common Stock (in shares)	(3,910)
Issuance of Common Stock		403,000			403,000
Issuance of Common Stock (in shares)	523
Change in Net Unrealized (Loss) Gain on Securities Available-for-Sale				9,766,000	9,766,000
Balance at Dec. 31, 2020	$ 8,000	$ 77,516,000	$ 333,070,000	$ 13,071,000	$ 423,665,000
Balance (in shares) at Dec. 31, 2020	789,646				789,646