Parent Company Financial Information (Condensed Statements of Cash Flows, Parent Only) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 3,886	$ 3,391	$ 5,335	$ 3,118	$ 4,014	$ 4,206	$ 4,224	$ 3,754	$ 15,730	$ 16,198
Adjustments to reconcile net income to cash provided by operating activities:
Amortization of debt issuance costs									40
Stock-based compensation expense									263	149
Net decrease in other assets									(255)	2,304
Net increase (decrease) in other liabilities									2,317	(7,834)
Net cash provided by operating activities									18,430	13,743
Cash flows from investing activities:
Proceeds from maturities and principal payments of investment securities available for sale									45,329	35,447
Purchases of premises and equipment									(2,375)	(2,244)
Purchases of bank owned life insurance									(319)	(25,621)
Net cash (used in) investing activities									(280,080)	(45,678)
Cash flows from financing activities:
Increase in short-term borrowings									(176)	(59,586)
Proceeds from the issuance of subordinated debt									24,389
Common stock dividends paid									0	0
Exercise of stock options									3
Repurchase of shares for tax withholding on exercised options and vested restricted stock									(39)	(88)
Net cash provided by financing activities									353,596	59,681
Net increase in cash and cash equivalents									91,946	27,746
Cash and cash equivalents at beginning of period				94,971				67,225	94,971	67,225
Cash and cash equivalents at end of period	186,917				94,971				186,917	94,971
Parent Company [Member]
Cash flows from operating activities:
Net income									15,730	16,198
Adjustments to reconcile net income to cash provided by operating activities:
Equity in undistributed net income of subsidiaries									(16,957)	(16,568)
Amortization of debt issuance costs									40
Stock-based compensation expense									263	149
Gain on sale of subsidiary									152
Net decrease in other assets									(250)	(1,093)
Net increase (decrease) in other liabilities									1,485	(6,109)
Net cash provided by operating activities									159	(7,423)
Cash flows from investing activities:
Purchases of bank owned life insurance									(319)	(139)
Transfer to subsidiary										(571)
Net cash (used in) investing activities									(319)	(710)
Cash flows from financing activities:
Increase in short-term borrowings										(1,041)
Proceeds from the issuance of subordinated debt									24,389
Common stock dividends paid									(5,950)	(5,347)
Retirement of common stock									(9,112)	(4,452)
Exercise of stock options									3
Repurchase of shares for tax withholding on exercised options and vested restricted stock									(39)	(88)
Net cash provided by financing activities									9,291	(10,928)
Net increase in cash and cash equivalents									9,131	(19,061)
Cash and cash equivalents at beginning of period				$ 7,522				$ 26,583	7,522	26,583
Cash and cash equivalents at end of period	$ 16,653				$ 7,522				$ 16,653	7,522
Supplemental cash flow information:
Transfer of available for sale securities to banking subsidiary										$ 5,032