Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended												12 Months Ended
		Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	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, 2021	Dec. 31, 2020	Dec. 31, 2019	Feb. 04, 2021	Dec. 31, 2018
Equity, Class of Treasury Stock [Line Items]
Stockholders' equity increase														$ 31,800
Shareholders' equity		$ 205,729				$ 173,911				$ 160,709				205,729	$ 173,911	$ 160,709		$ 138,488
Net income		$ 9,746	$ 9,459	$ 8,418	$ 8,496	$ 7,345	$ 5,760	$ 5,171	$ 5,368	$ 6,120	$ 5,959	$ 5,834	$ 5,740	36,119	23,644	23,653
Treasury stock purchased, at cost														(4,191)	(7,442)
Dividends on common stock														(3,617)	(3,298)	(3,255)
Common stock issued and related tax effects (1)	[1]													1,996	1,641	1,512
Accumulated other comprehensive income														$ 1,511	$ (1,343)	$ 311
Publicly Announced Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Total number of shares repurchased														199
Average Price Paid per Share		$ 21.04												$ 21.04
Publicly Announced Share Repurchase Program February 2021
Equity, Class of Treasury Stock [Line Items]
Share repurchase authorized to be repurchased																	750
Maximum percentage of outstanding common stock authorized for repurchase																	7.50%
Shares available for repurchase		571												571
Publicly Announced Share Repurchase Program Prior Plan
Equity, Class of Treasury Stock [Line Items]
Total number of shares repurchased														20	504	0

[1] Includes the issuance of common stock under employee benefit plans, which includes nonqualified stock options and restricted stock expense related entries, employee option exercises and the tax benefit of options exercised.