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Stockholders' Equity (Narrative) (Details) - USD ($)				3 Months Ended
Stockholders' Equity (Narrative) (Details) - USD ($)	Apr. 16, 2021	Mar. 01, 2020	Mar. 01, 2019	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Mar. 31, 2021	Jul. 26, 2021	May 18, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value					$ 25.88
Directors compensation expense					$ 201,000			$ 236,000
Dividends declared per common share (in dollars per Share)		$ 0.1125	$ 0.1000		$ 0.1125			$ 0.100
Stock Issued During Period, Shares, Employee Stock Purchase Plans					13,293			18,182
Employee Stock Purchase Plan Weighted Average Purchase Price Of Shares Purchased (in USD per share)					$ 45.33			$ 26.32
Treasury Stock, Shares, Acquired					490,000			0
Treasury Stock, Value, Acquired, Cost Method					$ 26,010,000			$ 0
Treasury Stock Acquired, Average Cost Per Share					$ 53.08			$ 0
Shares settled (in shares)					52,242
Treasury stock settled					$ 2,800,000
Additional authorized amount									$ 75,000,000	$ 75,000,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period					0			9,300
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Grants in Period, Aggregate Grant Date Market Value					$ 0			$ 324,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value								$ 34.79
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited					1,000			0
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation					4,185			9,688
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation					$ 207,000			$ 347,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield					0.01%
Share-based compensation expense					$ 199,000			206,000
Expected volatility					30.24%
Risk-free interest rate					0.31%	0.22%	0.08%
Expected holding period (years)					9 months	6 months	3 months
ESPP \| Forecast
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate				0.40%
Expected holding period (years)				1 year
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense					$ 57,000			$ 121,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield					0.91%			0.91%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage					33.00%
Share-based compensation expense					$ 638,000			$ 560,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross					58,500			310,000
Expected volatility					33.18%			34.35%
Risk-free interest rate					1.89%			1.98%
Expected holding period (years)					5 years			7 years
Proceeds from Stock Options Exercised					$ 60,000			$ 147,000
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation					$ 82,000			$ 295,000
Stock options \| Monte-Carlo Pricing Model
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross								150,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Options, Grants in Period, Aggregate Grant Date Market Value								$ 1,700,000
Share price at grant date					$ 49.48			$ 34.79
Performance awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period					3,750			0
Expected volatility	44.00%
Risk-free interest rate	1.75%
Expected holding period (years)	2 years 10 months 6 days
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Granted In Period, Fair Value					$ 162,000			$ 0
Share price at grant date	$ 49.48
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross					2,669			5,040
Share Based Compensation Arrangement By Share Based Payment Award, Options, Aggregate Grant Date Fair Value					$ 142,000			$ 177,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value					$ 53.33			$ 35.19
Officers And Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Directors compensation expense					$ 566,000			$ 237,000
Advsior
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross					93			142
Share Based Compensation Arrangement By Share Based Payment Award, Options, Aggregate Grant Date Fair Value					$ 5,000			$ 5,000