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Stockholders' Equity (Narrative) (Details) - USD ($)						3 Months Ended					6 Months Ended
Stockholders' Equity (Narrative) (Details) - USD ($)	Apr. 01, 2022	Jun. 01, 2020	Mar. 01, 2020	Jun. 03, 2019	Mar. 01, 2019	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 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							$ 184,000			$ 219,000	$ 385,000	$ 455,000
Dividends declared per common share (in dollars per Share)		$ 0.1125	$ 0.1125	$ 0.1000	$ 0.1000		$ 0.1125			$ 0.100	$ 0.225	$ 0.200
Stock Issued During Period, Shares, Employee Stock Purchase Plans							11,796			13,706	25,089	31,888
Employee Stock Purchase Plan Weighted Average Purchase Price Of Shares Purchased (in USD per share)							$ 33.70			$ 26.32	$ 39.86	$ 26.32
Treasury stock acquired (in shares)							205,496			324,700	695,496	324,700
Treasury Stock, Value, Acquired, Cost Method							$ 8,224,000			$ 12,301,000	$ 34,234,000	$ 12,301,000
Treasury Stock Acquired, Average Cost Per Share							$ 40.02			$ 37.88	$ 49.22	$ 37.88
Shares settled (in shares)							24,700				24,700
Treasury stock settled							$ 700,000				$ 700,000
Additional authorized amount													$ 75,000,000	$ 75,000,000
Additional authorized amount							$ 48,900,000				$ 48,900,000
Restricted Stock Units (RSUs)
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	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	$ 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							450			966	1,450	966
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation							(49)			0	4,136	9,688
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation							$ (2,000)			$ 0	$ 205,000	$ 347,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield											0.01%
Share-based compensation expense							$ 152,000			135,000	$ 351,000	341,000
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							$ 40,000			98,000	$ 97,000	219,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage											33.00%
Share-based compensation expense							550,000			480,000	$ 1,188,000	1,040,000
Proceeds from Stock Options Exercised							0			733,000	60,000	879,000
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation							$ 0			$ 681,000	$ 82,000	$ 976,000
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							0			0	0	150,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Options, Grants in Period, Aggregate Grant Date Market Value							$ 0			$ 0	$ 0	$ 1,684,000
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							23,263			0	27,013	10,254
Expected volatility	44.44%
Risk-free interest rate	2.55%
Expected holding period (years)	2 years 9 months
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Granted In Period, Fair Value							$ 1,100,000			$ 0	$ 1,262,000	$ 402,000
Share price at grant date	$ 52.49
Director
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							2,372			4,333	5,041	9,373
Share Based Compensation Arrangement By Share Based Payment Award, Options, Aggregate Grant Date Fair Value							$ 94,000			$ 160,000	$ 236,000	$ 338,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value							$ 39.65			$ 36.97	$ 46.83	$ 36.01
Officers And Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Directors compensation expense							$ 637,000			$ 352,000	$ 1,203,000	$ 589,000
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							126			135	219	277
Share Based Compensation Arrangement By Share Based Payment Award, Options, Aggregate Grant Date Fair Value							$ 5,000			$ 5,000	$ 10,000	$ 10,000