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Stockholders' Equity (Narrative) (Details) - USD ($) |  |  |  |  |  | 3 Months Ended | 6 Months Ended
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Jun. 21, 2023 | Jun. 01, 2023 | Mar. 01, 2023 | Jun. 03, 2022 | Mar. 01, 2022 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
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 |  |  |  |  |  |  |  |  |  |  | $ 22.26 |
Directors compensation expense |  |  |  |  |  |  | $ 189,000 |  |  | $ 184,000 | $ 355,000 | $ 385,000
Dividends declared per common share (in dollars per Share) |  | $ 0.1125 | $ 0.1125 | $ 0.1125 | $ 0.1125 |  | $ 0.1125 |  |  | $ 0.1125 | $ 0.2250 | $ 0.2250
Issuance of common stock from employee stock purchase plan, shares |  |  |  |  |  |  | 16,386 |  |  | 11,796 | 38,042 | 25,089
Employee Stock Purchase Plan Weighted Average Purchase Price Of Shares Purchased (in USD per share) |  |  |  |  |  |  | $ 24.28 |  |  | $ 33.70 | $ 24.28 | $ 39.86
Treasury stock acquired, shares |  |  |  |  |  |  | 0 |  |  | 205,496 | 0 | 695,496
Treasury Stock, Value, Acquired, Cost Method |  |  |  |  |  |  | $ 0 |  |  | $ 8,224,000 | $ 0 | $ 34,234,000
Treasury Stock Acquired, Average Cost Per Share |  |  |  |  |  |  | $ 0 |  |  | $ 40.02 | $ 0 | $ 49.22
Remaining authorized repurchase 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 | 142,020 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Grants in Period, Aggregate Grant Date Market Value |  |  |  |  |  |  | $ 0 |  |  | $ 0 | $ 4,634,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  |  |  |  |  |  |  |  | $ 32.63 |
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited |  |  |  |  |  |  | 776 |  |  | 450 | 1,826 | 1,450
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  |  | 39 |  |  | (49) | 1,473 | 4,136
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  |  |  |  |  |  | $ 1,000 |  |  | $ (2,000) | $ 50,000 | $ 205,000
ESPP |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Dividend yield |  |  |  |  |  |  |  |  |  |  | 1.30% |
Share-based compensation expense |  |  |  |  |  |  | $ 163,000 |  |  | 152,000 | $ 415,000 | 351,000
Expected volatility |  |  |  |  |  |  |  |  |  |  | 53.51% |
Risk-free interest rate |  |  |  |  |  |  | 4.75% | 4.77% | 4.53% |  |  |
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 |  |  |  |  |  | 4.72% |  |  |  |  |  |
Expected holding period (years) |  |  |  |  |  | 1 year |  |  |  |  |  |
Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  |  |  |  |  | $ 394,000 |  |  | 40,000 | $ 572,000 | 97,000
Stock options |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Dividend yield |  |  |  |  |  |  |  |  |  |  | 1.38% |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  |  |  |  |  |  |  |  |  |  | 33.00% |
Share-based compensation expense |  |  |  |  |  |  | 735,000 |  |  | 550,000 | $ 1,445,000 | 1,188,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  |  |  |  |  |  |  |  | 214,191 |
Expected volatility |  |  |  |  |  |  |  |  |  |  | 43.68% |
Risk-free interest rate |  |  |  |  |  |  |  |  |  |  | 4.27% |
Expected holding period (years) |  |  |  |  |  |  |  |  |  |  | 4 years |
Proceeds from Stock Options Exercised |  |  |  |  |  |  | 0 |  |  | 0 | $ 0 | 60,000
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  |  |  |  |  |  | $ 20,000 |  |  | $ 0 | $ 41,000 | $ 82,000
Stock options | Monte-Carlo Pricing Model |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Share price at grant date |  |  |  |  |  |  |  |  |  |  | $ 32.69 |
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 |  |  |  |  |  |  | 0 |  |  | 23,263 | 0 | 27,013
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Granted In Period, Fair Value |  |  |  |  |  |  | $ 0 |  |  | $ 1,100,000 | $ 0 | $ 1,262,000
Common stock |  |  |  |  |  |  |  |  |  |  |  |
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 | 30,000 | 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Grants in Period, Aggregate Grant Date Market Value |  |  |  |  |  |  | $ 0 |  |  | $ 0 | $ 826,000 | $ 0
Share-based compensation expense |  |  |  |  |  |  |  |  |  |  | $ 826,000 |
Share price at grant date |  |  |  |  |  |  |  |  |  |  | $ 27.54 |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  |  | 0 |  |  | 0 | 1,001 | 0
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  |  |  |  |  |  | $ 0 |  |  | $ 0 | $ 28,000 | $ 0
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 | 910 |  |  |  |  |  | 1,077 |  |  | 2,372 | 4,595 | 5,041
Share Based Compensation Arrangement By Share Based Payment Award, Options, Aggregate Grant Date Fair Value | $ 25,000 |  |  |  |  |  | $ 35,000 |  |  | $ 94,000 | $ 142,000 | $ 236,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  |  |  |  | $ 32.47 |  |  | $ 39.65 | $ 31.01 | $ 46.83
Advisor |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  | 153 |  |  | 126 | 316 | 219
Share Based Compensation Arrangement By Share Based Payment Award, Options, Aggregate Grant Date Fair Value |  |  |  |  |  |  | $ 5,000 |  |  | $ 5,000 | $ 10,000 | $ 10,000
Officers and Key Employees |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Directors compensation expense |  |  |  |  |  |  | $ 665,000 |  |  | $ 637,000 | $ 728,000 | $ 1,203,000

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