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Summary of Significant Accounting Policies (Computation of Basic and Diluted Common Shares) (Details) - shares shares in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Weighted average number of shares outstanding for basic per share calculation | 15,854 | 15,738 | 15,833 | 15,716
Effect of dilutive potential shares: |  |  |  |
Adjusted weighted average shares outstanding for diluted per share | 16,131 | 16,043 | 16,113 | 16,063
Stock Options [Member] |  |  |  |
Effect of dilutive potential shares: |  |  |  |
Effect of dilutive potential shares | 241 | 285 | 237 | 298
Anti-dilutive shares: |  |  |  |
Anti-dilutive shares | 111 | 73 | 111 | 73
Restricted Stock Awards [Member] |  |  |  |
Effect of dilutive potential shares: |  |  |  |
Effect of dilutive potential shares | 36 | 20 | 43 | 49
Anti-dilutive shares: |  |  |  |
Anti-dilutive shares | 81 | 127 | 19 | 75

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e1505-109256 + Details
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