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Organization and Summary of Significant Accounting Policies (Intangibles and Per Share Information) (Details) - USD ($) shares in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Shares: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of common shares outstanding | 7,739 | 7,839 | 7,841 | 7,848 | 7,839 | 7,938 | 7,976 | 7,914 | 7,846 | 8,126 | 8,106 | 8,033 | 7,811 | 7,917 | 8,029
Dilutive and potentially dilutive common shares |  |  |  |  |  |  |  |  |  |  |  |  | 171 | 224 | 260
Total shares | 7,872 | 7,963 | 7,991 | 8,044 | 8,037 | 8,123 | 8,179 | 8,129 | 8,084 | 8,329 | 8,303 | 8,273 | 7,982 | 8,141 | 8,289
Indefinite lived intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets with indefinite useful lives | $ 0 |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |
Customer relationships |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |

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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + 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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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