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Organization and Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
|
Dec. 31, 2012
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| Organization and Summary of Significant Accounting Policies [Abstract] | |||
| Balance at beginning of year | $ 2,540 | $ 2,974 | $ 2,070 |
| Additions charged to expense | 389 | 1,142 | 2,101 |
| Write-offs charged against the allowance | (1,019) | (1,576) | (1,197) |
| Balance at end of year | $ 1,910 | $ 2,540 | $ 2,974 |