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The Business of Sierra Bancorp (Narrative) (Details) $ in Thousands | Jun. 30, 2016 USD ($) | Dec. 31, 2015 USD ($)
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Business Acquisition [Line Items] |  |
Capital | $ 1,500 |
Number of full service branch offices | 33 |
Assets | $ 1,843,288 | $ 1,796,537

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