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Goodwill and Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill	$ 40,231,000	$ 29,917,000	$ 29,917,000	$ 29,917,000
Core deposit intangibles	1,383,000	1,024,000
Intangible assets, accumulated amortization	490,000	1,741,000
Amortization of core deposit intangibles	149,000	$ 320,000	$ 337,000
Sierra Vista Bank
Goodwill [Line Items]
Goodwill	10,314,000
Visalia Community Bank
Goodwill [Line Items]
Goodwill	6,340,000
Service 1st Bank
Goodwill [Line Items]
Goodwill	14,643,000
Bank of Madera County
Goodwill [Line Items]
Goodwill	$ 8,934,000
Core deposits
Goodwill [Line Items]
Acquired finite-lived intangible assets useful life	10 years
Core deposits | Sierra Vista Bank
Goodwill [Line Items]
Acquired finite-lived intangible assets	$ 508,000
Core deposits | Visalia Community Bank
Goodwill [Line Items]
Acquired finite-lived intangible assets	$ 1,365,000
Maximum | Core deposits
Goodwill [Line Items]
Estimated useful life of intangible asset	10 years

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

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+ References

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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