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Shareholders' Equity - Dividends and Share Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Dividends
Dividends declared and paid by subsidiary	$ 2,850	$ 3,133	$ 13,010
Dividends declared and paid during the period	$ 4,270	$ 3,010	$ 2,715
Dividends declared, per share	$ 0.31	$ 0.24	$ 0.24
California
Class of Stock [Line Items]
Dividends available for distribution free of restrictions	$ 33,036

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Dividends Declared By Subsidiary

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The amount of dividends that can be declared or paid without affecting the banking or savings institution's regulatory capital position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
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Aggregate dividends declared during the period for each share of common stock outstanding.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
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