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Investment In Bank of Rio Vista (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Mar. 26, 2018
Acquisition [Abstract]
Increase in recorded investment	$ 381	$ 0
Bank of Rio Vista [Member]
Acquisition [Abstract]
Total ownership of shares (in shares)	1,586
Percentage of ownership of common shares outstanding	39.65%		40.35%
Total price paid for common shares	$ 12,000
Increase in recorded investment	$ 381

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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