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Mergers and Acquisitions (Unaudited Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Net interest income after loan loss provision	$ 9,387	$ 9,516	$ 9,310	$ 9,050	$ 8,579	$ 8,173	$ 8,148	$ 8,075	$ 37,263	$ 32,975	$ 30,818
Noninterest income	1,331	1,564	1,362	1,436	1,875	1,419	1,398	1,232	5,693	5,924	4,113
Noninterest expense	$ 8,047	$ 7,960	$ 7,558	$ 7,802	$ 7,740	$ 7,165	$ 6,931	$ 6,982	$ 31,367	$ 28,818	26,759
Phoenix Bancorp Inc. [Member]
Business Acquisition [Line Items]
Net interest income after loan loss provision											31,454
Noninterest income											4,152
Noninterest expense											27,817
Net income available to common shareholders											$ 5,811
Net income per common share											$ 1.38

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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Amount of interest income or expense, including any amortization and accretion (as applicable) of discounts and premiums, including consideration of the provisions for loan, lease, credit, and other related losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.12)
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Total aggregate amount of all noninterest expense.

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-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
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The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

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