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Loans Receivable and Allowance for Loan Losses - Schedule of Accruing and Nonaccrual TDRs (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 322,000	$ 1,203,000
Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	348,000
Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded Investment	322,000	$ 855,000
Accruing
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,269		$ 12,021
Accruing | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded Investment	68		63
Accruing | Commercial real estate - owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment	45		0
Accruing | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,130		8,130
Accruing | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,026		3,828
Nonaccruing
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,769		8,408
Nonaccruing | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,519		5,939
Nonaccruing | Commercial real estate - owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment	0		0
Nonaccruing | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,787		1,766
Nonaccruing | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	463		703
Total
Financing Receivable, Impaired [Line Items]
Recorded Investment	19,038		20,429
Total | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,587		6,002
Total | Commercial real estate - owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment	45		0
Total | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded Investment	9,917		9,896
Total | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 3,489		$ 4,531

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+ References

No definition available.

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- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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