Loans and Leases Receivable and Allowance for Loan and Lease Losses - Schedule of Accruing and Nonaccrual TDRs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 1,437	$ 1,675	$ 8,071
Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded investment	431	0	6,437
Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	83	352	0
Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded investment	923	1,310	1,634
Other consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	0	13	0
Accruing TDRs
Financing Receivable, Impaired [Line Items]
Recorded investment	11,251	11,624	12,021
Accruing TDRs | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded investment	60	64	63
Accruing TDRs | Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Recorded investment	13	32	0
Accruing TDRs | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	2,935	3,026	3,828
Accruing TDRs | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded investment	8,243	8,502	8,130
Accruing TDRs | Other consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	0	0	0
Nonaccrual TDRs
Financing Receivable, Impaired [Line Items]
Recorded investment	2,046	7,572	8,408
Nonaccrual TDRs | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded investment	23	5,273	5,939
Nonaccrual TDRs | Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Recorded investment	0	0	0
Nonaccrual TDRs | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	631	667	703
Nonaccrual TDRs | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded investment	1,382	1,620	1,766
Nonaccrual TDRs | Other consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	10	12	0
Total
Financing Receivable, Impaired [Line Items]
Recorded investment	13,297	19,196	20,429
Total | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded investment	83	5,337	6,002
Total | Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Recorded investment	13	32	0
Total | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	3,566	3,693	4,531
Total | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded investment	9,625	10,122	9,896
Total | Other consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 10	$ 12	$ 0