Business Combinations - Assets Acquired and Liabilities Assumed (Details) - South Sound Merger $ in Thousands	Oct. 01, 2018 USD ($)
Business Acquisition [Line Items]
Total acquisition consideration	$ 35,170
Goodwill recognized	9,481
Book Value
Business Acquisition [Line Items]
Cash and cash equivalents	21,187
CDs held for investment	2,973
FHLB stock	205
Investment securities held to maturity	19,891
Investment securities available for sale	5,022
Loans receivable	123,627
Premises and equipment	3,225
OREO	25
Accrued interest receivable	554
BOLI	2,629
CDI	0
Loan servicing rights	285
Other assets	1,087
Total assets	180,710
Deposits	151,378
Other liabilities and accrued expenses	3,291
Total liabilities assumed	154,669
Total identifiable net assets acquired	26,041
Fair Value Adjustment
Business Acquisition [Line Items]
Cash and cash equivalents	0
CDs held for investment	0
FHLB stock	0
Investment securities held to maturity	(189)
Investment securities available for sale	0
Loans receivable	(2,083)
Premises and equipment	112
OREO	0
Accrued interest receivable	0
BOLI	0
CDI	2,483
Loan servicing rights	(4)
Other assets	(511)
Total assets	(192)
Deposits	160
Other liabilities and accrued expenses	0
Total liabilities assumed	160
Total identifiable net assets acquired	(352)
Estimated Fair Value
Business Acquisition [Line Items]
Total acquisition consideration	35,170
Cash and cash equivalents	21,187
CDs held for investment	2,973
FHLB stock	205
Investment securities held to maturity	19,702
Investment securities available for sale	5,022
Loans receivable	121,544
Premises and equipment	3,337
OREO	25
Accrued interest receivable	554
BOLI	2,629
CDI	2,483
Loan servicing rights	281
Other assets	576
Total assets	180,518
Deposits	151,538
Other liabilities and accrued expenses	3,291
Total liabilities assumed	154,829
Total identifiable net assets acquired	25,689
Goodwill recognized	$ 9,481