Acquisitions - Schedule of Assets Acquired and Liabilities Assumed and Fair Value Adjustments (Details) - USD ($) $ in Thousands	Oct. 15, 2018	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill recognized		$ 58,563	$ 58,383
First American International Corp.
Business Acquisition [Line Items]
Cash and cash equivalents	$ 55,891
Fed funds sold	218
Interest-bearing deposits in other financial Institutions	3,801
Investments - held to maturity	30,203
Investments - available for sale	14,388
Mortgage loans held for sale	1,915
Loans, gross	715,571
Bank premises and equipment	9,224
Mortgage servicing rights	10,614
Core deposit premium	6,738
Other assets	1,399
Total assets acquired	849,962
Deposits	629,703
FHLB advances	124,500
Subordinated debentures	5,976
Other liabilities	13,787
Total liabilities assumed	773,966
Excess of assets acquired over liabilities assumed	75,996
Stock consideration	69,602
Cash paid	34,837
Goodwill recognized	28,443
First American International Corp. | Book Value
Business Acquisition [Line Items]
Cash and cash equivalents	55,891
Fed funds sold	218
Interest-bearing deposits in other financial Institutions	3,801
Investments - held to maturity	30,814
Investments - available for sale	14,388
Mortgage loans held for sale	1,915
Loans, gross	721,732
Allowance for loan losses	(9,583)
Bank premises and equipment	5,785
Mortgage servicing rights	11,274
Other assets	3,518
Total assets acquired	839,753
Deposits	629,609
FHLB advances	124,500
Subordinated debentures	7,217
Other liabilities	14,940
Total liabilities assumed	776,266
Excess of assets acquired over liabilities assumed	63,487
Business combination, Recognized identifiable assets acquired and liabilities assumed, net	839,753
First American International Corp. | Fair Value Adjustments
Business Acquisition [Line Items]
Investments - held to maturity	(611)
Loans, gross	(6,161)
Allowance for loan losses	9,583
Bank premises and equipment	3,439
Mortgage servicing rights	(660)
Core deposit premium	6,738
Other assets	(2,119)
Total assets acquired	10,209
Deposits	94
Subordinated debentures	(1,241)
Other liabilities	(1,153)
Total liabilities assumed	(2,300)
Excess of assets acquired over liabilities assumed	12,509
Business combination, Recognized identifiable assets acquired and liabilities assumed, net	$ 10,209