Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Financial Assets:
Cash and cash equivalents	$ 188,145	$ 106,310
Loans held for sale	104,218	26,659
Loans receivable, net	1,217,597	1,109,217
Accrued interest receivable, net	3,931	3,985
Other investments:
Time deposits placed	96	95
Servicing assets	15,138	9,106	$ 8,800
Financial Liabilities:
Deposit	1,497,270	1,200,789
FHLB Advances		5,000
Accrued interest payable	575	1,021
Carrying Amount
Financial Assets:
Cash and cash equivalents	188,145	106,310
Loans held for sale	94,466	26,659
Loans receivable, net	1,217,687	1,084,384
Accrued interest receivable, net	3,931	3,985
Other investments:
FHLB and PCBB stock	7,195	6,233
Time deposits placed	96	95
Servicing assets	12,389	7,360
Financial Liabilities:
Deposit	1,496,406	1,200,090
FHLB Advances		5,000
Accrued interest payable	575	1,021
Level 1
Financial Assets:
Cash and cash equivalents	188,145	106,310
Loans held for sale	0	0
Loans receivable, net	0	0
Accrued interest receivable, net	5	7
Other investments:
Time deposits placed	0	0
Servicing assets	0	0
Financial Liabilities:
Deposit	0	0
FHLB Advances		0
Accrued interest payable	0	0
Level 2
Financial Assets:
Cash and cash equivalents	0	0
Loans held for sale	104,218	26,659
Loans receivable, net	0	0
Accrued interest receivable, net	267	249
Other investments:
Time deposits placed	96	95
Servicing assets	0	0
Financial Liabilities:
Deposit	1,497,270	1,200,789
FHLB Advances		5,000
Accrued interest payable	575	1,021
Level 3
Financial Assets:
Cash and cash equivalents	0	0
Loans held for sale	0	0
Loans receivable, net	1,217,597	1,109,217
Accrued interest receivable, net	3,659	3,729
Other investments:
Time deposits placed	0	0
Servicing assets	15,138	9,106
Financial Liabilities:
Deposit	0	0
FHLB Advances		0
Accrued interest payable	$ 0	$ 0