Revenue Recognition - Summary of Company's Revenue Streams (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Noninterest income:
Loan servicing fees	$ 480	$ 487	$ 398
Earnings on bank-owned life insurance	1,336	864	910
Net gain from sales of loans	771	1,698	1,729
Net gain from sales of investment securities	7,760	3,671	427
Other income	1,754	797	1,460
Total noninterest income	14,475	9,801	7,681
Service charges on deposit accounts
Noninterest income:
Noninterest income	1,715	1,558	1,330
Other service fee income
Noninterest income:
Noninterest income	311	359	356
Debit card interchange income
Noninterest income:
Noninterest income	348	367	1,071
Within Scope
Noninterest income:
Other income	217	107	192
Total noninterest income	2,591	2,391	2,949
Within Scope | Service charges on deposit accounts
Noninterest income:
Noninterest income	1,715	1,558	1,330
Within Scope | Other service fee income
Noninterest income:
Noninterest income	311	359	356
Within Scope | Debit card interchange income
Noninterest income:
Noninterest income	348	367	1,071
Out of Scope
Noninterest income:
Loan servicing fees	480	487	398
Earnings on bank-owned life insurance	1,336	864	910
Net gain from sales of loans	771	1,698	1,729
Net gain from sales of investment securities	7,760	3,671	427
Other income	1,537	690	1,268
Total noninterest income	$ 11,884	$ 7,410	$ 4,732