Parent Company Only Financial Statements - Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 13,519	$ 15,430
Investment securities available for sale, at fair value	315,580	262,967
Accrued interest receivable	3,931	4,048
Prepaid expenses and other assets	8,872	5,520
Total assets	1,307,336	1,258,758
LIABILITIES AND SHAREHOLDERS' EQUITY
Total liabilities	1,130,485	1,086,494
Shareholders' equity	176,851	172,264	$ 177,045
Total liabilities and shareholders' equity	1,307,336	1,258,758
Consolidated company
ASSETS
Cash and due from banks	5,989	8,508
Investment securities available for sale, at fair value	11,684	14,189
Investment in bank	147,744	137,657
ESOP loan receivable	10,740	11,300
Accrued interest receivable	190	212
Prepaid expenses and other assets	704	534
Total assets	177,051	172,400
LIABILITIES AND SHAREHOLDERS' EQUITY
Payable to subsidiary	177	96
Other liabilities	23	40
Total liabilities	200	136
Shareholders' equity	176,851	172,264
Total liabilities and shareholders' equity	$ 177,051	$ 172,400