CONDENSED PARENT COMPANY ONLY FINANCIAL STATEMENTS - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 270,496	$ 130,263
Other assets	2,376	2,900
Total assets	1,631,858	1,432,650
Liabilities:
Total liabilities	1,415,134	1,264,042
Shareholders' Equity:
Preferred stock
Common stock	255	242
Additional paid-in capital	53,854	39,915
Retained earnings	162,616	128,555
Accumulated other comprehensive loss	(1)	(104)
Total shareholders' equity	216,724	168,608	$ 135,115	$ 107,261
Total liabilities and shareholders' equity	1,631,858	1,432,650
Parent company
Assets:
Cash and due from banks	15,991	2,600
Investment in bank subsidiary	200,886	165,096
Other assets	367	1,305
Total assets	217,244	169,001
Liabilities:
Accrued expenses and other liabilities	520	393
Total liabilities	520	393
Shareholders' Equity:
Preferred stock
Common stock	255	242
Additional paid-in capital	53,854	39,915
Retained earnings	162,616	128,555
Accumulated other comprehensive loss	(1)	(104)
Total shareholders' equity	216,724	168,608
Total liabilities and shareholders' equity	$ 217,244	$ 169,001