Parent Company Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 100,687	$ 127,816
Other assets	13,705	8,044
Total assets	2,482,587	2,267,195
Liabilities and Shareholders' Equity
Subordinated debentures	35,998	35,890
Shareholders' equity	228,294	205,860	$ 173,916	$ 149,686
Total liabilities and shareholders' equity	2,482,587	2,267,195
Revenues
Interest income	94,818	92,652	76,657
Expenses
Interest expense	15,008	25,383	16,505
Income tax benefit	5,491	7,621	6,401
Net income	18,328	27,858	22,289
Operating activities
Net income	18,328	27,858	22,289
Adjustments to reconcile net income to cash provided by (used for) operating activities
Compensation expense related to stock options and restricted stock grants	1,397	1,698	1,502
(Increase) decrease in other assets	(4,670)	(600)	216
Net cash provided by operating activities	20,619	18,309	31,703
Investing activities
Net cash used for investing activities	(230,770)	(275,583)	(301,708)
Financing activities
Net cash provided by financing activities	183,022	312,217	250,713
Cash and cash equivalents, beginning of year	127,816	72,873	92,165
Cash and cash equivalents, end of year	100,687	127,816	72,873
Parent Company [Member]
Assets
Cash and cash equivalents	9,019	7,753
Investment in subsidiaries	255,518	234,310
Other assets	29	6
Total assets	264,566	242,069
Liabilities and Shareholders' Equity
Accounts payable and accrued expenses	274	319
Subordinated debentures	35,998	35,890
Shareholders' equity	228,294	205,860
Total liabilities and shareholders' equity	264,566	242,069
Revenues
Interest income	17	13	9
Total revenue	17	13	9
Expenses
Interest expense	1,708	929	592
Other expenses	283	240	240
Total expenses	1,991	1,169	832
Income tax benefit	415	243	173
Loss before equity in undistributed net income of subsidiaries	(1,559)	(913)	(650)
Equity in undistributed net income of subsidiaries	19,887	28,771	22,939
Net income	18,328	27,858	22,289
Operating activities
Net income	18,328	27,858	22,289
Adjustments to reconcile net income to cash provided by (used for) operating activities
Equity in undistributed net income of subsidiaries	(19,887)	(28,771)	(22,939)
Compensation expense related to stock options and restricted stock grants	1,397	1,698	1,502
(Increase) decrease in other assets	(23)	12	12
Increase (decrease) in accounts payable and accrued expenses	63	(202)	2
Net cash provided by operating activities	(122)	595	866
Investing activities
Investment in subsidiaries, net
Net cash used for investing activities
Financing activities
Issuance of common stock
Proceeds from the exercise of stock options and warrants	1,388	1,769	900
Net cash provided by financing activities	1,388	1,769	900
Net increase in cash and cash equivalents	1,266	2,364	1,766
Cash and cash equivalents, beginning of year	7,753	5,389	3,623
Cash and cash equivalents, end of year	$ 9,019	$ 7,753	$ 5,389