Parent Company Financial Information (Condensed Balance Sheets, Parent Only) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Assets
Investment securities available for sale, at fair value	$ 139,568				$ 122,791
Premises and equipment, net	24,924				23,821
Other assets	46,779				40,572
TOTAL ASSETS	1,933,315				1,559,235
Liabilities
Other liabilities	7,238				4,081
TOTAL LIABILITIES	1,738,296				1,366,433
Stockholders' equity
Common stock	118				125
Additional paid in capital	52,167				61,045
Retained earnings	141,205				131,425
Accumulated other comprehensive loss	1,529				207
Total stockholders' equity	195,019	$ 198,881	$ 200,134	$ 195,694	192,802	$ 193,963	$ 191,307	$ 187,082	$ 183,185
Total liabilities and stockholders' equity	1,933,315				1,559,235
Parent Company [Member]
Assets
Cash	16,653				7,522
Investment in subsidiaries	201,462				183,183
Other assets	3,204				2,483
TOTAL ASSETS	221,319				193,188
Liabilities
Accrued interest payable	482
Other liabilities	1,389				386
Long-term debt	24,429
TOTAL LIABILITIES	26,300				386
Stockholders' equity
Common stock	118				125
Additional paid in capital	52,167				61,045
Retained earnings	141,205				131,425
Accumulated other comprehensive loss	1,529				207
Total stockholders' equity	195,019				192,802
Total liabilities and stockholders' equity	$ 221,319				$ 193,188