Changes to Accumulated Other Comprehensive Income, Net - Components of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in net unrealized holding (losses) gains on securities available-for-sale, net of deferred tax expense (benefit)	$ 182	$ (70)	$ 643	$ 71
Adjustment For Income Tax Expense	0	44	0	44
Change in net unrealized holding gains (losses) on interest rate swaps, net of deferred tax expense (benefit)	$ 205	$ 189	$ 1,180	$ (621)