Stockholders' Equity and Earnings per Share, Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Available-for-sale securities [Abstract]
Realized gains on sales of securities	$ 0	$ 0
Tax effect	0	0
Total	$ 0	$ 0

Amount before tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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