Investments (Narrative) (Details)	3 Months Ended
	Mar. 31, 2022 USD ($) security	Mar. 31, 2021 USD ($)	Dec. 31, 2021 security
Schedule of Available-for-sale Securities [Line Items]
Gross gains on investments	$ 152,000	$ 1,500,000
Gross losses on investments	6,000	100,000
Proceeds from sale of investment securities	500,000	1,200,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]
Other-than-temporary impairment	0	0
Debt Securities, Available-for-sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment	$ 0	$ 0
Debt Securities [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]
Number of debt securities with unrealized loss | security	197		100
Number of debt securities with unrealized loss, less than 12 months | security	164		74
Number of debt securities with unrealized loss, greater than 12 months | security	33		26