Fair Value Measurements (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Held-to-maturity impairment	$ 0	$ 0
Allowance for credit loss	0	$ 0
Current portion of long-term debt	$ 15,734,000		$ 16,031,000