Fair Value Measurements and Derivative Instruments (Available-for-sale Securities Maturities) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Amortized cost
Within 1 year	$ 2,567
After 1 year through 5 years	15,107
After 5 years through 10 years	71,033
After 10 years	161,580
Amortized cost	250,287	$ 260,145
Estimated fair value
Within 1 year	2,280
After 1 year through 5 years	13,669
After 5 years through 10 years	56,861
After 10 years	119,908
Total	$ 192,718	$ 208,266