Summary of Significant Accounting Policies (Reclassification from AOCI) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)	$ 6,732	$ 2,004	$ (11,853)
Income tax expense (benefit)	75,098	(25,632)	(21,942)
Net of tax	(210,009)	91,925	108,394
Reclassification out of Accumulated Other Comprehensive Income | Defined Benefit Pension Plan
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)	2,570	2,861	2,407
Income tax expense (benefit)	(711)	(807)	(675)
Net of tax	1,859	2,054	1,732
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) in Fair Value of Investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)	121	(352)	(315)
Income tax expense (benefit)	(25)	74	66
Net of tax	$ 96	$ (278)	$ (249)