Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income		$ 51,330	$ 62,644	$ 99,100	$ 123,891
Other comprehensive income (loss), net of tax
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax		3,392	(11,451)	384	5,617
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		1,735	(5,448)	247	4,715
Net change in other comprehensive income for defined benefit postretirement plans	[1]	(14)	(91)	(29)	(183)
Total other comprehensive income (loss)		5,113	(16,990)	602	10,149
Total comprehensive income		$ 56,443	$ 45,654	$ 99,702	$ 134,040

[1] The amortization of prior service costs is included in the computation of net periodic pension cost as disclosed in Note 12 - Employee Benefit Plans within the Notes to the Consolidated Financial Statements included in Item 8 of the Company’s 2023 Form 10-K.