Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income		$ 47,770	$ 61,247
Other comprehensive (loss) income, net of tax
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax		(3,008)	17,068
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		(1,488)	10,163
Net change in other comprehensive income for defined benefit postretirement plans	[1]	(15)	(92)
Total other comprehensive (loss) income		(4,511)	27,139
Total comprehensive income		$ 43,259	$ 88,386

[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.