Income Taxes (Tables)

9 Months Ended

Sep. 30, 2022

Income Tax Disclosure [Abstract]

Schedule of Reconciliation of Income Tax Expense Attributable to Income from Operations with Amounts Computed by Applying U.S. Federal Tax Rate to Pretax Income from Continuing Operations

	For the Three Months Ended September 30, 2022								For the Nine Months Ended September 30, 2022
	2022				2021				2022				2021
(in thousands)	Amount		%		Amount		%		Amount		%		Amount		%
Provision for income taxes at the statutory rate of 21%	$	116,487	21.0	%	$	7,442	21.0	%	$	127,401	21.0	%	$	47,731	21.0	%
Increase (reduction) in taxes resulting from:
Excess tax benefit on share-based compensation		(95)	(0.0)	%		(225)	(0.6)	%		(2,270)	(0.4)	%		(2,419)	(1.1)	%
Tax exempt interest income		(280)	(0.1)	%		(298)	(0.8)	%		(850)	(0.1)	%		(927)	(0.4)	%
Dividends received deduction		(240)	(0.0)	%		(223)	(0.6)	%		(673)	(0.1)	%		(707)	(0.3)	%
Investment tax credit		(1,181)	(0.2)	%		(801)	(2.3)	%		(3,545)	(0.6)	%		(2,404)	(1.0)	%
ESOP dividends paid deduction		(136)	(0.0)	%		(132)	(0.4)	%		(404)	(0.0)	%		(399)	(0.2)	%
Nondeductible expenses		34	0.0	%		642	1.8	%		608	0.1	%		1,879	0.8	%
Other items, net		220	0.0	%		(211)	(0.6)	%		829	0.1	%		468	0.2	%
Total tax expense	$	114,809	20.7	%	$	6,194	17.5	%	$	121,096	20.0	%	$	43,222	19.0	%