Income Taxes (Tables)

6 Months Ended

Jun. 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 June 30,														For the Six Months Ended June 30,
	2022							2021							2022							2021
(in thousands)	Amount			%				Amount			%				Amount			%				Amount			%
Provision for income taxes at the statutory rate of 21%	$	(1,376	)		21.0		%	$	21,424			21.0		%	$	10,914			21.0		%	$	40,290			21.0		%
Increase (reduction) in taxes resulting from:
Excess tax benefit on share-based compensation		(761	)		11.6		%		(270	)		(0.3	)	%		(2,175	)		(4.2	)	%		(2,194	)		(1.1	)	%
Tax exempt interest income		(288	)		4.4		%		(310	)		(0.3	)	%		(570	)		(1.1	)	%		(629	)		(0.3	)	%
Dividends received deduction		(163	)		2.5		%		(248	)		(0.2	)	%		(434	)		(0.8	)	%		(484	)		(0.3	)	%
Investment tax credit		(1,182	)		18.0		%		(801	)		(0.8	)	%		(2,363	)		(4.5	)	%		(1,603	)		(0.8	)	%
ESOP dividends paid deduction		(138	)		2.1		%		(137	)		(0.1	)	%		(268	)		(0.5	)	%		(267	)		(0.1	)	%
Nondeductible expenses		258			(3.9	)	%		826			0.8		%		574			1.1		%		1,237			0.6		%
Other items, net		(665	)		10.1		%		(278	)		(0.3	)	%		609			1.1		%		678			0.3		%
Total tax expense	$	(4,315	)		65.8		%	$	20,206			19.8		%	$	6,287			12.1		%	$	37,028			19.3		%