Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2022

Retirement Benefits [Abstract]

Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan

The following table sets forth information regarding the Pension, RIM, Post-retirement and Split-Dollar Life Insurance Plans at December 31, 2022 and 2021:

	At December 31,
	2022		2021		2022		2021		2022		2021		2022		2021
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	(In thousands)
Change in benefit obligation:
Benefit obligation at beginning of year	$	310,416	$	312,440	$	15,650	$	16,530	$	26,335	$	30,621	$	20,140	$	19,981
Acquired	—		—		—		—		—		—		1,503		—
Service cost	6,466		8,044		372		398		346		520		511		562
Interest cost	9,510		7,317		389		343		600		562		612		500
Actuarial gain	(88,943)		(9,023)		(3,505)		(1,292)		(6,849)		(4,805)		(6,534)		(903)
Benefits paid	(15,317)		(8,362)		(296)		(329)		(649)		(563)		(255)		—
Benefit obligation at end of year	222,132		310,416		12,610		15,650		19,783		26,335		15,977		20,140
Change in plan assets:
Fair value of plan assets at beginning of year	492,132		411,907		—		—		—		—		—		—
Actuarial (loss) return on plan assets	(83,063)		53,587		—		—		—		—		—		—
Employer contributions	10,000		35,000		296		329		649		563		255		—
Benefits paid	(15,317)		(8,362)		(296)		(329)		(649)		(563)		(255)		—
Fair value of plan assets at end of year	403,752		492,132		—		—		—		—		—		—
Funded status at end of year	$	181,620	$	181,716	$	(12,610)	$	(15,650)	$	(19,783)	$	(26,335)	$	(15,977)	$	(20,140)

The following table sets forth information regarding the Pension Plan and Post-retirement Plan at December 31, 2022:

	At December 31,
	2022		2022
	Pension Plan		Post-retirement Plan
	(In thousands)
Change in benefit obligation:
Benefit obligation at beginning of year	$	—	$	—
Acquired	7,202		3,163
Service cost	—		93
Interest cost	198		93
Actuarial gain	(1,009)		(1,298)
Benefits paid	(129)		(4)
Settlements	(205)		—
Benefit obligation at end of year	6,057		2,047
Change in plan assets:
Fair value of plan assets at beginning of year	—		—
Acquired	7,819		—
Actuarial return on plan assets	(424)		—
Employer contributions	—		4
Benefits paid	(129)		(4)
Settlements	(205)		—
Fair value of plan assets at end of year	7,061		—
Funded status at end of year	$	1,004	$	(2,047)

Schedule of Amounts Recognized in Other Comprehensive Income (Loss)

The components of accumulated other comprehensive income related to the Pension Plan, RIM Plan, and Post-retirement Plan and Split-Dollar Life Insurance Plans on a pre-tax basis, at December 31, 2022, 2021, and 2020, are summarized in the following table:

	At December 31,
	2022								2021
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
Unrecognized prior service costs	$	—	$	—	$	—	$	294	$	—	$	—	$	—	$	350
Unrecognized net actuarial loss (income)	60,970		1,781		(161)		(65)		38,909		5,730		6,999		7,071
Total accumulated other comprehensive loss (income)	$	60,970	$	1,781	$	(161)	$	229	$	38,909	$	5,730	$	6,999	$	7,421

	At December 31, 2020
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
Unrecognized prior service costs	$	—	$	—	$	—	$	405
Unrecognized net actuarial loss	76,686		7,686		12,417		8,741
Total accumulated other comprehensive loss	$	76,686	$	7,686	$	12,417	$	9,146

The weighted average actuarial assumptions used in the plan determinations at and for the years ended December 31, 2022, 2021, and 2020 were as follows:

	At and For the Years Ended December 31, 2022
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	5.260	%	5.210	%	5.180	%	5.310	%
Rate of compensation increase	3.750		3.750		N/A		3.750
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	3.140	%	2.970	%	2.900	%	3.300	%
Remeasurement rate	4.860		N/A		N/A		N/A
Service cost	3.320		3.160		3.190		3.490
Remeasurement rate	4.950		N/A		N/A		N/A
Interest cost	2.660		2.520		2.340		2.950
Remeasurement rate	4.580		N/A		N/A		N/A
Expected rate of return on plan assets	6.200		N/A		N/A		N/A
Remeasurement rate	7.000		N/A		N/A		N/A
Rate of compensation increase	3.750		3.750		N/A		3.750

	At and For the Years Ended December 31, 2021
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	3.140	%	2.970	%	2.900	%	3.220	%
Rate of compensation increase	3.750		3.750		N/A		3.750
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	2.920	%	2.670	%	2.590	%	3.010	%
Remeasurement rate	3.200		N/A		N/A		N/A
Service cost	3.210		2.930		2.960		3.260
Remeasurement rate	3.460		N/A		N/A		N/A
Interest cost	2.280		2.100		1.880		2.530
Remeasurement rate	2.550		N/A		N/A		N/A
Expected rate of return on plan assets	6.200		N/A		N/A		N/A
Rate of compensation increase	3.750		3.750		N/A		3.750

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	At and For the Years Ended December 31, 2020
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	2.920	%	2.670	%	2.590	%	3.010	%
Rate of compensation increase	3.750		3.750		N/A		3.750
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	3.490	%	3.330	%	3.270	%	3.540	%
Remeasurement rate	2.740		N/A		N/A		N/A
Service cost	3.660		3.460		3.520		3.710
Remeasurement rate	2.970		N/A		N/A		N/A
Interest cost	3.120		3.000		2.850		3.280
Remeasurement rate	2.220		N/A		N/A		N/A
Expected rate of return on plan assets	6.500		N/A		N/A		N/A
Rate of compensation increase	3.500		3.500		N/A		3.500

The components of accumulated other comprehensive income related to the Pension Plan and Post-retirement Plan on a pre-tax basis, at December 31, 2022 are summarized in the following table:

	At December 31, 2022
	Pension Plan		Post-retirement Plan
	(In thousands)
Unrecognized prior service costs	$	—	$	—
Unrecognized net actuarial (income)	(281)		(868)
Total accumulated other comprehensive (income)	$	(281)	$	(868)

The weighted average actuarial assumptions used in the assumed determinations at and for the year ended December 31, 2022 were as follows:

	At and For the Years Ended December 31, 2022
	Pension Plan		RIM Plan
Weighted average assumptions used to determine benefit obligation:
Discount rate	5.240	%	5.360	%
Rate of compensation increase	N/A		N/A
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	4.210	%	4.580	%
Expected rate of return on plan assets	5.750	%	N/A

Schedule of Net Benefit Costs

Net periodic (income) benefit cost for the Pension Plan, RIM Plan, Post-retirement Plan and Split-Dollar Life Insurance plan benefits for the years ended December 31, 2022 and 2021, and 2020, includes the following components:

	For the Year Ended December 31, 2022
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	6,466	$	372	$	346	$	511	Compensation and employee benefits
Interest cost	9,510		389		600		612		Other non-interest expense
Expected return on plan assets	(29,262)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		56		Other non-interest expense
Net loss	1,320		444		311		602		Other non-interest expense
Net periodic (income) benefit cost	$	(11,966)	$	1,205	$	1,257	$	1,781

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	For the Year Ended December 31, 2021
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	8,044	$	398	$	520	$	562	Compensation and employee benefits
Interest cost	7,317		343		562		500		Other non-interest expense
Expected return on plan assets	(26,833)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		56		Other non-interest expense
Net loss	2,001		664		613		765		Other non-interest expense
Net periodic (income) benefit cost	$	(9,471)	$	1,405	$	1,695	$	1,883

	For the Year Ended December 31, 2020
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	7,985	$	267	$	394	$	467	Compensation and employee benefits
Interest cost	7,608		405		683		507		Other non-interest expense
Expected return on plan assets	(23,375)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		56		Other non-interest expense
Net loss	4,902		397		309		454		Other non-interest expense
Net periodic (income) benefit cost	$	(2,880)	$	1,069	$	1,386	$	1,484

Net periodic (income) benefit cost for the Pension Plan and Post-retirement Plan for the year ended December 31, 2022 includes the following components:

	For the Year Ended
	December 31, 2022
	Pension Plan		Post-retirement Plan		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	—	$	93	Compensation and employee benefits
Interest cost	198		93		Other non-interest expense
Expected return on plan assets	(295)		—		Other non-interest expense
Settlements/curtailments	(10)		(430)		Other non-interest expense
Net periodic (income) benefit cost	$	(107)	$	(244)

Schedule of Expected Benefit Payments

Estimated future benefit payments, which reflect expected future service, as appropriate for the next five years and thereafter are as follows:

For the Year Ended December 31,	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
2023	$	9,842	$	431	$	1,325	$	427
2024	10,610		604		1,390		463
2025	11,331		735		1,458		508
2026	11,989		795		1,527		566
2027	12,653		829		1,571		624
2028 - 2032	73,758		4,628		7,683		3,774

Estimated future benefit payments, which reflect expected future service, as appropriate for the next five years and thereafter are as follows:

For the Year Ended December 31,	Pension Plan		Post-retirement Plan
	(In thousands)
2023	$	209	$	15
2024	224		27
2025	237		37
2026	260		45
2027	308		54
2028 - 2032	2,058		407

Schedule of Allocation of Plan Assets

The weighted average asset allocation of pension assets at December 31, 2022 and 2021 were as follows:

	December 31,
	2022		2021
Domestic equities	38.4	%	44.2	%
Foreign equities	11.1		12.2
Fixed income	49.0		40.7
Real estate	—		2.4
Cash	1.5		0.5
Total	100.0	%	100.0	%

The target allocation of assets and acceptable ranges around the targets are as follows:

	Allowable Range
Equities	35-70%
Fixed income	40-60%
Real estate	0-10%
Cash	0-15%

The following tables present the assets that are measured at fair value on a recurring basis by level within the U.S. GAAP fair value hierarchy as reported on the Statements of Net Assets Available for Plan Benefits at December 31, 2022 and 2021, respectively. A financial instrument's level within the fair value hierarchy's is based on the lowest level of input that is significant to the fair value measurement.

	December 31, 2022
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Money market mutual funds	$	6,247	$	6,247	$	—	$	—
Mutual funds - value stock fund	32,764		32,764		—		—
Mutual funds - fixed income	197,680		197,680		—		—
Mutual funds - international stock	44,833		44,833		—		—
Mutual funds - institutional stock index	122,228		122,228		—		—
	$	403,752	$	403,752	$	—	$	—

	December 31, 2021
			Fair Value Measurements
	Fair value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Money market mutual funds	$	2,537	$	2,537	$	—	$	—
Mutual funds - value stock fund	36,477		36,477		—		—
Mutual funds - fixed income	200,349		200,349		—		—
Mutual funds - international stock	60,042		60,042		—		—
Mutual funds - institutional stock index	181,013		181,013		—		—
Commingled real estate funds	11,714		—		11,714		—
	$	492,132	$	480,418	$	11,714	$	—

The weighted average asset allocation of pension assets at December 31, 2022 were as follows:

	December 31,
	2022
Equities	66.8	%
Fixed income	32.2
Cash	1.0
Total	100.0	%

The Plan's asset allocation targets are as follows:

	Targets
Equities	65	%
Fixed income	34	%
Cash	1	%

The following tables present the assets that are measured at fair value on a recurring basis by level within the U.S. GAAP fair value hierarchy as reported on the Statements of Net Assets Available for Plan Benefits at December 31, 2022. A financial instrument's level within the fair value hierarchy's is based on the lowest level of input that is significant to the fair value measurement.

(14)    Employee Benefit Plans (continued)

Pension Plan and Post-retirement Plan Acquired-RSI (cont'd)

	December 31, 2022
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Money market mutual fund	$	70	$	70	$	—	$	—
Equities - long term growth	4,720		—		4,720		—
Fixed income - long duration	2,271		—		2,271		—
	$	7,061	$	70	$	6,991	$	—

Employee Stock Ownership Plan (ESOP) Disclosures

The ESOP shares were as follows:

	At December 31,
	2022		2021
	(In thousands)
Allocated shares	1,005		802
Unearned shares	3,475		3,702
Total ESOP shares	4,480		4,504
Fair value of unearned ESOP shares	$	75,129	$	77,226

Nonvested Restricted Stock Shares Activity

The following is a summary of the Company's restricted stock activity during the years ended December 31, 2022 and 2021:

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2021	1,263,169	$	15.66
Grants	50,203	17.86
Vested	(193,528)	15.58
Forfeited	(65,509)	15.62
Non-vested at December 31, 2021	1,054,335	$	15.78
Grants	123,182	21.29
Vested	(677,886)	15.73
Forfeited	(68,677)	16.54
Non-vested at December 31, 2022	430,954	$	17.31

Share-based Payment Arrangement, Option, Activity

The following is a summary of the Company's option activity during the years ended December 31, 2022 and 2021:

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding January 1, 2021	3,708,628	$	15.66	8.6	$	—
Granted	109,654	17.86		—	—
Exercised	(28,522)	15.60		—	—
Expired	(20,894)	15.60		—	—
Forfeited	(131,324)	15.66		—	—
Outstanding, December 31, 2021	3,637,542	$	15.78	7.6	$	18,654,905
Granted	363,629	21.08		—	—
Exercised	(315,703)	15.76		—	—
Expired	(10,116)	15.60		—	—
Forfeited	(238,483)	16.20		—	—
Outstanding, December 31, 2022	3,436,869	$	16.26	6.9	$	18,435,239
Options exercisable at December 31, 2022	1,812,871	$	15.68	6.6	$	10,767,256