Benefit Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Apr. 01, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Projected benefit obligation		$ 14,571	$ 14,899
Salary expense		57,400	54,600	$ 29,000
Expense for contributions to savings and investment plan		$ 16,000	14,000	10,700
Maximum annual salary deferral, percent		5.00%
Vesting period of employer matching contributions		2 years
Unsecured general liability		$ 3,600	2,500
Stock-based compensation expense		33,102	28,788	20,887
Unrecognized stock-based compensation		$ 31,600
Average remaining vesting, years		1 year 8 months 26 days
Award vesting period		1 year
Vesting percentage		33.33%
Stock Options and Restricted Stock
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Stock-based compensation expense		$ 33,100	28,800	20,900
Stock awards granted		$ 2,300	$ 2,300	1,600
Share-based compensation, expiration period		1 year
Performance Shares
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period		3 years
RSUs
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period		3 years
Common Stock
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Shares of common stock available for issuance (in shares)	2,700,000
Average price per share ( in usd per share)	$ 8.47
2021 Incentive Compensation Plan | Common Stock
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Share-based compensation, shares authorized (up to) (in shares)		14,500,000
2023 Incentive Compensation Plan | Common Stock
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Shares of common stock available for issuance (in shares)		12,500,000
Pension
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Discount rate used to compute the obligation		5.00%	5.31%
Projected benefit obligation		$ 179,918	$ 175,496
Obligation included in other comprehensive loss, net of tax		33,265	38,535
Benefit expense		$ (13,676)	$ (14,350)	(11,181)
OPEB
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Discount rate used to compute the obligation		4.97%	5.29%
Projected benefit obligation		$ 5,451	$ 5,981
Obligation included in other comprehensive loss, net of tax		(715)	(632)
Benefit expense		225	79
Nonqualified Plan | Former Directors And Senior Management
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Obligation included in other comprehensive loss, net of tax, amount expected to be reclassified		717
Nonqualified Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Expense for contributions to savings and investment plan		747	447	415
Nonqualified Plan | Former Directors And Senior Management
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Projected benefit obligation		246	297
Obligation included in other comprehensive loss, net of tax		519	585
Obligation included in other comprehensive loss, tax		198	231
Nonqualified Plan | Other pension plan | Non Qualified Plans For Former Directors
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Projected benefit obligation		963	1,100
Nonqualified Plan | Supplemental Executive Retirement Income Agreement | Oritani Financial Corp.
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Projected benefit obligation		$ 11,600	12,300
Benefits payment period		20 years
Benefit expense		$ 1,500	$ 1,800	$ 357
Fixed income securities | Qualified Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Target asset allocation percentage		50.00%
Fixed income securities | Qualified Plan | Consumer Price Index
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cumulative annual real return, period		5 years
Fixed income securities | Qualified Plan | Merrill Lynch Intermediate Government/Corporate Index
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cumulative annual real return, period		3 years
Equity securities | Qualified Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Target asset allocation percentage		50.00%
Equity securities | Qualified Plan | Consumer Price Index
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cumulative annual real return, period		5 years
Equity securities | Qualified Plan | S&P 500 Index
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cumulative annual real return, period		3 years
High-Quality Fixed Income | Qualified Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Target asset allocation percentage		55.00%
Defined Benefit Plan, Marketable Equities | Qualified Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Target asset allocation percentage		45.00%