Benefit Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Apr. 01, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Salary expense		$ 54,600	$ 29,000	$ 25,100
Expense for contributions to savings and investment plan		$ 14,000	10,700	10,100
Maximum annual salary deferral, percent		5.00%
Vesting period of employer matching contributions		2 years
Unsecured general liability		$ 2,500	2,400
Stock-based compensation expense		28,788	20,887	16,154
Unrecognized stock-based compensation		$ 33,600
Average remaining vesting, years		1 year 10 months 24 days
Award vesting period		1 year
Stock Options and Restricted Stock
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Stock-based compensation expense		$ 28,800	20,900	16,500
Stock awards granted		$ 2,300	$ 1,600	$ 1,500
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
Vesting percentage		33.33%
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)		9,000,000
Shares of common stock available for issuance (in shares)		5,000,000
2016 Incentive Compensation Plan | Common Stock
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Reduction of shares available to issue for shares granted after 2020 year end (in shares)		1
Employee Stock Incentive Plan | Performance-Based RSU
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Weighted average grant date fair value (usd per share)		$ 14.72	$ 12.36	$ 10.99
Employee Stock Incentive Plan | Time-Based RSU
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Weighted average grant date fair value (usd per share)		$ 13.22	$ 12.01	$ 10.29
Pension
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Discount rate used to compute the obligation		5.31%	2.87%
Projected benefit obligation		$ 175,496	$ 180,204
Obligation included in other comprehensive loss, net of tax		38,535	25,206
Benefit expense		$ (14,350)	(11,181)	$ (11,121)
OPEB
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Discount rate used to compute the obligation		5.29%
Projected benefit obligation		$ 5,981
Obligation included in other comprehensive loss, net of tax		(632)
Benefit expense		79
Nonqualified Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Projected benefit obligation		14,899	18,911
Expense for contributions to savings and investment plan		447	415	372
Nonqualified Plan | Oritani Financial Corp.
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Split dollar life insurance liability		1,600	1,700
Nonqualified Plan | Oritani Financial Corp. | Split-Dollar Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Benefit expense		121	104	812
Nonqualified Plan | Former Directors And Senior Management
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Projected benefit obligation		297	348
Obligation included in other comprehensive loss, net of tax		585	660
Obligation included in other comprehensive loss, tax		231	257
Obligation included in other comprehensive loss, net of tax, amount expected to be reclassified		817
Nonqualified Plan | Other pension plan | Oritani Financial Corp.
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Projected benefit obligation		653	979
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		1,100	1,300
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		$ 12,300	13,900
Benefits payment period		20 years
Benefit expense		$ 1,800	$ 357	$ 1,500
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