Business Combinations - Narrative (Details) - USD ($) $ in Thousands		1 Months Ended	9 Months Ended
	Jul. 01, 2022	Jul. 31, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Business Acquisition [Line Items]
Goodwill resulting from acquisition of Prudential Bancorp			$ 550,522		$ 534,266
Net (decrease) increase in time deposits			$ (308,503)	$ (508,678)
Prudential
Business Acquisition [Line Items]
Percent of outstanding common stock acquired	100.00%
Percent of consideration in equity	80.00%
Percent of consideration in cash	20.00%
Goodwill resulting from acquisition of Prudential Bancorp	$ 16,256
Loans	554,288
Investment securities	287,126
Increase to allowance for credit losses	9,100
Allowance for credit losses at acquisition	1,135
Increase in premises and equipment	7,100
Net (decrease) increase in time deposits	1,900
Prudential | Core Deposits
Business Acquisition [Line Items]
Intangible assets acquired	$ 8,200
Amortization period of acquired intangible assets	7 years
Prudential | Acquisition-related Costs
Business Acquisition [Line Items]
Charitable donation		$ 2,000