Derivative Instruments and Hedge Activities - Summary of Company's Interest Rate Derivative and Offsetting Positions (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Gross amounts recognized	$ 16,949	$ 17,149
Net amount presented in the Consolidated Statements of Financial Condition	16,949	17,149
Gross amounts not offset in the Consolidated Statements of Financial Condition
Offsetting derivative positions	(3,979)
Collateral posted	(12,029)	(17,149)
Net credit exposure	941
Derivative liabilities fair value	(12,380)	(18,133)
Net amount presented in the Consolidated Statements of Financial Condition	(12,380)	(18,133)
Gross amounts not offset in the Consolidated Statements of Financial Condition
Offsetting derivative positions	3,979
Collateral posted	$ 8,401	$ 18,133