CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for Credit Losses	$ 1,503	$ 1,715
Securities held-to-maturity, net encumbered	1,143,381	968,466
Allowance for loan credit losses	$ 50,153	$ 60,735
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference, value	$ 1	$ 1
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	57,370	57,370
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	61,526,126	61,040,894
Common stock, shares outstanding (in shares)	59,417,266	60,392,043
Treasury stock, shares (in shares)	2,108,860	648,851