CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Securities available-for-sale, encumbered	$ 293,968	$ 5,339
Allowance for credit loss	1,467	1,715
Securities held-to-maturity, net estimated fair value	1,152,744	968,466
Securities held-to-maturity, net encumbered	756,706	418,719
Equity investments, encumbered	40,122
Allowance for loan credit losses	$ 48,850	$ 60,735
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference	$ 1	$ 1
Preferred stock, shares authorized (shares)	5,000,000	5,000,000
Preferred stock, shares issued (shares)	57,370	57,370
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	150,000,000	150,000,000
Common stock, shares issued (shares)	61,535,381	61,040,894
Common stock, shares outstanding (shares)	59,175,046	60,392,043
Treasury stock, shares (shares)	2,360,335	648,851