Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Securities held to maturity, allowance for credit losses	$ 7	$ 0
Securities held to maturity, fair value	282,035	363,259
Loans, allowance for credit losses	52,420	30,482
Debt issuance costs	$ 1,377	$ 727
Preferred stock, par value	$ 100
Preferred stock, shares authorized	210,000
Preferred stock, shares issued	173,282	173,282
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	16,099,556	16,099,556
Treasury stock, shares	57,630	96,657
Series A 3% Preferred Stock [Member]
Preferred stock, par value	$ 100	$ 100
Preferred stock, shares authorized	1,533	1,533
Preferred stock, shares issued	1,435	1,435
Preferred stock, dividend percentage	3.00%	3.00%
Series B-1 8.48% Preferred Stock [Member]
Preferred stock, par value	$ 100	$ 100
Preferred stock, shares authorized	200,000	200,000
Preferred stock, shares issued	171,847	171,847
Preferred stock, dividend percentage	8.48%	8.48%