CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Securities—trading, amortized cost basis	$ 27,203	$ 27,203
Securities—available-for-sale, amortized cost basis	1,529,946	1,648,421
Debt Securities, Held-to-maturity, Fair Value	237,805	232,537
Loans Held-for-sale, Fair Value	$ 199,400	$ 164,800
SHAREHOLDERS’ EQUITY
Preferred stock, share par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares outstanding	0	0
Voting Common Stock [Member]
SHAREHOLDERS’ EQUITY
Common stock, share par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	35,712,834	35,107,839
Common stock, shares outstanding	35,712,834	35,107,839
Nonvoting Common Stock [Member]
SHAREHOLDERS’ EQUITY
Common stock, share par value	$ 0.01	$ 0.01
Common stock, shares authorized	5,000,000	5,000,000
Common stock, shares issued	39,192	74,933
Common stock, shares outstanding	39,192	74,933