CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Securities—trading, amortized cost basis	$ 27,203	$ 27,246
Securities—available-for-sale, amortized cost basis	1,648,421	926,112
Debt Securities, Held-to-maturity, Fair Value	232,537	262,188
Loans Held-for-sale, Fair Value	$ 164,800	$ 32,400
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	35,107,839	32,626,456
Common stock, shares outstanding	35,107,839	32,626,456
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	74,933	100,029
Common stock, shares outstanding	74,933	100,029