CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Investment securities, held to maturity, fair value	$ 329,881	$ 175,175
Preferred Stock, par value (in dollar per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized	3,000,000	3,000,000
Preferred Stock, shares outstanding	0	0
Preferred Stock, shares issued	0	0
Common Stock, par value (in dollar per share)	$ 0.01	$ 0.01
Common Stock, shares authorized	90,000,000	90,000,000
Common Stock, shares issued	16,874,279	16,790,573
Common Stock, shares outstanding	16,874,279	16,790,573