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CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Statement of Financial Position [Abstract]    
Estimated Fair Value $ 18,082 $ 8,461
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares issued (in shares) 46,245,050 27,798,283
Common stock, shares outstanding (in shares) 46,245,050 27,798,283
Accumulated other comprehensive income (loss), tax (benefit) (in dollars) $ 231 $ (1,978)