CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
CONSOLIDATED BALANCE SHEETS
Held to maturity, fair value	$ 603,360	$ 441,052
Portfolio Loans, allowance for loan losses (in dollars)	$ 50,648	$ 53,582
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	66,666,667	66,666,667
Common stock, shares issued	49,185,581	49,185,581
Common stock shares held in treasury	310,745	500,638