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CONSOLIDATED STATEMENTS OF CONDITION (CURRENT PERIOD UNAUDITED) (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Available-for-sale Securities, Noncurrent $ 915,099 $ 933,399
Debt Securities, Held-to-maturity, Fair Value 1,335 1,291
Loans held for sale $ 13,088 $ 4,314
Common stock, no par value (dollars per share) $ 0 $ 0
Common stock, authorized (in shares) 40,000,000 40,000,000
Common stock, issued (in shares) 15,457,480 15,591,914
Common stock, outstanding (in shares) 15,457,480 15,591,914