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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
ASSETS
Investment securities, held-to-maturity, fair value	$ 83,751	$ 85,345
SHAREHOLDERS' EQUITY
Common stock, authorized (in shares)	75,000,000	75,000,000
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, issued (in shares)	56,446,088	55,861,150
Common stock, outstanding (in shares)	56,446,088	55,861,150
Treasury stock (in shares)	100,000	100,000

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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