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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Investment securities, held to maturity fair value	$ 206,730	$ 201,085
Allowance for loan losses	$ 17,071	$ 16,394
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value
Common stock, shares authorized	99,000,000	99,000,000
Common stock, shares issued	38,387,709	38,323,604
Common stock, shares outstanding	38,362,640	38,294,729

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Face amount per share of no-par value common stock.

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

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