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Note 5 - Credit Quality (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Financing Receivable, Collectively Evaluated for Impairment	$ 2,040,956		$ 1,672,634
Restructured Loans, Reserves	$ 500
Performing Status Returned Period (Month)	180 days
Financing Receivable, Troubled Debt Restructuring	$ 11,074		8,917
Financing Receivable, Number of Payment Deferrals	154
Financing Receivable, Deferred Payments	$ 6,610
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	209	$ 0
Impaired Loans [Member]
Financing Receivable, Collectively Evaluated for Impairment	30,520		24,640
Non-covered Loans [Member]
Financing Receivable, 90 Days or More Past Due, Still Accruing	191,000		144
Covered Loans [Member]
Financing Receivable, Troubled Debt Restructuring	$ 0		$ 0

X

- Definition

Deferred amounts on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19.

+ References

No definition available.

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X

- Definition

Number of payment deferrals on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19.

+ References

No definition available.

+ Details

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X

- Definition

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+ References

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- Definition

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+ References

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X

- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

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X

- Definition

Amount of financing receivable modified as troubled debt restructuring.

+ References

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- Definition

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+ References

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Amount of financing receivable 90 days or more past due and still accruing.

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