Note 6 - Investments in Affordable Housing and Alternative Energy Partnerships - Unfunded Commitments Future Estimated Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
2018	$ 54,817
2019	37,921
2020	16,528
2021	11,238
2022	728
Thereafter	3,425
Total unfunded commitments	$ 124,657	$ 115,038

Amount of scheduled funding for unfunded commitments in the next 12 months for affordable housing investments.

No definition available.

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Amount of scheduled funding for unfunded commitments in the fifth fiscal year following the latest fiscal year for affordable housing investments.

No definition available.

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Amount of scheduled funding for unfunded commitments in the fourth fiscal year following the latest fiscal year for affordable housing investments.

No definition available.

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Amount of scheduled funding for unfunded commitments in the third fiscal year following the latest fiscal year for affordable housing investments.

No definition available.

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Amount of scheduled funding for unfunded commitments in the second fiscal year following the latest fiscal year for affordable housing investments.

No definition available.

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Amount of scheduled funding for unfunded commitments after the fifth fiscal year following the latest fiscal year for affordable housing investments.

No definition available.

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Other liabilities from affordable housing unfunded commitments.

No definition available.

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