Note 12 - Income Taxes	3 Months Ended
Mar. 31, 2020
Notes to Financial Statements
Income Tax Disclosure [Text Block]	12. Income Taxes The effective tax rate for the first quarter of 2020 was 16.3% compared to 21.8% for the first quarter of 2019. The effective tax rate includes the impact of low-income housing and alternative energy investment tax credits. Income tax expense for the first quarter of 2020 was increased by $0.3 million related to a tax deficiency from the distribution of restricted stock units. The Company’s tax returns are open for audit by the Internal Revenue Service back to 2016 and by the California Franchise Tax Board back to 2015. The Company is currently under audit by the Internal Revenue Service for 2017. It is reasonably possible that unrecognized tax benefits could change significantly over the next twelve months. The Company does not expect that any such changes would have a material impact on its annual effective tax rate.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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