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Note 10 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred Tax Assets |  |
Loan loss allowance, due to differences in computation of bad debts | $ 38,936 | $ 37,567
Share-based compensation | 2,945 | 3,260
Non-accrual interest | 1,005 | 2,277
Write-down on equity securities and venture capital investments | 2,010 | 2,095
Depreciation and amortization | 0 | 3,798
State tax | 4,540 | 4,344
Unrealized loss on interest rate swaps | 1,599 | 190
Unrealized loss on securities available-for-sale, net | 0 | 3,864
Unrealized loss on equity securities | 0 | 843
Tax credits carried forward | 9,473 | 9,473
Net operating loss carried forward | 14,247 | 17,098
Other, net | 5,012 | 4,782
Gross deferred tax assets | 79,767 | 89,591
Deferred Tax Liabilities |  |
Deferred loan costs | (9,778) | (8,839)
Depreciation and amortization | (1,606) | 0
Unrealized gain on securities available-for-sale, net | (5,990) | 0
Unrealized gain on equity securities | (668) | 0
Dividends on Federal Home Loan Bank common stock | (978) | (956)
Other, net | (3,307) | (4,008)
Gross deferred tax liabilities | (22,327) | (13,803)
Net deferred tax assets | $ 57,440 | $ 75,788

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