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Note 13 - Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2019
Notes Tables |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
|  | March 31, 2019 |  |  |  |  |
|  | Fair Value Measurements Using |  |  | Total Fair Value |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Measurements |
|  | (In thousands) |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 149,240 |  |  | $ | — |  |  | $ | — |  |  | $ | 149,240 |
U.S. government agency entities |  |  | — |  |  |  | 5,531 |  |  |  | — |  |  |  | 5,531 |
U.S. government sponsored entities |  |  | — |  |  |  | 393,274 |  |  |  | — |  |  |  | 393,274 |
Mortgage-backed securities |  |  | — |  |  |  | 695,961 |  |  |  | — |  |  |  | 695,961 |
Collateralized mortgage obligations |  |  | — |  |  |  | 881 |  |  |  | — |  |  |  | 881 |
Corporate debt securities |  |  | — |  |  |  | 64,966 |  |  |  | — |  |  |  | 64,966 |
Total securities available-for-sale |  | $ | 149,240 |  |  | $ | 1,160,613 |  |  | $ | — |  |  | $ | 1,309,853 |
Equity securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual funds |  | $ | 6,171 |  |  | $ | — |  |  | $ | — |  |  | $ | 6,171 |
Preferred stock of government sponsored entities |  |  | 11,443 |  |  |  | — |  |  |  | — |  |  |  | 11,443 |
Other equity securities |  |  | 11,647 |  |  |  | — |  |  |  | — |  |  |  | 11,647 |
Total equity securities |  | $ | 29,261 |  |  | $ | — |  |  | $ | — |  |  | $ | 29,261 |
Warrants |  | $ | — |  |  | $ | — |  |  | $ | 181 |  |  | $ | 181 |
Interest rate swaps |  |  | — |  |  |  | 4,480 |  |  |  | — |  |  |  | 4,480 |
Foreign exchange contracts |  |  | — |  |  |  | 459 |  |  |  | — |  |  |  | 459 |
Total assets |  | $ | 178,501 |  |  | $ | 1,165,552 |  |  | $ | 181 |  |  | $ | 1,344,234 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option contracts |  | $ | — |  |  | $ | 12 |  |  | $ | — |  |  | $ | 12 |
Interest rate swaps |  |  | — |  |  |  | 5,727 |  |  |  | — |  |  |  | 5,727 |
Foreign exchange contracts |  |  | — |  |  |  | 645 |  |  |  | — |  |  |  | 645 |
Total liabilities |  | $ | — |  |  | $ | 6,384 |  |  | $ | — |  |  | $ | 6,384 |
|  | December 31, 2018 |  |  |  |  |
|  | Fair Value Measurements Using |  |  | Total Fair Value |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Measurements |
|  | (In thousands) |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 124,751 |  |  | $ | — |  |  | $ | — |  |  | $ | 124,751 |
U.S. government agency entities |  |  | — |  |  |  | 5,871 |  |  |  | — |  |  |  | 5,871 |
U.S. government sponsored entities |  |  | — |  |  |  | 388,363 |  |  |  | — |  |  |  | 388,363 |
Mortgage-backed securities |  |  | — |  |  |  | 656,744 |  |  |  | — |  |  |  | 656,744 |
Collateralized mortgage obligations |  |  | — |  |  |  | 977 |  |  |  | — |  |  |  | 977 |
Corporate debt securities |  |  | — |  |  |  | 65,803 |  |  |  | — |  |  |  | 65,803 |
Total securities available-for-sale |  | $ | 124,751 |  |  | $ | 1,117,758 |  |  | $ | — |  |  | $ | 1,242,509 |
Equity securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual funds |  | $ | 6,094 |  |  | $ | — |  |  | $ | — |  |  | $ | 6,094 |
Preferred stock of government sponsored entities |  |  | 7,822 |  |  |  | — |  |  |  | — |  |  |  | 7,822 |
Other equity securities |  |  | 11,182 |  |  |  | — |  |  |  | — |  |  |  | 11,182 |
Total equity securities |  | $ | 25,098 |  |  | $ | — |  |  | $ | — |  |  | $ | 25,098 |
Warrants |  | $ | — |  |  | $ | — |  |  | $ | 184 |  |  | $ | 184 |
Interest rate swaps |  |  | — |  |  |  | 7,810 |  |  |  | — |  |  |  | 7,810 |
Foreign exchange contracts |  |  | — |  |  |  | 397 |  |  |  | — |  |  |  | 397 |
Total assets |  | $ | 149,849 |  |  | $ | 1,125,965 |  |  | $ | 184 |  |  | $ | 1,275,998 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option contracts |  | $ | — |  |  | $ | 6 |  |  | $ | — |  |  | $ | 6 |
Interest rate swaps |  |  | — |  |  |  | 1,543 |  |  |  | — |  |  |  | 1,543 |
Foreign exchange contracts |  |  | — |  |  |  | 1,763 |  |  |  | — |  |  |  | 1,763 |
Total liabilities |  | $ | — |  |  | $ | 3,312 |  |  | $ | — |  |  | $ | 3,312 |
Fair Value Measurements, Nonrecurring [Table Text Block] |
|  | As of March 31, 2019 |  |  |  |  |  |  | Total Losses |
|  | Fair Value Measurements Using |  |  | Total Fair Value |  |  | For the Three Months Ended |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Measurements |  |  | March 31, 2019 |  |  | March 31, 2018 |
|  | (In thousands) |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impaired loans by type: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans |  | $ | — |  |  | $ | — |  |  | $ | 440 |  |  | $ | 440 |  |  | $ | — |  |  | $ | — |
Commercial mortgage loans |  |  | — |  |  |  | — |  |  |  | 19,571 |  |  |  | 19,571 |  |  |  | — |  |  |  | — |
Residential mortgage loans and equity lines |  |  | — |  |  |  | — |  |  |  | 5,973 |  |  |  | 5,973 |  |  |  | — |  |  |  | — |
Total impaired loans |  |  | — |  |  |  | — |  |  |  | 25,984 |  |  |  | 25,984 |  |  |  | — |  |  |  | — |
Other real estate owned (1) |  |  | — |  |  |  | 8,850 |  |  |  | 4,343 |  |  |  | 13,193 |  |  |  | 72 |  |  |  | 33 |
Investments in venture capital and private company stock |  |  | — |  |  |  | — |  |  |  | 2,061 |  |  |  | 2,061 |  |  |  | 2 |  |  |  | 173 |
Total assets |  | $ | — |  |  | $ | 8,850 |  |  | $ | 32,388 |  |  | $ | 41,238 |  |  | $ | 74 |  |  | $ | 206 |
|  | As of December 31, 2018 |  |  |  |  |  |  | Total Losses/(Gains) |
|  | Fair Value Measurements Using |  |  | Total Fair Value |  |  | For the Twelve Months Ended |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Measurements |  |  | December 31, 2018 |  |  | December 31, 2017 |
|  | (In thousands) |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impaired loans by type: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans |  | $ | — |  |  | $ | — |  |  | $ | 4,733 |  |  | $ | 4,733 |  |  | $ | — |  |  | $ | 25 |
Commercial mortgage loans |  |  | — |  |  |  | — |  |  |  | 26,186 |  |  |  | 26,186 |  |  |  | — |  |  |  | — |
Residential mortgage loans and equity lines |  |  | — |  |  |  | — |  |  |  | 6,850 |  |  |  | 6,850 |  |  |  | — |  |  |  | — |
Total impaired loans |  |  | — |  |  |  | — |  |  |  | 37,769 |  |  |  | 37,769 |  |  |  | — |  |  |  | 25 |
Other real estate owned (1) |  |  | — |  |  |  | 9,023 |  |  |  | 4,343 |  |  |  | 13,366 |  |  |  | (619 | ) |  |  | 457 |
Investments in venture capital and private company stock |  |  | — |  |  |  | — |  |  |  | 2,162 |  |  |  | 2,162 |  |  |  | 330 |  |  |  | 392 |
Total assets |  | $ | — |  |  | $ | 9,023 |  |  | $ | 44,274 |  |  | $ | 53,297 |  |  | $ | (289 | ) |  | $ | 874 |

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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