Note 22 - Parent Company Financial Information - Condensed Statements of Income (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Net income | $ 136,940 | $ 93,092 | $ 81,479 | ||||||||
| Dividends on preferred stock | 63 | 62 | 47 | ||||||||
| Net income available to common stockholders | $ 36,205 | $ 34,560 | $ 33,509 | $ 32,603 | $ 21,119 | $ 25,259 | $ 24,133 | $ 22,519 | 136,877 | 93,030 | 81,432 |
| Parent Company [Member] | |||||||||||
| Dividends received from subsidiary | 23,000 | 6,500 | 2,500 | ||||||||
| Other income | 176 | 2 | 2 | ||||||||
| Total income | 23,176 | 6,502 | 2,502 | ||||||||
| Other expenses | 2,933 | 2,260 | 2,208 | ||||||||
| Total expenses | 2,933 | 2,260 | 2,208 | ||||||||
| Equity in undistributed earnings of subsidiary | 116,634 | 88,788 | 81,138 | ||||||||
| Net income | 136,877 | 93,030 | 81,432 | ||||||||
| Dividends on preferred stock | |||||||||||
| Net income available to common stockholders | $ 136,877 | $ 93,030 | $ 81,432 | ||||||||
| X | ||||||||||
- Definition Amount of operating dividend income on securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. No definition available.
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| X | ||||||||||
- Definition The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of revenue and income classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The amount of preferred stock dividends that is an adjustment to net income apportioned to common stockholders. No definition available.
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| X | ||||||||||
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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