| **CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands**                                       | 3 Months Ended | 6 Months Ended |
|------------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Statement of Comprehensive Income [Abstract]**                                                                                         |           |           |   |   |
| Net income                                                                                                                               | $ 39,634       | $ 24,136       | $ 76,313 | $ 47,329 |
| **Other comprehensive income (loss), net of tax:**                                                                                       |           |           |   |   |
| Unrealized holding gain (loss) on securities available for sale arising during the period, net of tax of $683, $3,033, $4,874 and $8,476 | (2,570)        | 5,632          | (20,268) | 15,741 |
| Unrealized gain on cash flow hedges arising during the period, net of tax of $61, $142, $167 and $131                                    | 230            | (262)          | 874 | (239) |
| Reclassification adjustment for net gains included in net income, net of tax of $214, $110, $516 and $226                                | (803)          | (206)          | (1,940) | (420) |
| Defined benefit pension plan amortization of prior service cost, net of tax of $31 and $63                                               | 0              | (58)           | 0 | (117) |
| Total other comprehensive income (loss), net of tax                                                                                      | (3,143)        | 5,106          | (21,334) | 14,965 |
| Comprehensive income                                                                                                                     | $ 36,491       | $ 29,242       | $ 54,979 | $ 62,294 |

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| - Definition
Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.
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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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Amount, after tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.
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Amount after tax and reclassification adjustments of other comprehensive income (loss).
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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.
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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).
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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.
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