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PARENT COMPANY STATEMENTS - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Operating activities: |  |  |
Net Income (Loss) | $ 131,924 | $ 188,081 | $ 189,694
Adjustments to reconcile net income to net cash provided by operating activities |  |  |
Gain on debt extinguishment | (242) | 0 | 0
Net change in other assets and other liabilities | 1,106 | (6,231) | 2,064
Net cash provided by operating activities | 228,420 | 214,600 | 202,546
Investing activities: |  |  |
Net cash provided by (used in) investing activities | 335,776 | (2,138,985) | (1,530,775)
Financing activities: |  |  |
Issuance of common stock | 1,015 | 1,184 | 9,821
Purchases of treasury stock | (30,233) | (16,614) | (5,106)
Increase in deferred compensation agreements | 217 | 236 | 252
Net cash (used in) provided by financing activities | (583,130) | 259,217 | 1,557,488
Change in cash and cash equivalents | (18,934) | (1,665,168) | 229,259
Cash and cash equivalents at beginning of year | 209,896 | 1,875,064 | 1,645,805
Cash and cash equivalents at end of year | 190,962 | 209,896 | 1,875,064
Supplemental disclosures of cash flow information: |  |  |
Cash paid for interest | 100,040 | 23,402 | 13,752
Supplemental disclosures of noncash financing activities |  |  |
Dividends declared and unpaid | 24,168 | 23,762 | 23,235
Parent Company |  |  |
Operating activities: |  |  |
Net Income (Loss) | 131,924 | 188,081 | 189,694
Adjustments to reconcile net income to net cash provided by operating activities |  |  |
Equity in undistributed net income of subsidiaries | (36,527) | (83,041) | (52,648)
Gain on debt extinguishment | (242) | 0 | 0
Net change in other assets and other liabilities | (573) | 2,155 | (3,050)
Net cash provided by operating activities | 94,582 | 107,195 | 133,996
Investing activities: |  |  |
Purchases of investment securities | (2,237) | (175) | (5,173)
(Capital contributions to)/Return of capital from | 0 | 0 | (12,918)
Net cash provided by (used in) investing activities | (2,237) | (175) | (18,091)
Financing activities: |  |  |
Repayment of advances from subsidiaries | (533) | (506) | (482)
Repayment of borrowings | (3,000) | 0 | (77,320)
Issuance of common stock | 10,284 | 8,922 | 16,155
Purchases of treasury stock | (30,233) | (16,614) | (5,106)
Increase in deferred compensation agreements | 217 | 236 | 252
Cash dividends paid | (95,102) | (93,387) | (91,051)
Net cash (used in) provided by financing activities | (118,367) | (101,349) | (157,552)
Change in cash and cash equivalents | (26,022) | 5,671 | (41,647)
Cash and cash equivalents at beginning of year | 160,045 | 154,374 | 196,021
Cash and cash equivalents at end of year | 134,023 | 160,045 | 154,374
Supplemental disclosures of cash flow information: |  |  |
Cash paid for interest | 45 | 180 | 560
Supplemental disclosures of noncash financing activities |  |  |
Dividends declared and unpaid | 24,168 | 23,763 | 23,235
Advances from subsidiaries | $ 533 | $ 506 | $ 482

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