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Parent Company Financial Statements | 12 Months Ended
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Dec. 31, 2023
Condensed Financial Information Disclosure [Abstract] |
Parent Company Financial Statements | Parent Company Financial Statements Summary financial information for Columbia Banking System, Inc. on a standalone basis is as follows: Condensed Balance Sheets December 31, 2023 and 2022
(in thousands) | December 31, 2023 |  | December 31, 2022
ASSETS |  |  |
Non-interest-bearing deposits with subsidiary bank | $ | 45,895 |  |  | $ | 143,130 |
Investments in: |  |  |
Bank subsidiary | 5,367,612 |  |  | 2,744,195 |
Non-bank subsidiaries | 18,951 |  |  | 16,932 |
Other assets | 7,781 |  |  | 4,048 |
Total assets | $ | 5,440,239 |  |  | $ | 2,908,305 |
LIABILITIES AND SHAREHOLDERS' EQUITY |  |  |
Payable to bank subsidiary | $ | 444 |  |  | $ | 128 |
Other liabilities | 20,426 |  |  | 16,899 |
Junior subordinated debentures, at fair value | 316,440 |  |  | 323,639 |
Junior and other subordinated debentures, at amortized cost | 107,895 |  |  | 87,813 |
Total liabilities | 445,205 |  |  | 428,479 |
Shareholders' equity | 4,995,034 |  |  | 2,479,826 |
Total liabilities and shareholders' equity | $ | 5,440,239 |  |  | $ | 2,908,305 |
Condensed Statements of Operations Years Ended December 31, 2023, 2022, and 2021
(in thousands) | 2023 |  | 2022 |  | 2021
INCOME |  |  |  |  |
Dividends from bank subsidiary | $ | 353,000 |  |  | $ | 192,000 |  |  | $ | 398,000 |
Dividends from non-bank subsidiaries | 10,115 |  |  | 2,104 |  |  | 9,371 |
Other income | 453 |  |  | 127 |  |  | 5,007 |
Total income | 363,568 |  |  | 194,231 |  |  | 412,378 |
EXPENSE |  |  |  |  |
Management fees paid to subsidiaries | 1,877 |  |  | 1,434 |  |  | 1,590 |
Other expenses | 44,493 |  |  | 22,396 |  |  | 17,834 |
Total expenses | 46,370 |  |  | 23,830 |  |  | 19,424 |
Income before income tax benefit and equity in undistributed earnings of subsidiaries | 317,198 |  |  | 170,401 |  |  | 392,954 |
Income tax benefit | (10,019) |  |  | (4,677) |  |  | (3,470) |
Net income before equity in undistributed earnings of subsidiaries | 327,217 |  |  | 175,078 |  |  | 396,424 |
Equity in undistributed earnings losses of subsidiaries | 21,498 |  |  | 161,674 |  |  | 23,876 |
Net income | $ | 348,715 |  |  | $ | 336,752 |  |  | $ | 420,300 |
Condensed Statements of Cash Flows Years Ended December 31, 2023, 2022, and 2021
(in thousands) | 2023 |  | 2022 |  | 2021
OPERATING ACTIVITIES: |  |  |  |  |
Net income | $ | 348,715 |  |  | $ | 336,752 |  |  | $ | 420,300 |
Adjustment to reconcile net income to net cash provided by operating activities: |  |  |  |  |
Gain on sale of Umpqua Investments, Inc. | — |  |  | — |  |  | (4,444) |
Equity in undistributed earnings of subsidiaries | (21,498) |  |  | (161,674) |  |  | (23,876) |
Depreciation, amortization, and accretion | (228) |  |  | (228) |  |  | (228) |
Net increase in other assets | (176) |  |  | (2,334) |  |  | (1,001) |
Net (decrease) increase in other liabilities | (5,472) |  |  | 2,212 |  |  | 2,589 |
Net cash provided by operating activities | 321,341 |  |  | 174,728 |  |  | 393,340 |
INVESTING ACTIVITIES: |  |  |  |  |
Net increase in advances to subsidiaries | (143,535) |  |  | (121,409) |  |  | (313) |
Net cash received from sale of Umpqua Investments, Inc. | — |  |  | — |  |  | 10,781 |
Net cash (used in) provided by investing activities | (143,535) |  |  | (121,409) |  |  | 10,468 |
FINANCING ACTIVITIES: |  |  |  |  |
Net increase (decrease) in advances from subsidiaries | 317 |  |  | (379) |  |  | 409 |
Dividends paid on common stock | (270,261) |  |  | (182,273) |  |  | (183,734) |
Repurchases and retirement of common stock | (6,282) |  |  | (4,163) |  |  | (80,690) |
Net proceeds from issuance of common stock | 1,185 |  |  | 54 |  |  | 34 |
Net cash used in financing activities | (275,041) |  |  | (186,761) |  |  | (263,981) |
Net (decrease) increase in cash and cash equivalents | (97,235) |  |  | (133,442) |  |  | 139,827 |
Cash and cash equivalents, beginning of year | 143,130 |  |  | 276,572 |  |  | 136,745 |
Cash and cash equivalents, end of year | $ | 45,895 |  |  | $ | 143,130 |  |  | $ | 276,572 |

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- Definition The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 205 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04(Schedule I)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480922/205-10-S99-6 Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481231/810-10-45-11 + Details
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