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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash Flows From Operating Activities |  |  |  |
Net income |  | $ 277,538 | $ 226,409 | $ 238,206
Adjustments to reconcile net income to cash provided by operating activities: |  |  |  |
Depreciation |  | 27,276 | 28,911 | 26,719
Amortization of other intangible assets |  | 11,336 | 14,091 | 16,911
Amortization of tax credit investments |  | 6,770 | 18,788 | 2,749
Net premium amortization on investment securities |  | 16,305 | 18,798 | 19,210
Accretion income related to acquired loans |  | (16,747) | (23,331) | (42,772)
Share-based compensation expense |  | 7,497 | 7,707 | 7,993
Provision for credit losses | [1] | (28,812) | 38,395 | 4,747
Debt securities (gains) losses, net |  | (4,327) | (10,767) | (1,923)
Net (gains) losses on sales of loans and other assets |  | (36,677) | (23,787) | (7,370)
Increase in cash surrender value of company-owned life insurance |  | (10,589) | (12,031) | (11,539)
Residential real estate loans originated for sale |  | (1,215,015) | (1,432,488) | (854,848)
Proceeds from sales of residential real estate loans |  | 1,274,812 | 1,455,067 | 834,024
(Increase) decrease in interest receivable |  | 1,198 | (183) | 4,340
(Increase) decrease in other assets |  | 2,641 | (105,969) | 22,253
Increase (decrease) in accrued expenses and other liabilities |  | 17,174 | 20,210 | (24,944)
Net cash flows provided by (used in) operating activities |  | 330,380 | 219,820 | 233,756
Cash Flows From Investing Activities |  |  |  |
Purchases of investment securities available-for-sale |  | (3,321,653) | (2,803,406) | (2,366,089)
Purchases of Federal Home Loan Bank/Federal Reserve Bank stock |  | 0 | (10,025) | (21,142)
Purchases of equity securities |  | (11,000) | 0 | 0
Proceeds from maturities, prepayments, and calls of investment securities available-for-sale |  | 1,511,510 | 1,990,383 | 1,175,272
Proceeds from sales of investment securities available-for-sale |  | 198,886 | 299,885 | 424,140
Proceeds from maturities, prepayments, and calls of investment securities held-to-maturity |  | 0 | 0 | 115,648
Proceeds from sales of investment securities held-to-maturity |  | 0 | 0 | 9,921
Proceeds from sales of Federal Home Loan Bank/Federal Reserve Bank stock |  | 58 | 4,691 | 23
Proceeds from sales of equity securities |  | 544 | 39,296 | 130
Loan originations and payments, net |  | 206,145 | (1,644,119) | 163,551
Proceeds from company-owned life insurance death benefits |  | 3,375 | 4,888 | 6,796
Proceeds from sale of premises and equipment and other assets |  | 29,244 | 7,826 | 3,769
Purchases of premises and equipment and other assets |  | (48,692) | (30,871) | (37,423)
Net cash flows provided by (used in) investing activities |  | (1,431,583) | (2,141,452) | (525,404)
Net increase (decrease) in: |  |  |  |
Deposits |  | 1,531,742 | 2,484,056 | 203,448
Federal funds purchased and interbank borrowings |  | (890) | (349,248) | 80,279
Securities sold under agreements to repurchase |  | (38,891) | 103,384 | (34,512)
Other borrowings |  | 36,187 | 4,171 | (4,377)
Payments for maturities of Federal Home Loan Bank advances |  | (146,505) | (751,505) | (377,978)
Payments for modification of Federal Home Loan Bank advances |  | (2,156) | (31,124) | 0
Proceeds from Federal Home Loan Bank advances |  | 50,000 | 950,000 | 575,000
Cash dividends paid on common stock |  | (92,829) | (92,946) | (89,474)
Common stock repurchased |  | (3,731) | (82,358) | (102,413)
Proceeds from exercise of stock options |  | 0 | 0 | 280
Common stock issued |  | 583 | 577 | 567
Net cash flows provided by (used in) financing activities |  | 1,333,510 | 2,235,007 | 250,820
Net increase (decrease) in cash and cash equivalents |  | 232,307 | 313,375 | (40,828)
Cash and cash equivalents at beginning of period |  | 589,712 | 276,337 | 317,165
Cash and cash equivalents at end of period |  | $ 822,019 | $ 589,712 | $ 276,337
[1] | Beginning January 1, 2020, with the adoption of CECL, calculation is based on current expected credit loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Amount of cash inflow for proceeds from settlement of corporate-owned life insurance policy, classified as investing activities. Includes, but is not limited to, bank-owned life insurance policy. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21C -URI http://asc.fasb.org/extlink&oid=123570139&loc=SL94080552-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
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- Definition Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3151-108585 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
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- Definition The cash flow from investments sold under the agreement to repurchase such investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3098-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3095-108585 + Details
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