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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating activities |  |  |  |
Net income |  | $ 154,885 | $ 104,388 | $ 121,021
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |
Provision for loan losses | [1] | (8,257) | 51,134 | 25,412
Depreciation and amortization of premises and equipment |  | 9,896 | 9,772 | 9,497
Net amortization on securities |  | 5,832 | 4,369 | 3,375
Amortization of intangible assets |  | 2,808 | 3,395 | 3,579
Amortization of operating lease right-of-use assets |  | 7,176 | 7,382 | 7,239
Excess tax benefit on stock-based compensation |  | (385) | (181) | (409)
Stock-based compensation expense |  | 4,414 | 4,581 | 4,210
Bank owned life insurance income |  | (6,217) | (5,743) | (5,355)
Amortization of subordinated debt issuance costs |  | 438 | 230 | 0
Proceeds from sale of loans held for sale |  | 55,065 | 168,707 | 175,829
Originations of loans held for sale |  | (54,608) | (158,279) | (181,261)
Net gains on sale of loans held for sale |  | (361) | (1,989) | (786)
Net security (gains) losses |  | (566) | 388 | (4,213)
Net losses (gains) on sale of other real estate owned |  | 182 | (96) | 227
Lease termination losses |  | 0 | 4,284 | 1,872
Net change in other assets and other liabilities |  | (12,667) | (49,930) | (6,774)
Net cash provided by operating activities |  | 157,635 | 142,412 | 153,463
Investing activities |  |  |  |
Net cash used in acquisitions |  | 0 | (3,899) | 0
Securities available for sale: |  |  |  |
Proceeds from maturities, calls and principal paydowns |  | 395,386 | 336,410 | 273,578
Proceeds from sales |  | 0 | 0 | 26,203
Purchases |  | (775,963) | (689,932) | (252,963)
Securities held to maturity: |  |  |  |
Proceeds from maturities, calls and principal paydowns |  | 181,620 | 243,136 | 223,733
Proceeds from sales |  | 0 | 996 | 0
Purchases |  | (299,014) | (230,951) | (70,660)
Equity securities: |  |  |  |
Proceeds from calls |  | 1,000 | 2,000 | 0
Proceeds from sales |  | 0 | 0 | 3,966
Purchases |  | 0 | 0 | (93)
Other: |  |  |  |
Net increase in loans |  | (9,305) | (378,765) | (272,698)
Proceeds from Federal Home Loan Bank stock redemption |  | 2,422 | 63,305 | 182,752
Purchases of Federal Reserve Bank and Federal Home Loan Bank stock |  | (167) | (46,038) | (174,143)
Proceeds from settlement of bank owned life insurance |  | 4,413 | 1,057 | 1,086
Purchase of bank owned life insurance |  | (40,000) | 0 | 0
Purchases of premises and equipment, net |  | (7,740) | (8,157) | (6,647)
Proceeds from sales of other real estate owned |  | 1,290 | 1,113 | 1,543
Net cash provided by (used in) investing activities |  | (546,058) | (709,725) | (64,343)
Financing activities |  |  |  |
Net increase in deposits |  | 1,152,777 | 1,493,872 | 219,609
Net decrease in short-term borrowings |  | (70,592) | (486,889) | (216,421)
Proceeds from issuance of subordinated debt |  | 0 | 100,000 | 0
Payment of subordinated debt issuance costs |  | 0 | (2,178) | 0
Proceeds from issuance of long-term debt |  | 0 | 0 | 10,598
Repayments of long-term debt |  | (25,101) | (25,114) | (20,111)
Proceeds from the issuance of shares to employee and other stock plans |  | 112 | 184 | 725
Cash paid by employer for tax-withholding on stock issuance |  | (2,931) | (1,537) | (1,622)
Purchase of treasury stock |  | (21,714) | (7,980) | 0
Cash dividends |  | (47,738) | (47,207) | (46,010)
Net cash provided by (used in) financing activities |  | 984,813 | 1,023,151 | (53,232)
Net increase in cash and cash equivalents |  | 596,390 | 455,838 | 35,888
Cash and cash equivalents at beginning of year |  | 672,681 | 216,843 | 180,955
Cash and cash equivalents at end of year |  | 1,269,071 | 672,681 | 216,843
Cash paid during the period for: |  |  |  |
Interest expense |  | 20,285 | 31,692 | 55,908
Income taxes paid, net of refund |  | 46,097 | 45,790 | 28,374
Noncash investing activities: |  |  |  |
Loans transferred to other real estate owned |  | 181 | 1,017 | 787
Acquisitions: |  |  |  |
Fair value of assets acquired |  | $ 0 | $ 3,328 | $ 0
[1] | Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.

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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3521-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3044-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=123431023&loc=SL98516268-108586 + Details
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- Definition The amount of cash paid for the origination of mortgages that are held for sale. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3461-108585 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
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- Definition Amount of cash inflow from sale 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://fasb.org/us-gaap/role/ref/legacyRef -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 Amount of cash inflow from sale of Federal Home Loan Bank (FHLB) stock. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the sale of securities that had been designated as held-to-maturity. Excludes proceeds from maturities, prepayments and calls by the issuer. + 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://fasb.org/us-gaap/role/ref/legacyRef -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 inflow resulting from the sale of loans classified as held-for-sale, including proceeds from loans sold through mortgage securitization. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 16 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3337-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3461-108585 + Details
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- Definition The cash inflow associated with the sale of other real estate not otherwise defined in the taxonomy. + References Reference 1: 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 credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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- Definition Amount of cash outflow for the payment of debt classified as other, maturing after one year or the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + 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 (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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- References No definition available. + Details
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- Definition Value transferred from mortgage loans to real estate owned (REO) in noncash transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4313-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586 + Details
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