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Condensed Parent Company Financial Statements - Summary of Cash Flow of Parent Company (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |
Net income | $ 212,465 | $ 193,100 | $ 167,630
Adjustments to reconcile to net cash provided by operating activities: |  |  |
Amortization of stock-based compensation arrangements of subsidiaries | 2,999 | 1,941 | 2,133
Other, net | (7,194) | (2,482) | 6,783
Net cash provided by operating activities | 233,045 | 226,272 | 203,934
INVESTING ACTIVITIES |  |  |
Other, net | 33,477 | 14,494 | 9,305
Net cash (used in) provided by investing activities | (669,705) | (1,519,168) | 422,885
FINANCING ACTIVITIES |  |  |
Common stock acquired | (1,820) |  | (11,663)
Net cash settlement of options |  |  | (5,479)
Cash dividends paid | (53,642) | (48,462) | (45,140)
Proceeds from issuance of subordinated notes, net of debt issuance costs |  |  | 59,150
Net cash (used in) provided by financing activities | (334,787) | 2,411,784 | (193,709)
Net (decrease)/increase in cash, due from banks and interest-bearing deposits | (771,447) | 1,118,888 | 433,110
Cash, due from banks and interest-bearing deposits at the beginning of the period | 3,168,910 | 2,050,022 | 1,616,912
Cash, due from banks and interest-bearing deposits at the end of the period | 2,397,463 | 3,168,910 | 2,050,022
SUPPLEMENTAL DISCLOSURE |  |  |
Cash paid during the period for interest | 191,760 | 42,930 | 11,993
Parent Company [Member] |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |
Net income | 212,465 | 193,100 | 167,630
Adjustments to reconcile to net cash provided by operating activities: |  |  |
Equity in undistributed earnings of subsidiaries | (81,275) | (105,817) | (116,365)
Amortization of stock-based compensation arrangements of subsidiaries | 2,910 | 1,833 | 2,048
Other, net | (655) | 3,815 | 5,056
Net cash provided by operating activities | 133,445 | 92,931 | 58,369
INVESTING ACTIVITIES |  |  |
Payments for investments in subsidiaries | (6,100) | (94,967) | (9,000)
Other, net | (778) | (1,352) | 4,429
Net cash (used in) provided by investing activities | (6,878) | (96,319) | (4,571)
FINANCING ACTIVITIES |  |  |
Issuance of common stock | 2,543 | 7,649 | 2,260
Common stock acquired | (1,820) |  | (11,663)
Net cash settlement of options |  |  | (5,479)
Cash dividends paid | (53,642) | (48,462) | (45,140)
Proceeds from issuance of subordinated notes, net of debt issuance costs |  |  | 59,150
Net cash (used in) provided by financing activities | (52,919) | (40,813) | (872)
Net (decrease)/increase in cash, due from banks and interest-bearing deposits | 73,648 | (44,201) | 52,926
Cash, due from banks and interest-bearing deposits at the beginning of the period | 17,806 | 62,007 | 9,081
Cash, due from banks and interest-bearing deposits at the end of the period | 91,454 | 17,806 | 62,007
SUPPLEMENTAL DISCLOSURE |  |  |
Cash paid during the period for interest | 4,122 | 4,122 | 3,130
Cash received during the period for income taxes, net | $ 1,746 | $ 6,667 | $ 4,411

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- Definition The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-13 + Details
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- Definition The amount of cash received during the period as refunds for the overpayment of taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-25 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-2 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 14 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-14 + Details
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- Definition The cash inflow from a borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in liquidation of the entity's assets or underlying collateral. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-14 + 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 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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