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Fair Value Information - Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets |  |
Total cash and cash equivalents | $ 1,653,039 | $ 1,732,548
Investment securities available-for-sale | 3,647,330 | 3,183,923
Investment securities held-to-maturity | 2,362,741 | 1,925,970
Total loans, net of allowance for loan losses | 8,515,565 | 7,822,694
Deposits: |  |
Interest-bearing | 5,380,474 | 4,872,386
Financial liabilities, Net Amounts Presented in the Condensed Consolidated Balance Sheets | 602,562 | 656,551
Carrying Value [Member] |  |
Assets |  |
Total cash and cash equivalents | 1,653,039 | 1,732,548
Interest-earning balances due from depository institutions | 6,859 | 25,999
Investment securities available-for-sale | 3,647,330 | 3,183,923
Investment securities held-to-maturity | 2,362,741 | 1,925,970
Total loans, net of allowance for loan losses | 8,515,565 | 7,822,694
Financial assets, Net Amounts Presented in the Condensed Consolidated Balance Sheets | 3,653 | 14,163
Deposits: |  |
Interest-bearing | 5,380,474 | 4,872,386
Borrowings | 598,909 | 644,669
Junior subordinated debentures | 0 |
Financial liabilities, Net Amounts Presented in the Condensed Consolidated Balance Sheets | 3,653 | 14,163
Estimated Fair Value [Member] |  |
Assets |  |
Total cash and cash equivalents | 1,653,039 | 1,732,548
Interest-earning balances due from depository institutions | 6,859 | 25,999
Investment securities available-for-sale | 3,647,330 | 3,183,923
Investment securities held-to-maturity | 2,203,144 | 1,921,693
Total loans, net of allowance for loan losses | 8,513,262 | 7,696,210
Financial assets, Net Amounts Presented in the Condensed Consolidated Balance Sheets | 3,653 | 14,163
Deposits: |  |
Interest-bearing | 5,380,814 | 4,871,531
Borrowings | 604,700 | 586,645
Junior subordinated debentures | 0 | 0
Financial liabilities, Net Amounts Presented in the Condensed Consolidated Balance Sheets | 3,653 | 14,163
Estimated Fair Value [Member] | Level 1 [Member] |  |
Assets |  |
Total cash and cash equivalents | 1,653,039 | 1,732,548
Interest-earning balances due from depository institutions | 0 | 0
Investment securities available-for-sale | 0 | 0
Investment securities held-to-maturity | 0 | 0
Total loans, net of allowance for loan losses | 0 | 0
Financial assets, Net Amounts Presented in the Condensed Consolidated Balance Sheets | 0 | 0
Deposits: |  |
Interest-bearing | 0 | 0
Borrowings | 0 | 0
Junior subordinated debentures | 0 | 0
Financial liabilities, Net Amounts Presented in the Condensed Consolidated Balance Sheets | 0 | 0
Estimated Fair Value [Member] | Level 2 [Member] |  |
Assets |  |
Total cash and cash equivalents | 0 | 0
Interest-earning balances due from depository institutions | 6,859 | 25,999
Investment securities available-for-sale | 3,647,330 | 3,183,923
Investment securities held-to-maturity | 2,203,144 | 1,921,693
Total loans, net of allowance for loan losses | 0 | 0
Financial assets, Net Amounts Presented in the Condensed Consolidated Balance Sheets | 3,653 | 14,163
Deposits: |  |
Interest-bearing | 5,380,814 | 4,871,531
Borrowings | 604,700 | 586,645
Junior subordinated debentures | 0 | 0
Financial liabilities, Net Amounts Presented in the Condensed Consolidated Balance Sheets | 3,653 | 14,163
Estimated Fair Value [Member] | Level 3 [Member] |  |
Assets |  |
Total cash and cash equivalents | 0 | 0
Interest-earning balances due from depository institutions | 0 | 0
Investment securities available-for-sale | 0 | 0
Investment securities held-to-maturity | 0 | 0
Total loans, net of allowance for loan losses | 8,513,262 | 7,696,210
Financial assets, Net Amounts Presented in the Condensed Consolidated Balance Sheets | 0 | 0
Deposits: |  |
Interest-bearing | 0 | 0
Borrowings | 0 | 0
Junior subordinated debentures | 0 | 0
Financial liabilities, Net Amounts Presented in the Condensed Consolidated Balance Sheets | $ 0 | $ 0

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- Definition Amount 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes 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. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: 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 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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