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Deposits - Schedule of Deposits (Detail) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 14,845,770 | $ 10,873,629
Interest-bearing Deposit Liabilities, Total | 18,653,733 | 16,765,935
Total deposits | $ 33,499,503 | $ 27,639,564
Total non-interest-bearing demand deposits, Percentage of Total | 44.30% | 39.30%
Percentage of Interest-bearing Domestic Deposits to Deposits | 55.70% | 60.70%
Total deposits, Percentage of Total | 100.00% | 100.00%
Commercial and Individual [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 13,852,404 | $ 10,212,265
Total non-interest-bearing demand deposits, Percentage of Total | 41.40% | 36.90%
Correspondent Banks [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 208,836 | $ 246,181
Total non-interest-bearing demand deposits, Percentage of Total | 0.60% | 0.90%
Private Accounts [Member] |  |
Deposit [Line Items] |  |
Savings and interest checking | $ 8,176,608 | $ 7,147,327
Money market accounts | 8,684,470 | 7,888,433
Time accounts of $100,000 or More | 791,004 | 736,481
Time accounts under $100,000 | 339,174 | 347,418
Interest-bearing Deposit Liabilities, Total | $ 17,991,256 | $ 16,119,659
Savings and interest checking, Percentage of Total | 24.40% | 25.90%
Money market accounts, Percentage of Total | 25.90% | 28.50%
Time accounts of $100,000 or more, Percentage of Total | 2.40% | 2.70%
Time accounts under $100,000, Percentage of Total | 1.00% | 1.20%
Percentage of Interest-bearing Domestic Deposits to Deposits | 53.70% | 58.30%
Public Funds [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 784,530 | $ 415,183
Savings and interest checking | 583,214 | 548,399
Money market accounts | 76,088 | 73,180
Time accounts of $100,000 or More | 3,092 | 24,672
Time accounts under $100,000 | 83 | 25
Interest-bearing Deposit Liabilities, Total | $ 662,477 | $ 646,276
Total non-interest-bearing demand deposits, Percentage of Total | 2.30% | 1.50%
Savings and interest checking, Percentage of Total | 1.80% | 2.00%
Money market accounts, Percentage of Total | 0.20% | 0.30%
Time accounts of $100,000 or more, Percentage of Total | 0.00% | 0.10%
Time accounts under $100,000, Percentage of Total | 0.00% | 0.00%
Percentage of Interest-bearing Domestic Deposits to Deposits | 2.00% | 2.40%

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- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Amount of deposits in accounts that offer many of the same services as checking accounts although transactions may be somewhat more limited, share some of the characteristics of a money market fund and are insured by the Federal government, also known as money market accounts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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