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Deposits - Schedule of Deposits (Detail) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
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Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 10,909,415 | $ 10,513,369
Total interest-bearing deposits | 15,232,749 | 15,298,206
Total deposits | $ 26,142,164 | $ 25,811,575
Total non-interest-bearing demand deposits, Percentage of Total | 41.70% | 40.80%
Total interest-bearing deposits, Percentage of Total | 58.30% | 59.20%
Total deposits, Percentage of Total | 100.00% | 100.00%
Commercial and Individual [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 10,220,181 | $ 9,670,989
Total non-interest-bearing demand deposits, Percentage of Total | 39.10% | 37.50%
Correspondent Banks [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 264,543 | $ 280,751
Total non-interest-bearing demand deposits, Percentage of Total | 1.00% | 1.10%
Private Accounts [Member] |  |
Deposit [Line Items] |  |
Savings and interest checking | $ 6,545,178 | $ 6,436,065
Money market accounts | 7,489,565 | 7,486,431
Time accounts of $100,000 or More | 446,809 | 460,028
Time accounts under $100,000 | 332,543 | 338,714
Total private accounts | $ 14,814,095 | $ 14,721,238
Savings and interest checking, Percentage of Total | 25.00% | 24.90%
Money market accounts, Percentage of Total | 28.70% | 29.00%
Time accounts of $100,000 or more, Percentage of Total | 1.70% | 1.80%
Time accounts under $100,000, Percentage of Total | 1.30% | 1.30%
Total private accounts, Percentage of Total | 56.70% | 57.00%
Public Funds [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 424,691 | $ 561,629
Savings and interest checking | 302,202 | 446,872
Money market accounts | 99,658 | 113,669
Time accounts of $100,000 or More | 15,762 | 15,748
Time accounts under $100,000 | 1,032 | 679
Total public funds | $ 418,654 | $ 576,968
Total non-interest-bearing demand deposits, Percentage of Total | 1.60% | 2.20%
Savings and interest checking, Percentage of Total | 1.10% | 1.70%
Money market accounts, Percentage of Total | 0.40% | 0.40%
Time accounts of $100,000 or more, Percentage of Total | 0.10% | 0.10%
Time accounts under $100,000, Percentage of Total | 0.00% | 0.00%
Total public funds, Percentage of Total | 1.60% | 2.20%

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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://www.xbrl.org/2003/role/presentationRef -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=6876686&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://www.xbrl.org/2003/role/presentationRef -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=6876686&loc=d3e534808-122878 + Details
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- Definition Amount of interest bearing deposits with no stated maturity, which may include passbook and statement savings accounts and money-market deposit accounts (MMDAs). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6876686&loc=d3e534808-122878 + Details
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- Definition The aggregate of all domestic and foreign interest-bearing deposit liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6876686&loc=d3e534808-122878 + Details
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- Definition The aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6876686&loc=d3e534808-122878 + Details
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