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Deposits - Schedule of Deposits (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 9,507,581 | $ 8,311,149
Total interest-bearing deposits | 13,009,025 | 12,377,637
Total deposits | 22,516,606 | 20,688,786
Total non-interest-bearing demand deposits, Percentage of Total | 42.20% | 40.20%
Total interest-bearing deposits, Percentage of Total | 57.80% | 59.80%
Total deposits, Percentage of Total | 100.00% | 100.00%
Commercial and Individual [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | 8,711,011 | 7,445,656
Total non-interest-bearing demand deposits, Percentage of Total | 38.70% | 36.00%
Correspondent Banks [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | 409,839 | 427,134
Total non-interest-bearing demand deposits, Percentage of Total | 1.80% | 2.10%
Private Accounts [Member] |  |
Deposit [Line Items] |  |
Savings and interest checking | 4,221,278 | 4,020,313
Money market accounts | 7,348,003 | 6,883,869
Time accounts of $100,000 or more | 568,487 | 508,441
Time accounts under $100,000 | 473,711 | 438,800
Total private accounts | 12,611,479 | 11,851,423
Savings and interest checking, Percentage of Total | 18.80% | 19.40%
Money market accounts, Percentage of Total | 32.60% | 33.30%
Time accounts of $100,000 or more, Percentage of Total | 2.50% | 2.50%
Time accounts under $100,000, Percentage of Total | 2.10% | 2.10%
Total private accounts, Percentage of Total | 56.00% | 57.30%
Public Funds [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | 386,731 | 438,359
Savings and interest checking | 250,579 | 305,976
Money market accounts | 55,749 | 56,015
Time accounts of $100,000 or more | 87,045 | 160,637
Time accounts under $100,000 | 4,173 | 3,586
Total public funds | $ 397,546 | $ 526,214
Total non-interest-bearing demand deposits, Percentage of Total | 1.70% | 2.10%
Savings and interest checking, Percentage of Total | 1.10% | 1.50%
Money market accounts, Percentage of Total | 0.30% | 0.20%
Time accounts under $100,000, Percentage of Total | 0.00% | 0.00%
Time accounts of $100,000 or more, Percentage of Total | 0.40% | 0.80%
Total public funds, Percentage of Total | 1.80% | 2.50%

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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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + Details
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- Definition The aggregate amount of domestic time deposits (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 or more. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6479006&loc=d3e64164-112818 + Details
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