Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingent Liabilities (Details)

v2.4.1.9
Commitments and Contingent Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Commercial [Member]    
Contract amounts of various commitments to extend credit    
Contract amount represents credit risk $ 10,978,254us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
$ 11,181,522us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Consumer [Member]    
Contract amounts of various commitments to extend credit    
Contract amount represents credit risk 7,809,875us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
7,579,632us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Commercial Real Estate [Member]    
Contract amounts of various commitments to extend credit    
Contract amount represents credit risk 953,874us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
908,112us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Standby Letters of Credit [Member]    
Contract amounts of various commitments to extend credit    
Contract amount represents credit risk $ 474,224us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_StandbyLettersOfCreditMember
$ 497,457us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_StandbyLettersOfCreditMember