Commitments, Contingencies, and Guarantees (Credit commitments) (Details 1) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 2,811,918
Commercial Letters of Credit
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	16,981
Unfunded Commitments to Extend Credit
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 2,713,937
Standby and Commercial Letters of Credit | Minimum [Member]
Other Commitments [Line Items]
Standby and Commercial Letters of Credit Remaining Term	1 month
Standby and Commercial Letters of Credit | Maximum [Member]
Other Commitments [Line Items]
Standby and Commercial Letters of Credit Remaining Term	14 months
Standby Letters of Credit
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 81,000
Assets Secured for Standby Letters of Credit	$ 49,100