Commitments, Contingencies, and Guarantees (Credit Commitments) (Details 1) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Credit Commitments [Line Items]
Credit Commitments	$ 2,828,560	$ 2,717,840
Unfunded Commitments to Extend Credit
Credit Commitments [Line Items]
Credit Commitments	2,751,256	2,646,085
Standby Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	63,871	62,344
Commercial Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	$ 13,433	$ 9,411