Commitments, Contingencies, and Guarantees (Credit Commitments) (Details 1) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Credit Commitments [Line Items]
Credit Commitments	$ 2,937,536	$ 2,861,833
Unfunded Commitments to Extend Credit
Credit Commitments [Line Items]
Credit Commitments	2,800,247	2,732,734
Standby Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	120,070	112,830
Commercial Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	$ 17,219	$ 16,269