Commitments, Contingencies, and Guarantees (Credit Commitments) (Details 1) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Credit Commitments [Line Items] | ||
| Credit Commitments | $ 2,734,841 | $ 2,668,449 |
| Unfunded Commitments to Extend Credit | ||
| Credit Commitments [Line Items] | ||
| Credit Commitments | 2,622,115 | 2,604,429 |
| Standby Letters of Credit | ||
| Credit Commitments [Line Items] | ||
| Credit Commitments | 98,072 | 48,153 |
| Commercial Letters of Credit | ||
| Credit Commitments [Line Items] | ||
| Credit Commitments | $ 14,654 | $ 15,867 |