Commitments, Guarantees, and Contingent Liabilities (Details) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Commitments to extend credit:
Commercial, industrial, and agricultural		$ 1,393,434	$ 1,303,056
Commercial real estate		361,156	366,250
Home equity		381,022	352,114
Other commitments	[1]	213,437	203,121
Total commitments to extend credit		2,349,049	2,224,541
Letters of credit		104,933	100,610
Recourse on assets sold:
Unpaid principal balance of loans sold		190,294	196,389
Carrying value of recourse obligation	[2]	$ 179	$ 87

[1] Other commitments includes installment and overdraft protection program commitments.

[2] Included in other liabilities in the Consolidated Statements of Financial Condition