Premises and Equipment Components of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 102,346	$ 97,561
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	70,519	66,525
Premises and equipment, net	31,827	31,036
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	46,031	43,433
Furniture Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	53,156	49,039
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,159	4,715
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 0	$ 374