Borrowed Funds (Wholesale Borrowings Schedule of Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
One year or less	$ 310,787
One to three years	230,269
Three to five years	0
Over five years	544,765
Total	1,085,821	$ 933,263
FHLB advances
Debt Instrument [Line Items]
One year or less	310,716
One to three years	230,193
Three to five years	0
Over five years	39,592
Total	580,501	427,857
Subordinate debentures
Debt Instrument [Line Items]
One year or less	0
One to three years	0
Three to five years	0
Over five years	505,173
Total	505,173	505,192
Wholesale Borrowings
Debt Instrument [Line Items]
One year or less	71
One to three years	76
Three to five years	0
Over five years	0
Total	$ 147	$ 214