Business Combinations Acquired Loans Table (Details) (USD $) In Thousands, unless otherwise specified	Apr. 12, 2013
Acquired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	$ 4,624,293
Acquired Impaired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	824,608
Acquired performing loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	3,799,685
C&I | Acquired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	1,760,100
C&I | Acquired Impaired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	95,188
C&I | Acquired performing loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	1,664,912
CRE | Acquired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	739,105
CRE | Acquired Impaired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	380,039
CRE | Acquired performing loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	359,066
Construction | Acquired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	30,534
Construction | Acquired Impaired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	13,399
Construction | Acquired performing loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	17,135
Residential mortgages | Acquired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	512,743
Residential mortgages | Acquired Impaired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	233,007
Residential mortgages | Acquired performing loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	279,736
Installment | Acquired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	1,219,612
Installment | Acquired Impaired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	54,377
Installment | Acquired performing loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	1,165,235
Home equity lines | Acquired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	362,199
Home equity lines | Acquired Impaired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	48,598
Home equity lines | Acquired performing loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	313,601
Total consumer | Acquired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	2,094,554
Total consumer | Acquired Impaired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	335,982
Total consumer | Acquired performing loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	1,758,572
Total commercial | Acquired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	2,529,739
Total commercial | Acquired Impaired Loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	488,626
Total commercial | Acquired performing loans
Loans Acquired in Acquisition by Class [Line Items]
Loans	$ 2,041,113