Loans and Leases (Details 4) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 129,019	$ 83,621
Non Purchased Credit Impaired Loans and Leases [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	129,019	83,621
Impaired Financing Receivable Performing Restructured Loans	40,182	35,244
Impaired Financing Receivable, Recorded Investment	169,201	118,865
Non Purchased Credit Impaired Loans and Leases [Member] | Mortgages [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	57,277	37,612
Impaired Financing Receivable Performing Restructured Loans	27,133	20,245
Impaired Financing Receivable, Recorded Investment	84,410	57,857
Non Purchased Credit Impaired Loans and Leases [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	372	1,559
Impaired Financing Receivable Performing Restructured Loans	7,631	8,996
Impaired Financing Receivable, Recorded Investment	8,003	10,555
Non Purchased Credit Impaired Loans and Leases [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	69,839	40,965
Impaired Financing Receivable Performing Restructured Loans	5,221	5,744
Impaired Financing Receivable, Recorded Investment	75,060	46,709
Non Purchased Credit Impaired Loans and Leases [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,531	3,485
Impaired Financing Receivable Performing Restructured Loans	197	259
Impaired Financing Receivable, Recorded Investment	$ 1,728	$ 3,744