Loans and Leases (Details 4) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual Loans/Leases	$ 173,030	$ 170,599
Performing Restructured Loans	56,501	64,952
Total Impaired Loans/Leases	229,531	235,551
Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual Loans/Leases	173,030	170,599
Total Impaired Loans/Leases	229,531	235,551
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual Loans/Leases	72,042	69,335
Performing Restructured Loans	47,119	54,750
Total Impaired Loans/Leases	119,161	124,085
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual Loans/Leases	362	364
Performing Restructured Loans	6,321	6,893
Total Impaired Loans/Leases	6,683	7,257
Commercial | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual Loans/Leases	100,453	100,561
Performing Restructured Loans	2,920	3,157
Total Impaired Loans/Leases	103,373	103,718
Consumer | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual Loans/Leases	173	339
Performing Restructured Loans	141	152
Total Impaired Loans/Leases	$ 314	$ 491