Loans and Leases (Details 4) - USD ($) $ in Thousands		Jun. 30, 2018	Dec. 31, 2017
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		$ 113,745	$ 155,784	[1]
Performing Restructured Loans		58,148	56,838	[1]
Total Impaired Loans and Leases		171,893	212,622	[1]
Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	[2]		155,784
Total Impaired Loans and Leases	[3]		212,622
Real Estate Mortgage
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		36,632
Performing Restructured Loans		50,500
Total Impaired Loans and Leases		87,132
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	[1],[2]		68,913
Performing Restructured Loans	[1]		47,560
Total Impaired Loans and Leases	[1],[3]		116,473
Real Estate Construction and Land
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		10,450
Performing Restructured Loans		5,549
Total Impaired Loans and Leases		15,999
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 and leases	[1],[2]		0
Performing Restructured Loans	[1]		5,690
Total Impaired Loans and Leases	[1],[3]		5,690
Commercial
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		66,399
Performing Restructured Loans		1,982
Total Impaired Loans and Leases		68,381
Commercial | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	[1],[2]		86,851
Performing Restructured Loans	[1]		3,488
Total Impaired Loans and Leases	[1],[3]		90,339
Consumer
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		264
Performing Restructured Loans		117
Total Impaired Loans and Leases		$ 381
Consumer | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	[1],[2]		20
Performing Restructured Loans	[1]		100
Total Impaired Loans and Leases	[1],[3]		$ 120

[1] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[2] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[3] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.