Loans and Leases (Details Textual) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) Contract	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases		$ 113,745		$ 113,745		$ 155,784	[1]
Receivable, 90 or more days past due		16,922		16,922		14,200
Receivable, 30-89 days past due		15,266		15,266		3,200
Financing receivable, nonaccrual status, current						138,400
Credit Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases		81,500		$ 81,500
Percentage of nonaccrual loans and leases				71.60%
Non Purchased Credit Impaired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	[2]					155,784
Receivable, 90 or more days past due	[3]					14,165
Receivable, 30-89 days past due	[3]					48,435
Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable, 90 or more days past due		16,900		$ 16,900
Receivable, 30-89 days past due		3,400		3,400
Financing receivable, nonaccrual status, current		93,400		93,400
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases		66,399		66,399
Receivable, 90 or more days past due		6,072		6,072
Receivable, 30-89 days past due		2,363		2,363
Commercial | Non Purchased Credit Impaired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	[1],[2]					86,851
Receivable, 90 or more days past due						3,036
Receivable, 30-89 days past due						$ 9,723
Commercial | Commercial | Cash Flow [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		$ 0	$ 0	$ 2,100	$ 0
Number of Loans | Contract				1

[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.