Loans and Leases (Details 4) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 170,599	$ 129,019
Impaired Financing Receivable Performing Restructured Loans	64,952	40,182
Impaired Financing Receivable, Recorded Investment	235,551	169,201
Non Purchased Credit Impaired Loans and Leases [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	170,599	129,019
Impaired Financing Receivable, Recorded Investment	235,551	169,201
Non Purchased Credit Impaired Loans and Leases [Member] | Mortgages [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	69,335	57,277
Impaired Financing Receivable Performing Restructured Loans	54,750	27,133
Impaired Financing Receivable, Recorded Investment	124,085	84,410
Non Purchased Credit Impaired Loans and Leases [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	364	372
Impaired Financing Receivable Performing Restructured Loans	6,893	7,631
Impaired Financing Receivable, Recorded Investment	7,257	8,003
Non Purchased Credit Impaired Loans and Leases [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	100,561	69,839
Impaired Financing Receivable Performing Restructured Loans	3,157	5,221
Impaired Financing Receivable, Recorded Investment	103,718	75,060
Non Purchased Credit Impaired Loans and Leases [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	339	1,531
Impaired Financing Receivable Performing Restructured Loans	152	197
Impaired Financing Receivable, Recorded Investment	$ 491	$ 1,728