Loans and Leases (Details 10) - Purchased Credit Impaired Loans and Leases [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	$ 108,424	$ 189,045
Classified [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	31,660	62,474
Nonclassified [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	76,764	126,571
Mortgages [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	92,775	168,679
Mortgages [Member] | Classified [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	19,445	43,554
Mortgages [Member] | Nonclassified [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	73,330	125,125
Real Estate Construction [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	2,408	2,653
Real Estate Construction [Member] | Classified [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	1,023	1,230
Real Estate Construction [Member] | Nonclassified [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	1,385	1,423
Commercial Portfolio Segment [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	12,992	17,414
Commercial Portfolio Segment [Member] | Classified [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	10,943	17,391
Commercial Portfolio Segment [Member] | Nonclassified [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	2,049	23
Consumer Portfolio Segment [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	249	299
Consumer Portfolio Segment [Member] | Classified [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	249	299
Consumer Portfolio Segment [Member] | Nonclassified [Member]
Financing Receivable Recorded Investment By Credit Risk [Line Items]
Loans And Leases Net Of Discounts Covered	$ 0	$ 0