Loans and the Allowance for Loan and Lease Losses (Details) - Aging analysis - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 33,418	$ 23,520
Current	3,068,376	2,516,011
Loans	3,101,794	2,539,531
Loans Receivable > 90 Days Past Due and Accruing		1,211
30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,889	12,848
60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,502	849
90 Days or Greater Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	20,027	9,823
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	17,257	6,722
Current	552,859	493,094
Loans	570,116	499,816
Loans Receivable > 90 Days Past Due and Accruing		45
Commercial Portfolio Segment [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,887	6,060
Commercial Portfolio Segment [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,505
Commercial Portfolio Segment [Member] | 90 Days or Greater Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,865	662
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	12,547	11,536
Current	1,954,149	1,622,974
Loans	1,966,696	1,634,510
Loans Receivable > 90 Days Past Due and Accruing		609
Commercial Real Estate Portfolio Segment [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,998	4,937
Commercial Real Estate Portfolio Segment [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	988	638
Commercial Real Estate Portfolio Segment [Member] | 90 Days or Greater Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9,561	5,961
Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,479
Current	327,359	167,359
Loans	328,838	167,359
Construction Loans [Member] | 90 Days or Greater Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,479
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,122	5,231
Current	231,568	229,736
Loans	233,690	234,967
Loans Receivable > 90 Days Past Due and Accruing		557
Residential Portfolio Segment [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,821
Residential Portfolio Segment [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		210
Residential Portfolio Segment [Member] | 90 Days or Greater Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,122	3,200
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	13	31
Current	2,441	2,848
Loans	2,454	2,879
Consumer Portfolio Segment [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4	30
Consumer Portfolio Segment [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 9	$ 1