Loans and the Allowance for Loan and Lease Losses (Details) - Aging analysis - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 13,274	$ 33,418
Current	3,435,349	3,068,376
Total Loans Receivable	3,448,623	3,101,794
Loans Receivable 90 Days or Greater Past Due and Still Accruing/Accreting	5,197
30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	975	8,889
60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,773	4,502
90 Days or Greater Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9,526	20,027
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,612	17,257
Current	638,818	552,859
Total Loans Receivable	644,430	570,116
Loans Receivable 90 Days or Greater Past Due and Still Accruing/Accreting	4,543
Commercial Portfolio Segment [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		6,887
Commercial Portfolio Segment [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	249	3,505
Commercial Portfolio Segment [Member] | 90 Days or Greater Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,363	6,865
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,446	12,547
Current	2,096,358	1,954,149
Total Loans Receivable	2,100,804	1,966,696
Loans Receivable 90 Days or Greater Past Due and Still Accruing/Accreting	654
Commercial Real Estate Portfolio Segment [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	461	1,998
Commercial Real Estate Portfolio Segment [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,600	988
Commercial Real Estate Portfolio Segment [Member] | 90 Days or Greater Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,385	9,561
Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,479
Current	471,109	327,359
Total Loans Receivable	471,109	328,838
Loans Receivable 90 Days or Greater Past Due and Still Accruing/Accreting
Construction Loans [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Construction Loans [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
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	3,207	2,122
Current	226,194	231,568
Total Loans Receivable	229,401	233,690
Loans Receivable 90 Days or Greater Past Due and Still Accruing/Accreting
Residential Portfolio Segment [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	505
Residential Portfolio Segment [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	924
Residential Portfolio Segment [Member] | 90 Days or Greater Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,778	2,122
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9	13
Current	2,870	2,441
Total Loans Receivable	2,879	2,454
Loans Receivable 90 Days or Greater Past Due and Still Accruing/Accreting
Consumer Portfolio Segment [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9	4
Consumer Portfolio Segment [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		9
Consumer Portfolio Segment [Member] | 90 Days or Greater Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due