Loans and Leases (Loan Portfolio Segment Balances) (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 3,495,370	$ 3,127,392
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	465,765	390,781
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	0	54
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	450,875	425,552
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	678,027	611,061
Commercial Real Estate Portfolio Segment [Member] | Commercial Investor Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	719,084	640,193
Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition, Development and Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	255,980	205,124
Residential Real Estate Portfolio Segment [Member] | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	796,358	717,886
Residential Real Estate Portfolio Segment [Member] | Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 129,281	$ 136,741