Loan and Lease Financings (Details 2) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Loan and Lease Financings
Recorded investment in loans and leases	$ 4,179,417	$ 3,994,692
Residential real estate and home equity and consumer loans
Loan and Lease Financings
Recorded investment in loans and leases	640,928	612,608
Residential real estate and home equity
Loan and Lease Financings
Recorded investment in loans and leases	490,186	464,129
Consumer
Loan and Lease Financings
Recorded investment in loans and leases	150,742	148,479
Performing | Residential real estate and home equity and consumer loans
Loan and Lease Financings
Recorded investment in loans and leases	637,855	610,416
Performing | Residential real estate and home equity
Loan and Lease Financings
Recorded investment in loans and leases	488,325	462,236
Performing | Consumer
Loan and Lease Financings
Recorded investment in loans and leases	$ 149,530	148,180
Nonperforming
Loan and Lease Financings
Classification of nonperforming loans, threshold period past due	90 days
Nonperforming | Residential real estate and home equity and consumer loans
Loan and Lease Financings
Recorded investment in loans and leases	$ 3,073	2,192
Nonperforming | Residential real estate and home equity
Loan and Lease Financings
Recorded investment in loans and leases	1,861	1,893
Nonperforming | Consumer
Loan and Lease Financings
Recorded investment in loans and leases	$ 1,212	$ 299