Loan and Lease Financings (Details 2) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Loan and Lease Financings
Recorded investment in loans and leases	$ 5,099,546	$ 4,835,464
Residential real estate and home equity and consumer loans
Loan and Lease Financings
Recorded investment in loans and leases	671,098	660,492
Residential real estate and home equity
Loan and Lease Financings
Recorded investment in loans and leases	531,630	523,855
Consumer
Loan and Lease Financings
Recorded investment in loans and leases	139,468	136,637
Performing | Residential real estate and home equity and consumer loans
Loan and Lease Financings
Recorded investment in loans and leases	668,573	658,269
Performing | Residential real estate and home equity
Loan and Lease Financings
Recorded investment in loans and leases	529,405	521,846
Performing | Consumer
Loan and Lease Financings
Recorded investment in loans and leases	$ 139,168	136,423
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	$ 2,525	2,223
Nonperforming | Residential real estate and home equity
Loan and Lease Financings
Recorded investment in loans and leases	2,225	2,009
Nonperforming | Consumer
Loan and Lease Financings
Recorded investment in loans and leases	$ 300	$ 214