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Loan and Lease Financings (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Loan and Lease Financings
Recorded investment in loans and leases	$ 4,691,097	$ 4,527,678
Residential real estate and home equity and consumer loans
Loan and Lease Financings
Recorded investment in loans and leases	651,772	654,268
Residential real estate and home equity
Loan and Lease Financings
Recorded investment in loans and leases	518,130	526,122
Consumer
Loan and Lease Financings
Recorded investment in loans and leases	133,642	128,146
Performing | Residential real estate and home equity and consumer loans
Loan and Lease Financings
Recorded investment in loans and leases	649,668	651,785
Performing | Residential real estate and home equity
Loan and Lease Financings
Recorded investment in loans and leases	516,208	523,803
Performing | Consumer
Loan and Lease Financings
Recorded investment in loans and leases	$ 133,460	127,982
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	$ 2,104	2,483
Nonperforming | Residential real estate and home equity
Loan and Lease Financings
Recorded investment in loans and leases	1,922	2,319
Nonperforming | Consumer
Loan and Lease Financings
Recorded investment in loans and leases	$ 182	$ 164

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Represents the threshold period past due used to classify loans as nonperforming.

+ References

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

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