Loans and Leases - Mortgages in Process of Foreclosure (Details) - Residential Real Estate [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Mortgage Loans in Process of Foreclosure, Amount	$ 0	$ 180
Real Estate-Home Equity Secured for Personal Purpose [Member]
Financing Receivable, Modifications [Line Items]
Mortgage Loans in Process of Foreclosure, Amount	$ 0	$ 180

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL49126937-111524

Name:	us-gaap_MortgageLoansInProcessOfForeclosureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant