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Loans and Allowance for Loan Losses (Composition of Loan Portfolio, Excluding Residential Loans Held for Sale) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 3,026,222	$ 2,782,439	$ 2,594,564
Residential real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	992,866	858,369
Loans	992,866	858,369	802,494
Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,269,533	1,164,023
Loans	1,269,533	1,164,023	1,050,780
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	381,780	373,400
Loans	381,780	373,400	333,639
Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	327,763	323,378
Loans	327,763	323,378	329,907
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	20,624	18,149
Loans	20,624	18,149	17,332
HPFC Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	33,656	45,120
Loans	$ 33,656	$ 45,120	$ 60,412

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No definition available.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. 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

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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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