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Loans - TDR's by Class and the Associated Specific Reserves (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) loan	Jun. 30, 2014 USD ($) loan	Jun. 30, 2015 USD ($) loan	Jun. 30, 2014 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Modifications Number Of Contracts Greater Than 30 Days Past Due Place In T D R In Previous 12 Months | loan	9	12	9	12
Financing Receivable Recorded Investment Greater Than 30 Days Past Due Placed In T D R In Previous12 Months	$ 1,455	$ 2,052	$ 1,455	$ 2,052
Days Past Due Placed In T D R In Previous 12 Months	$ 87	$ 315	$ 87	$ 315
Financing Receivable Modifications Number Of Contracts During Period | loan	0	0	0	3
Financing Receivable Modifications Pre Modification Recorded Investment During Period				$ 349
Financing Receivable Modifications Post Modification Recorded Investment During Period				291
Troubled Debt Restructuring, Loans and Leases Receivable, Specific Allowance Current Period				$ 17
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Modifications Number Of Contracts Greater Than 30 Days Past Due Place In T D R In Previous 12 Months | loan	0	1	0	1
Financing Receivable Recorded Investment Greater Than 30 Days Past Due Placed In T D R In Previous12 Months	$ 0	$ 518	$ 0	$ 518
Days Past Due Placed In T D R In Previous 12 Months	$ 0	$ 259	$ 0	$ 259
Financing Receivable Modifications Number Of Contracts During Period | loan				0
Financing Receivable Modifications Pre Modification Recorded Investment During Period				$ 0
Financing Receivable Modifications Post Modification Recorded Investment During Period				0
Troubled Debt Restructuring, Loans and Leases Receivable, Specific Allowance Current Period				$ 0
Commercial construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Modifications Number Of Contracts Greater Than 30 Days Past Due Place In T D R In Previous 12 Months | loan	0	0	0	0
Financing Receivable Recorded Investment Greater Than 30 Days Past Due Placed In T D R In Previous12 Months		$ 0		$ 0
Financing Receivable Modifications Number Of Contracts During Period | loan				0
Financing Receivable Modifications Pre Modification Recorded Investment During Period				$ 0
Financing Receivable Modifications Post Modification Recorded Investment During Period				0
Troubled Debt Restructuring, Loans and Leases Receivable, Specific Allowance Current Period				$ 0
Commercial other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Modifications Number Of Contracts Greater Than 30 Days Past Due Place In T D R In Previous 12 Months | loan	0	0	0	0
Financing Receivable Recorded Investment Greater Than 30 Days Past Due Placed In T D R In Previous12 Months	$ 0	$ 0	$ 0	$ 0
Days Past Due Placed In T D R In Previous 12 Months	$ 0	$ 0	$ 0	$ 0
Financing Receivable Modifications Number Of Contracts During Period | loan				0
Financing Receivable Modifications Pre Modification Recorded Investment During Period				$ 0
Financing Receivable Modifications Post Modification Recorded Investment During Period				0
Troubled Debt Restructuring, Loans and Leases Receivable, Specific Allowance Current Period				$ 0
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Modifications Number Of Contracts Greater Than 30 Days Past Due Place In T D R In Previous 12 Months | loan	0	0	0	0
Financing Receivable Modifications Number Of Contracts During Period | loan				0
Financing Receivable Modifications Pre Modification Recorded Investment During Period				$ 0
Financing Receivable Modifications Post Modification Recorded Investment During Period				0
Troubled Debt Restructuring, Loans and Leases Receivable, Specific Allowance Current Period				$ 0
Residential term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Modifications Number Of Contracts Greater Than 30 Days Past Due Place In T D R In Previous 12 Months | loan	8	10	8	10
Financing Receivable Recorded Investment Greater Than 30 Days Past Due Placed In T D R In Previous12 Months	$ 1,271	$ 1,333	$ 1,271	$ 1,333
Days Past Due Placed In T D R In Previous 12 Months	$ 87	$ 35	$ 87	$ 35
Financing Receivable Modifications Number Of Contracts During Period | loan				3
Financing Receivable Modifications Pre Modification Recorded Investment During Period				$ 349
Financing Receivable Modifications Post Modification Recorded Investment During Period				291
Troubled Debt Restructuring, Loans and Leases Receivable, Specific Allowance Current Period				$ 17
Residential construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Modifications Number Of Contracts Greater Than 30 Days Past Due Place In T D R In Previous 12 Months | loan	0	0	0	0
Financing Receivable Modifications Number Of Contracts During Period | loan				0
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Modifications Number Of Contracts Greater Than 30 Days Past Due Place In T D R In Previous 12 Months | loan	1	1	1	1
Financing Receivable Recorded Investment Greater Than 30 Days Past Due Placed In T D R In Previous12 Months	$ 184	$ 201	$ 184	$ 201
Days Past Due Placed In T D R In Previous 12 Months	$ 0	$ 21	$ 0	$ 21
Financing Receivable Modifications Number Of Contracts During Period | loan				0
Financing Receivable Modifications Pre Modification Recorded Investment During Period				$ 0
Financing Receivable Modifications Post Modification Recorded Investment During Period				0
Troubled Debt Restructuring, Loans and Leases Receivable, Specific Allowance Current Period				$ 0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Modifications Number Of Contracts Greater Than 30 Days Past Due Place In T D R In Previous 12 Months | loan	0	0	0	0
Financing Receivable Modifications Number Of Contracts During Period | loan				0

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- Definition

Specific allowance for loan and lease losses on receivable financings greater 30 days past due that are classified as troubled debt restructurings during the period and that had been placed in TDR status in the previous 12 months.

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