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Mortgage Servicing Rights, Net (Tables)

12 Months Ended

Dec. 31, 2017

Mortgage Servicing [Abstract]

Schedule Of Servicing Assets At Fair Value [Table Text Block]

					Year ended December 31
(Dollars in thousands)					2017			2016
Beginning balance				$	1,952			2,316
Additions, net					224			324
Amortization expense					(533)			(687)
Change in valuation allowance					1			(1)
Ending balance				$	1,644			1,952
Valuation allowance included in MSRs, net:
Beginning of period				$	1			—
End of period					—			1
Fair value of amortized MSRs:
Beginning of period				$	2,678			3,086
End of period					2,528			2,678

Data And Assumptions Used In Fair Value Calculation Of MSRs [Table Text Block]

				December 31
(Dollars in thousands)				2017			2016
Unpaid principal balance			$	312,318			338,434
Weighted average prepayment speed (CPR)				10.2	%		10.9
Discount rate (annual percentage)				10.0	%		10.0
Weighted average coupon interest rate				3.8	%		3.8
Weighted average remaining maturity (months)				253			257
Weighted average servicing fee (basis points)				25.0			25.0

Estimated Amortization Expense Of MSRs For Five Years [Table Text Block]

(Dollars in thousands)	December 31, 2017
2018			$	262
2019				221
2020				188
2021				157
2022				134

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- Definition

Tabular disclosure of the activity in the balance of servicing assets (including a description of where changes in fair value are reported in the statement of income for each period for which results of operations are presented), including but not limited to, the following: beginning and ending balances, additions (for instance, through purchases of servicing assets), disposals, changes in fair value during the period resulting from changes in inputs or assumptions used in the valuation model, other changes in fair value along with a description of those changes, and other changes that affect the balance along with a description of those changes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

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Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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