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Borrowings and Borrowings Availability (Schedule of debt) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Borrowings	$ 271,394,000	$ 186,394,000
Federal Home Loan Bank Term Note One [Member]
Maturity date	Jan. 27, 2017	Jan. 19, 2016
Borrowings	$ 20,000,000
Effective percentage	0.61%
Federal Home Loan Bank Term Note Two [Member]
Maturity date	Jan. 30, 2017	Jan. 29, 2016
Borrowings	$ 80,000,000
Effective percentage	0.63%
Federal Home Loan Bank Term Note Three [Member]
Maturity date	Apr. 18, 2017	Dec. 27, 2016
Borrowings	$ 50,000,000
Effective percentage	0.70%
Federal Home Loan Bank Term Note Four [Member]
Maturity date	Dec. 26, 2017	Dec. 26, 2017
Borrowings	$ 20,000,000	$ 20,000,000
Effective percentage	1.19%	1.19%
Federal Home Loan Bank Term Note Five [Member]
Maturity date	Dec. 29, 2017
Borrowings	$ 35,000,000
Effective percentage	0.80%
Federal Home Loan Bank Term Note Six [Member]
Maturity date	Dec. 24, 2018	Dec. 24, 2018
Borrowings	$ 20,000,000	$ 20,000,000
Effective percentage	1.57%	1.57%
Trust Preferred Securities 1 [Member]
Maturity date	Jan. 23, 2034	Jan. 23, 2034
Borrowings	$ 20,620,000	$ 20,620,000
Effective percentage	3.59%	3.02%
Variable rate description	3.59% at 12/31/16 adjustable rate 3 month LIBOR + 2.70%	3.02% at 12/31/15 adjustable rate 3 month LIBOR + 2.70%
Trust Preferred Securities 2 [Member]
Maturity date	Jun. 15, 2036	Jun. 15, 2036
Borrowings	$ 25,774,000	$ 25,774,000
Effective percentage	2.35%	1.90%
Variable rate description	2.35% at 12/31/16 adjustable rate 3 month LIBOR + 1.39%	1.90% at 12/31/15 adjustable rate 3 month LIBOR + 1.39%
Total Borrowings [Member]
Weighted average interest rate	1.16%	1.14%

X

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Weighted average interest rate of debt outstanding.

+ References

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- Definition

The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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