Fair Value Measurements (Fair Value of Assets Measured on Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Impaired loans:
Impaired loans, Liquidation expense, Range		10.00%
Maximum [Member]
Impaired loans:
Impaired loans, Discount rate, Range	8.50%	8.50%
Other real estate owned, Appraisal adjustment, Range	30.00%	30.00%
Other real estate owned, Liquidation expense, Range	10.00%	10.00%
Minimum [Member]
Impaired loans:
Impaired loans, Appraisal adjustment, Range	10.00%	10.00%
Impaired loans, Liquidation expense, Range	10.00%
Impaired loans, Discount rate, Range	4.00%	4.00%
Other real estate owned, Appraisal adjustment, Range	20.00%	20.00%
Other real estate owned, Liquidation expense, Range	5.00%	5.00%
Appraisal Of Collateral [Member]
Impaired loans:
Impaired loans	$ 1,200	$ 510
Other real estate owned	1,569	1,794
Discounted Cash Flows [Member]
Impaired loans:
Impaired loans	$ 5,896	$ 6,005

Fair Value Disclosure, Range For Adjusting The Value Of Collateral, Appraisal Adjustments, Impaired Loans.

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- Definition

Fair Value Disclosure, Range For Adjusting The Value Of Collateral, Appraisal Adjustments, Other Real Estate Owned.

+ References

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- Definition

Fair Value Disclosure, Range For Adjusting The Value Of Collateral, Discount Rate, Impaired Loans.

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- Definition

Fair Value Disclosure, Range For Adjusting The Value Of Collateral, Liquidation Expense, Impaired Loans.

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Fair Value Disclosure, Range For Adjusting The Value Of Collateral, Liquidation Expense, Other Real Estate Owned.

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Fair value portion of other assets.

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Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(5))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: 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(7))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13728-122682

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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