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Note D - Loans and Allowance for Loan Losses - TDRs Pre-modification and Post-modification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Performing Financial Instruments [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment	$ 574	$ 1,746
TDR’s Performing to Modified Terms Post- Modification Recorded Investment	574	1,746
Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Interest Only Payments [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment		495
TDR’s Performing to Modified Terms Post- Modification Recorded Investment		495
Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment	574
TDR’s Performing to Modified Terms Post- Modification Recorded Investment	574
Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Extended Maturity [Member] | Commercial Real Estate Owner Occupied [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment		1,025
TDR’s Performing to Modified Terms Post- Modification Recorded Investment		1,025
Performing Financial Instruments [Member] | Commercial and Industrial Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment		226
TDR’s Performing to Modified Terms Post- Modification Recorded Investment		226
Nonperforming Financial Instruments [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment	226
TDR’s Performing to Modified Terms Post- Modification Recorded Investment	226
Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Interest Only Payments [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment	226
TDR’s Performing to Modified Terms Post- Modification Recorded Investment	226
Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment
TDR’s Performing to Modified Terms Post- Modification Recorded Investment
Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Extended Maturity [Member] | Commercial Real Estate Owner Occupied [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment
TDR’s Performing to Modified Terms Post- Modification Recorded Investment

X

- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524

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X

- Definition

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524

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