Securities (Summary of Volume of State and Political Subdivision Securities Held in Portfolio) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Total Amortized Cost	$ 276,443	$ 276,631
Available for sale securities, Unrealized Gains	5,576	7,170
Available for sale securities, Unrealized Losses	1,227	967
Available for sale securities, Estimated Fair Value	280,792	$ 282,834
ILLINOIS
Schedule of Available-for-sale Securities [Line Items]
Total Amortized Cost	9,899
Available for sale securities, Unrealized Gains	302
Available for sale securities, Unrealized Losses	2
Available for sale securities, Estimated Fair Value	10,199
TEXAS
Schedule of Available-for-sale Securities [Line Items]
Total Amortized Cost	9,636
Available for sale securities, Unrealized Gains	334
Available for sale securities, Unrealized Losses	0
Available for sale securities, Estimated Fair Value	9,970
West Virginia [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Amortized Cost	7,736
Available for sale securities, Unrealized Gains	117
Available for sale securities, Unrealized Losses	0
Available for sale securities, Estimated Fair Value	7,853
Ohio [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Amortized Cost	7,246
Available for sale securities, Unrealized Gains	114
Available for sale securities, Unrealized Losses	0
Available for sale securities, Estimated Fair Value	7,360
CALIFORNIA
Schedule of Available-for-sale Securities [Line Items]
Total Amortized Cost	6,139
Available for sale securities, Unrealized Gains	202
Available for sale securities, Unrealized Losses	15
Available for sale securities, Estimated Fair Value	$ 6,326

Available For Sale Securities Fair Value Disclosure 1.

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

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+ 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 210.5-02.2)
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