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Investment Securities Amortized Cost and Estimated Fair Value of Available for Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 278,126	$ 221,311	$ 212,366
Unrealized Gains	4,698	2,758	4,065
Unrealized Losses	(531)	(1,030)	(498)
Fair Value (Estimated)	282,293	223,039	215,933
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	258,179	194,563	184,865
Unrealized Gains	3,848	1,509	2,921
Unrealized Losses	(513)	(962)	(276)
Fair Value (Estimated)	261,514	195,110	187,510
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	16,689	23,367	24,372
Unrealized Gains	795	1,201	1,104
Unrealized Losses	0	(62)	(186)
Fair Value (Estimated)	17,484	24,506	25,290
Other equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,258	3,381	3,129
Unrealized Gains	55	48	40
Unrealized Losses	(18)	(6)	(36)
Fair Value (Estimated)	$ 3,295	$ 3,423	$ 3,133

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 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

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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.

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