Investment Securities Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Investment securities available for sale:
Total	$ 289,993	$ 200,758	$ 282,059
Unrealized Gain	1,966	1,667	1,675
Unrealized Loss	(812)	(787)	(1,532)
Investment securities available for sale	291,147	201,638	282,202
Municipal bonds
Investment securities available for sale:
Total	129,064	88,599	97,358
Unrealized Gain	1,266	1,235	1,495
Unrealized Loss	(326)	(173)	(268)
Investment securities available for sale	130,004	89,661	98,585
Mortgage-backed securities
Investment securities available for sale:
Total	160,929	112,159	184,701
Unrealized Gain	700	432	180
Unrealized Loss	(486)	(614)	(1,264)
Investment securities available for sale	$ 161,143	$ 111,977	$ 183,617

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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

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-Name Accounting Standards Codification

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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.

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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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