Investment Securities - Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Total securities
Amortized Cost	$ 251,129	$ 289,353
Unrealized Gain	4,020	1,953
Unrealized Loss	(288)	(1,461)
Estimated Fair Value	254,861	289,845
Available for sale:
Total	241,837	279,711
Unrealized Gain	3,922	1,953
Unrealized Loss	(288)	(1,391)
Investment securities available for sale, at fair value	245,471	280,273
Held to maturity:
Amortized Cost	9,292	9,642
Unrealized Gain	98	0
Unrealized Loss	0	(70)
Estimated Fair Value	9,390	9,572
Municipal bonds
Available for sale:
Total	115,755	128,546
Unrealized Gain	3,044	1,796
Unrealized Loss	0	(97)
Investment securities available for sale, at fair value	118,799	130,245
Collateralized mortgage obligation
Available for sale:
Total	22,570	24,722
Unrealized Gain	274	4
Unrealized Loss	0	(183)
Investment securities available for sale, at fair value	22,844	24,543
Mortgage-backed securities
Available for sale:
Total	103,512	126,443
Unrealized Gain	604	153
Unrealized Loss	(288)	(1,111)
Investment securities available for sale, at fair value	103,828	125,485
Held to maturity:
Amortized Cost	8,076	8,400
Unrealized Gain	98	0
Unrealized Loss	0	(70)
Estimated Fair Value	8,174	8,330
Other
Held to maturity:
Amortized Cost	1,216	1,242
Unrealized Gain	0	0
Unrealized Loss	0	0
Estimated Fair Value	$ 1,216	$ 1,242

Available-For-Sale And Held-To-Maturity Securities [Abstract]

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Available-for-sale Securities And Held-To-Maturity Securities, Accumulated Gross Unrealized Gain, before Tax

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Available-for-sale Securities And Held-To-Maturity Securities, Accumulated Gross Unrealized Loss, before Tax

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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.

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

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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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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Amount of accumulated unrealized gain on investments in debt securities classified as held-to-maturity.

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Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity in a continuous loss position.

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Fair value of investments in debt securities classified as held-to-maturity.

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Sum of the carrying amounts as of the balance sheet date of all investments.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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