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Fair Value of Financial Instruments (Financial instruments Measured at Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Securities available for sale:
Securities available for sale	$ 343,270	$ 199,329
Recurring [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]
Securities available for sale:
Government-sponsored enterprise securities
Mortgage-backed securities
Corporate bonds
Equity securities
Securities available for sale
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Securities available for sale:
Government-sponsored enterprise securities	13,867	17,490
Mortgage-backed securities	295,213	148,065
Corporate bonds	34,190	33,600
Equity securities		174
Securities available for sale	343,270	199,329
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Securities available for sale:
Government-sponsored enterprise securities
Mortgage-backed securities
Corporate bonds
Equity securities
Securities available for sale
Recurring [Member] | Fair Value [Member]
Securities available for sale:
Government-sponsored enterprise securities	13,867	17,490
Mortgage-backed securities	295,213	148,065
Corporate bonds	34,190	33,600
Equity securities		174
Securities available for sale	343,270	199,329
Nonrecurring [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]
Securities available for sale:
Impaired loans
Foreclosed real estate
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Securities available for sale:
Impaired loans
Foreclosed real estate
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Securities available for sale:
Impaired loans	14,086	12,284
Foreclosed real estate	12,571	9,532
Nonrecurring [Member] | Fair Value [Member]
Securities available for sale:
Impaired loans	14,086	12,284
Foreclosed real estate	$ 12,571	$ 9,532

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Fair value of corporate bonds.

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Fair value of equity securities.

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- Definition

Fair value of impaired loans covered by loss sharing arrangements.

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fair value of other real estate covered by loss sharing agreements.

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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
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562

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Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as available-for-sale.

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