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Investment Securities Amortized Cost and Estimated Fair Value of Available for Sale Securities (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013 | Jun. 30, 2013
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Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost | $ 301,501 | $ 315,963 | $ 293,016
Unrealized Gains | 6,455 | 2,966 | 4,032
Unrealized Losses | (4,076) | (13,105) | (9,313)
Fair Value (Estimated) | 303,880 | 305,824 | 287,735
Collateralized Mortgage Backed Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost | 165,978 | 180,109 | 157,023
Unrealized Gains | 2,417 | 1,392 | 2,014
Unrealized Losses | (1,692) | (3,772) | (1,513)
Fair Value (Estimated) | 166,703 | 177,729 | 157,524
US States and Political Subdivisions Debt Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost | 133,327 | 134,188 | 134,376
Unrealized Gains | 3,951 | 1,458 | 1,955
Unrealized Losses | (2,383) | (9,331) | (7,792)
Fair Value (Estimated) | 134,895 | 126,315 | 128,539
Equity Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost | 2,196 | 1,666 | 1,617
Unrealized Gains | 87 | 116 | 63
Unrealized Losses | (1) | (2) | (8)
Fair Value (Estimated) | $ 2,282 | $ 1,780 | $ 1,672

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- Definition 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 No definition available. + Details
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- 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 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&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=27724398&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=6871852&loc=d3e26610-111562 + Details
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- Definition This item represents the cost of debt and equity 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. + 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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