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Investment in Securities (Schedule of Investement Securities) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Investment [Line Items] |  |
Amortized Cost | $ 312,153 | $ 322,087
Gross Unrealized Losses | 8,537 | 19,960
Gross Unrealized Gains | 2,923 | 112
Fair Value | 317,767 | 341,935
State and Political Subdivisions [Member] |  |
Investment [Line Items] |  |
Amortized Cost | 308,403 | 315,345
Gross Unrealized Losses | 8,537 | 19,960
Gross Unrealized Gains | 2,923 | 112
Fair Value | 314,017 | 335,193
Certificates of Deposit [Member] |  |
Investment [Line Items] |  |
Amortized Cost | 3,750 | 6,742
Gross Unrealized Losses |  |
Gross Unrealized Gains |  |
Fair Value | $ 3,750 | $ 6,742

X
- Definition Amount of accumulated pre-tax unrealized gains on investments in available-for-sale securities recognized in Accumulated Other Comprehensive Income (AOCI). + References No definition available. + Details
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- Definition Amount of accumulated pre-tax unrealized loss before deducting unrealized gain on investments in available-for-sale securities recognized in Accumulated Other Comprehensive Income (AOCI). + 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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