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Securities (Details 4) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 Securities | Dec. 31, 2013 Securities
Unrealized Gain Loss On Investments [Line Items] |  |
Estimated Fair Value, Less than 12 months | $ 86,703 | $ 108,998
Unrealized Losses, Less than 12 months | (2,079) | (4,130)
Estimated Fair Value, 12 months or longer | 6,865 | 3,446
Unrealized Losses, 12 months or longer | (3,063) | (3,379)
Estimated Fair Value, Total | 93,568 | 112,444
Unrealized Losses, Total | (5,142) | (7,509)
Number of securities, Unrealized Losses, Less than 12 months | 78 | 117
Number of securities, Unrealized Losses, 12 months or longer | 13 | 8
Number of securities, Unrealized Losses, Total | 91 | 125
US Government-sponsored Enterprises Debt Securities [Member] |  |
Unrealized Gain Loss On Investments [Line Items] |  |
Estimated Fair Value, Less than 12 months | 12,213 | 18,360
Unrealized Losses, Less than 12 months | (287) | (637)
Estimated Fair Value, 12 months or longer | 0 | 0
Unrealized Losses, 12 months or longer | 0 | 0
Estimated Fair Value, Total | 12,213 | 18,360
Unrealized Losses, Total | (287) | (637)
Collateralized Mortgage Backed Securities [Member] |  |
Unrealized Gain Loss On Investments [Line Items] |  |
Estimated Fair Value, Less than 12 months | 56,642 | 62,748
Unrealized Losses, Less than 12 months | (1,276) | (1,922)
Estimated Fair Value, 12 months or longer | 1,833 | 0
Unrealized Losses, 12 months or longer | (109) | 0
Estimated Fair Value, Total | 58,475 | 62,748
Unrealized Losses, Total | (1,385) | (1,922)
Collateralized Debt Obligations [Member] |  |
Unrealized Gain Loss On Investments [Line Items] |  |
Estimated Fair Value, Less than 12 months | 0 | 0
Unrealized Losses, Less than 12 months | 0 | 0
Estimated Fair Value, 12 months or longer | 2,430 | 1,968
Unrealized Losses, 12 months or longer | (2,778) | (3,240)
Estimated Fair Value, Total | 2,430 | 1,968
Unrealized Losses, Total | (2,778) | (3,240)
Municipal Bonds [Member] |  |
Unrealized Gain Loss On Investments [Line Items] |  |
Estimated Fair Value, Less than 12 months | 17,848 | 27,890
Unrealized Losses, Less than 12 months | (516) | (1,571)
Estimated Fair Value, 12 months or longer | 2,602 | 1,478
Unrealized Losses, 12 months or longer | (176) | (139)
Estimated Fair Value, Total | 20,450 | 29,368
Unrealized Losses, Total | $ (692) | $ (1,710)

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- Definition Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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