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2. Investment securities, Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Dec. 31, 2014
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | $ 20,359 | $ 3,999
Less than 12 Months, Unrealized Losses | 208 | 6
12 Months or More, Fair Value | 16,258 | 28,336
12 Months or More, Unrealized Losses | 278 | 426
Total, Fair Value | 36,617 | 32,335
Total, Unrealized Losses | 486 | 432
Mortgage-backed securities |  |
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 2,278 | 436
Less than 12 Months, Unrealized Losses | 18 | 1
12 Months or More, Fair Value | 0 | 2,963
12 Months or More, Unrealized Losses | 0 | 51
Total, Fair Value | 2,278 | 3,399
Total, Unrealized Losses | 18 | 52
U.S. Government sponsored enterprises |  |
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 2,319 | 2,996
Less than 12 Months, Unrealized Losses | 20 | 4
12 Months or More, Fair Value | 9,064 | 9,850
12 Months or More, Unrealized Losses | 109 | 132
Total, Fair Value | 11,383 | 12,846
Total, Unrealized Losses | 129 | 136
State and political subdivisions |  |
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 15,762 | 567
Less than 12 Months, Unrealized Losses | 170 | 1
12 Months or More, Fair Value | 6,668 | 14,998
12 Months or More, Unrealized Losses | 168 | 225
Total, Fair Value | 22,430 | 15,565
Total, Unrealized Losses | 338 | 226
Corporate bonds |  |
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 0 | 0
Less than 12 Months, Unrealized Losses | 0 | 0
12 Months or More, Fair Value | 526 | 525
12 Months or More, Unrealized Losses | 1 | 18
Total, Fair Value | 526 | 525
Total, Unrealized Losses | $ 1 | $ 18

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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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- Definition Amount of unrealized loss on securities classified as available-for-sale. + 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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