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2. Investment securities, Continuous Unrealized Loss Position (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2014 | Dec. 31, 2013
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | $ 38,528 | $ 129,742
Less than 12 Months, Unrealized Losses | 263 | 5,639
12 Months or More, Fair Value | 57,824 | 12,463
12 Months or More, Unrealized Losses | 1,488 | 356
Total, Fair Value | 96,352 | 142,205
Total, Unrealized Losses | 1,751 | 5,995
Mortgage-backed securities |  |
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 8,550 | 40,857
Less than 12 Months, Unrealized Losses | 6 | 691
12 Months or More, Fair Value | 18,386 | 10,128
12 Months or More, Unrealized Losses | 164 | 78
Total, Fair Value | 26,936 | 50,985
Total, Unrealized Losses | 170 | 769
U.S. Government sponsored enterprises |  |
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 16,483 | 9,714
Less than 12 Months, Unrealized Losses | 217 | 69
12 Months or More, Fair Value | 0 | 0
12 Months or More, Unrealized Losses | 0 | 0
Total, Fair Value | 16,483 | 9,714
Total, Unrealized Losses | 217 | 69
State and political subdivisions |  |
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 12,495 | 77,187
Less than 12 Months, Unrealized Losses | 40 | 4,863
12 Months or More, Fair Value | 38,905 | 1,824
12 Months or More, Unrealized Losses | 1,302 | 224
Total, Fair Value | 51,400 | 79,011
Total, Unrealized Losses | 1,342 | 5,087
Corporate bonds |  |
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 1,000 | 1,984
Less than 12 Months, Unrealized Losses | 0 | 16
12 Months or More, Fair Value | 533 | 511
12 Months or More, Unrealized Losses | 22 | 54
Total, Fair Value | 1,533 | 2,495
Total, Unrealized Losses | $ 22 | $ 70

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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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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + 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)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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- Definition Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: 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 This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized 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 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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