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2. Investment securities, Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | $ 29,467 | $ 36,155
Less than 12 Months, Unrealized Losses | 423 | 507
12 Months or More, Fair Value | 13,848 | 10,123
12 Months or More, Unrealized Losses | 261 | 209
Total, Fair Value | 43,315 | 46,278
Total, Unrealized Losses | 684 | 716
Mortgage-backed securities |  |
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 16,534 | 15,594
Less than 12 Months, Unrealized Losses | 321 | 290
12 Months or More, Fair Value | 0 | 0
12 Months or More, Unrealized Losses | 0 | 0
Total, Fair Value | 16,534 | 15,594
Total, Unrealized Losses | 321 | 290
U.S. Government sponsored enterprises |  |
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 5,832 | 10,120
Less than 12 Months, Unrealized Losses | 28 | 94
12 Months or More, Fair Value | 13,286 | 9,562
12 Months or More, Unrealized Losses | 234 | 180
Total, Fair Value | 19,118 | 19,682
Total, Unrealized Losses | 262 | 274
State and political subdivisions |  |
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 7,101 | 10,441
Less than 12 Months, Unrealized Losses | 74 | 123
12 Months or More, Fair Value | 562 | 561
12 Months or More, Unrealized Losses | 27 | 29
Total, Fair Value | 7,663 | 11,002
Total, Unrealized Losses | $ 101 | $ 152

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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=73527792&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=73527792&loc=d3e27290-111563 + Details
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