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Securities (Tables) | 9 Months Ended
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Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract] |
Schedule of Available-for-sale Securities | The amortized cost and fair value of securities available-for-sale and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income were as follows:
|  | As of September 30, 2017
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | (In Thousands)
Available-for-sale: |  |  |  |  |  |  |  |
U.S. Government agency obligations - government-sponsored enterprises |  | $ | 3,799 |  |  | $ | 11 |  |  | $ | (3 | ) |  | $ | 3,807 |
Municipal obligations |  | 9,342 |  |  | 13 |  |  | (23 | ) |  | 9,332 |
Collateralized mortgage obligations - government issued |  | 22,750 |  |  | 301 |  |  | (149 | ) |  | 22,902 |
Collateralized mortgage obligations - government-sponsored enterprises |  | 95,608 |  |  | 165 |  |  | (684 | ) |  | 95,089 |
|  | $ | 131,499 |  |  | $ | 490 |  |  | $ | (859 | ) |  | $ | 131,130 |
|  | As of December 31, 2016
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | (In Thousands)
Available-for-sale: |  |  |  |  |  |  |  |
U.S. Government agency obligations - government-sponsored enterprises |  | $ | 6,298 |  |  | $ | 7 |  |  | $ | (10 | ) |  | $ | 6,295 |
Municipal obligations |  | 8,246 |  |  | 2 |  |  | (92 | ) |  | 8,156 |
Asset-backed securities |  | 1,116 |  |  | — |  |  | (35 | ) |  | 1,081 |
Collateralized mortgage obligations - government issued |  | 30,936 |  |  | 423 |  |  | (146 | ) |  | 31,213 |
Collateralized mortgage obligations - government-sponsored enterprises |  | 99,865 |  |  | 252 |  |  | (969 | ) |  | 99,148 |
|  | $ | 146,461 |  |  | $ | 684 |  |  | $ | (1,252 | ) |  | $ | 145,893 |
Schedule of Held-to-maturity Securities | The amortized cost and fair value of securities held-to-maturity and the corresponding amounts of gross unrealized gains and losses were as follows:
|  | As of September 30, 2017
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | (In Thousands)
Held-to-maturity: |  |  |  |  |  |  |  |
U.S. Government agency obligations - government-sponsored enterprises |  | $ | 1,498 |  |  | $ | — |  |  | $ | (5 | ) |  | $ | 1,493 |
Municipal obligations |  | 21,928 |  |  | 443 |  |  | (14 | ) |  | 22,357 |
Collateralized mortgage obligations - government issued |  | 9,601 |  |  | 16 |  |  | (33 | ) |  | 9,584 |
Collateralized mortgage obligations - government-sponsored enterprises |  | 5,846 |  |  | 12 |  |  | (18 | ) |  | 5,840 |
|  | $ | 38,873 |  |  | $ | 471 |  |  | $ | (70 | ) |  | $ | 39,274 |
|  | As of December 31, 2016
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | (In Thousands)
Held-to-maturity: |  |  |  |  |  |  |  |
U.S. Government agency obligations - government-sponsored enterprises |  | $ | 1,497 |  |  | $ | 2 |  |  | $ | (5 | ) |  | $ | 1,494 |
Municipal obligations |  | 21,173 |  |  | 62 |  |  | (78 | ) |  | 21,157 |
Collateralized mortgage obligations - government issued |  | 9,148 |  |  | 17 |  |  | (38 | ) |  | 9,127 |
Collateralized mortgage obligations - government-sponsored enterprises |  | 6,794 |  |  | 6 |  |  | (58 | ) |  | 6,742 |
|  | $ | 38,612 |  |  | $ | 87 |  |  | $ | (179 | ) |  | $ | 38,520 |
Investments Classified by Contractual Maturity | The amortized cost and fair value of securities by contractual maturity at September 30, 2017 are shown below. Actual maturities may differ from contractual maturities because issuers have the right to call or prepay certain obligations with or without call or prepayment penalties.
|  | Available-for-Sale |  | Held-to-Maturity
|  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
|  | (In Thousands)
Due in one year or less |  | $ | 6,785 |  |  | $ | 6,783 |  |  | $ | — |  |  | $ | — |
Due in one year through five years |  | 13,156 |  |  | 13,194 |  |  | 11,177 |  |  | 11,326 |
Due in five through ten years |  | 48,051 |  |  | 48,168 |  |  | 13,258 |  |  | 13,495 |
Due in over ten years |  | 63,507 |  |  | 62,985 |  |  | 14,438 |  |  | 14,453 |
|  | $ | 131,499 |  |  | $ | 131,130 |  |  | $ | 38,873 |  |  | $ | 39,274 |
Schedule of Unrealized Loss on Investments | A summary of unrealized loss information for securities available-for-sale, categorized by security type and length of time for which the security has been in a continuous unrealized loss position, follows:
|  | As of September 30, 2017
|  | Less than 12 Months |  | 12 Months or Longer |  | Total
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
|  | (In Thousands)
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency obligations - government-sponsored enterprises |  | $ | 800 |  |  | $ | — |  |  | $ | 1,997 |  |  | $ | 3 |  |  | $ | 2,797 |  |  | $ | 3 |
Municipal obligations |  | 1,916 |  |  | 9 |  |  | 3,011 |  |  | 14 |  |  | 4,927 |  |  | 23 |
Collateralized mortgage obligations - government issued |  | 3,679 |  |  | 14 |  |  | 6,185 |  |  | 135 |  |  | 9,864 |  |  | 149 |
Collateralized mortgage obligations - government-sponsored enterprises |  | 32,752 |  |  | 121 |  |  | 31,883 |  |  | 563 |  |  | 64,635 |  |  | 684 |
|  | $ | 39,147 |  |  | $ | 144 |  |  | $ | 43,076 |  |  | $ | 715 |  |  | $ | 82,223 |  |  | $ | 859 |
|  | As of December 31, 2016
|  | Less than 12 Months |  | 12 Months or Longer |  | Total
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
|  | (In Thousands)
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency obligations - government-sponsored enterprises |  | $ | 1,991 |  |  | $ | 10 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,991 |  |  | $ | 10 |
Municipal obligations |  | 7,207 |  |  | 89 |  |  | 406 |  |  | 3 |  |  | 7,613 |  |  | 92 |
Asset-backed securities |  | — |  |  | $ | — |  |  | 1,081 |  |  | 35 |  |  | 1,081 |  |  | 35 |
Collateralized mortgage obligations - government issued |  | 10,552 |  |  | 130 |  |  | 493 |  |  | 16 |  |  | 11,045 |  |  | 146 |
Collateralized mortgage obligations - government-sponsored enterprises |  | 54,843 |  |  | 931 |  |  | 1,819 |  |  | 38 |  |  | 56,662 |  |  | 969 |
|  | $ | 74,593 |  |  | $ | 1,160 |  |  | $ | 3,799 |  |  | $ | 92 |  |  | $ | 78,392 |  |  | $ | 1,252 |
A summary of unrealized loss information for securities held-to-maturity, categorized by security type and length of time for which the security has been in a continuous unrealized loss position, follows:
|  | As of September 30, 2017
|  | Less than 12 Months |  | 12 Months or Longer |  | Total
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
|  | (In Thousands)
Held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency obligations - government-sponsored enterprises |  | $ | 1,000 |  |  | $ | 5 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,000 |  |  | $ | 5 |
Municipal obligations |  | 853 |  |  | 11 |  |  | 260 |  |  | 3 |  |  | 1,113 |  |  | 14 |
Collateralized mortgage obligations - government issued |  | 2,806 |  |  | 8 |  |  | 3,804 |  |  | 25 |  |  | 6,610 |  |  | 33 |
Collateralized mortgage obligations - government-sponsored enterprises |  | — |  |  | — |  |  | 1,927 |  |  | 18 |  |  | 1,927 |  |  | 18 |
|  | $ | 4,659 |  |  | $ | 24 |  |  | $ | 5,991 |  |  | $ | 46 |  |  | $ | 10,650 |  |  | $ | 70 |
|  | As of December 31, 2016
|  | Less than 12 Months |  | 12 Months or Longer |  | Total
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
|  | (In Thousands)
Held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency obligations - government-sponsored enterprises |  | $ | 1,000 |  |  | $ | 5 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,000 |  |  | $ | 5 |
Municipal obligations |  | 9,472 |  |  | 78 |  |  | — |  |  | — |  |  | 9,472 |  |  | 78 |
Collateralized mortgage obligations - government issued |  | 6,980 |  |  | 38 |  |  | — |  |  | — |  |  | 6,980 |  |  | 38 |
Collateralized mortgage obligations - government-sponsored enterprises |  | 4,682 |  |  | 58 |  |  | — |  |  | — |  |  | 4,682 |  |  | 58 |
|  | $ | 22,134 |  |  | $ | 179 |  |  | $ | — |  |  | $ | — |  |  | $ | 22,134 |  |  | $ | 179 |

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- Definition Tabular disclosure of all investments in certain debt and equity securities for which the entity has the positive intent and ability to hold until maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27405-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803 Reference 5: 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=82897076&loc=d3e27337-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6435544&loc=d3e41834-113960 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5086-111524 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803 + Details
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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
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