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SECURITIES AVAILABLE FOR SALE (Tables) | 3 Months Ended
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Mar. 31, 2021
SECURITIES AVAILABLE FOR SALE |
Summary of Securities Available for Sale | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Unrealized | ​ | Unrealized | ​ | ​ | ​
(in thousands) |  | Amortized Cost |  | Gains |  | Losses |  | Fair Value
March 31, 2021 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Mortgage-backed securities: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
US Government-sponsored enterprises | ​ | $ | 213,049 | ​ | $ | 4,860 | ​ | $ | (3,302) | ​ | $ | 214,607
US Government agency | ​ |  | 74,293 | ​ |  | 2,211 | ​ |  | (319) | ​ |  | 76,185
Private label | ​ |  | 47,576 | ​ |  | 111 | ​ |  | (146) | ​ |  | 47,541
Obligations of states and political subdivisions thereof | ​ |  | 185,985 | ​ |  | 3,081 | ​ |  | (1,203) | ​ |  | 187,863
Corporate bonds | ​ |  | 99,616 | ​ |  | 1,560 | ​ |  | (969) | ​ |  | 100,207
Total securities available for sale | ​ | $ | 620,519 | ​ | $ | 11,823 | ​ | $ | (5,939) | ​ | $ | 626,403
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Unrealized | ​ | Unrealized | ​ | ​ | ​
(in thousands) |  | Amortized Cost |  | Gains |  | Losses |  | Fair Value
December 31, 2020 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Mortgage-backed securities: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
US Government-sponsored enterprises | ​ | $ | 206,834 | ​ | $ | 6,018 | ​ | $ | (462) | ​ | $ | 212,390
US Government agency | ​ |  | 82,878 | ​ |  | 2,870 | ​ |  | (116) | ​ |  | 85,632
Private label | ​ |  | 19,810 | ​ |  | 40 | ​ |  | (141) | ​ |  | 19,709
Obligations of states and political subdivisions thereof | ​ |  | 164,766 | ​ |  | 4,244 | ​ |  | (6) | ​ |  | 169,004
Corporate bonds | ​ |  | 97,689 | ​ |  | 1,465 | ​ |  | (843) | ​ |  | 98,311
Total securities available for sale | ​ | $ | 571,977 | ​ | $ | 14,637 | ​ | $ | (1,568) | ​ | $ | 585,046
Schedule of Amortized Cost and Estimated Fair Value of Available for Sale (AFS) Securities, Segregated by Contractual Maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Available for sale
(in thousands) |  | Amortized Cost |  | Fair Value
Within 1 year |  | $ | 4,776 | ​ | $ | 4,848
Over 1 year to 5 years | ​ |  | 20,745 | ​ |  | 20,965
Over 5 years to 10 years | ​ |  | 75,062 | ​ |  | 73,650
Over 10 years | ​ |  | 185,018 | ​ |  | 188,607
Total bonds and obligations | ​ |  | 285,601 | ​ |  | 288,070
Mortgage-backed securities | ​ |  | 334,918 | ​ |  | 338,333
Total securities available for sale | ​ | $ | 620,519 | ​ | $ | 626,403
Schedule of Gains and Losses from Sale of AFS Securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | March 31,
(in thousands) |  | 2021 |  | 2020
Gross gains on sales of available for sale securities | ​ | $ | — | ​ | $ | 146
Gross losses on sales of available for sale securities | ​ |  | — | ​ |  | (11)
Net gains on sale of available for sale securities | ​ | $ | — | ​ | $ | 135
Schedule of Securities with Unrealized Losses, Segregated by the Duration of Continuous Unrealized Loss Positions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less Than Twelve Months | ​ | Over Twelve Months | ​ | Total
​ | ​ | Gross |  | ​ | ​ |  | Gross |  | ​ | ​ |  | Gross |  | ​ | ​
​ | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair
(in thousands) |  | Losses |  | Value |  | Losses |  | Value |  | Losses |  | Value
March 31, 2021 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Mortgage-backed securities: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
US Government-sponsored enterprises | ​ | $ | 3,073 | ​ | $ | 96,384 | ​ | $ | 229 | ​ | $ | 3,803 | ​ | $ | 3,302 | ​ | $ | 100,187
US Government agency | ​ |  | 300 | ​ |  | 14,716 | ​ |  | 19 | ​ |  | 4,204 | ​ |  | 319 | ​ |  | 18,920
Private label | ​ |  | 2 | ​ |  | 15,822 | ​ |  | 144 | ​ |  | 19,257 | ​ |  | 146 | ​ |  | 35,079
Obligations of states and political subdivisions thereof | ​ |  | 1,203 | ​ |  | 56,813 | ​ |  | — | ​ |  | — | ​ |  | 1,203 | ​ |  | 56,813
Corporate bonds | ​ |  | 128 | ​ |  | 14,622 | ​ |  | 841 | ​ |  | 19,158 | ​ |  | 969 | ​ |  | 33,780
Total securities available for sale | ​ | $ | 4,706 | ​ | $ | 198,357 | ​ | $ | 1,233 | ​ | $ | 46,422 | ​ | $ | 5,939 | ​ | $ | 244,779
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less Than Twelve Months | ​ | Over Twelve Months | ​ | Total
​ |  | Gross |  | ​ | ​ |  | Gross |  | ​ | ​ |  | Gross |  | ​ | ​
​ | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair
(in thousands) | ​ | Losses | ​ | Value | ​ | Losses | ​ | Value | ​ | Losses | ​ | Value
December 31, 2020 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Mortgage-backed securities: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
US Government-sponsored enterprises | ​ | $ | 209 | ​ | $ | 40,285 | ​ | $ | 253 | ​ | $ | 4,323 | ​ | $ | 462 | ​ | $ | 44,608
US Government agency | ​ |  | 45 | ​ |  | 6,776 | ​ |  | 71 | ​ |  | 3,297 | ​ |  | 116 | ​ |  | 10,073
Private label | ​ |  | — | ​ |  | — | ​ |  | 141 | ​ |  | 19,514 | ​ |  | 141 | ​ |  | 19,514
Obligations of states and political subdivisions thereof | ​ |  | 6 | ​ |  | 5,577 | ​ |  | — | ​ |  | — | ​ |  | 6 | ​ |  | 5,577
Corporate bonds | ​ |  | 555 | ​ |  | 21,774 | ​ |  | 288 | ​ |  | 11,712 | ​ |  | 843 | ​ |  | 33,486
Total securities available for sale | ​ | $ | 815 | ​ | $ | 74,412 | ​ | $ | 753 | ​ | $ | 38,846 | ​ | $ | 1,568 | ​ | $ | 113,258

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 + Details
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