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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Document Fiscal Year Focus |  |  | 2015 |
Net income | $ 4,039,000 | $ 2,520,000 | $ 7,235,000 | $ 4,640,000
Interest rate swaps: |  |  |  |
Adjustment for amortization of losses included in net income | 6,000 | 5,000 | 11,000 | 10,000
Income tax expense | 2,000 | 2,000 | 4,000 | 4,000
Post retirement benefit plan adjustments: |  |  |  |
Net actuarial loss | 42,000 | 12,000 | 84,000 | 24,000
Prior service costs | (124,000) | (124,000) | (248,000) | (248,000)
Income tax benefit | 24,000 | 35,000 | 49,000 | 70,000
Comprehensive income | $ 3,985,000 | $ 2,446,000 | $ 7,127,000 | 4,492,000
Derivative [Member] |  |  |  |
Interest rate swaps: |  |  |  |
Income tax expense |  |  |  | 4,000
Other Postretirement Benefit Plans, Defined Benefit [Member] |  |  |  |
Post retirement benefit plan adjustments: |  |  |  |
Income tax benefit |  |  |  | $ 70,000

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