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Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Comprehensive income attributable to common stockholders |  |  |
Net (loss) income | $ (1,579) | $ 515 | $ 2,912
Other comprehensive income/(loss): |  |  |
Unrealized (loss) gain on available-for-sale securities | (100) | 62 | (188)
Benefit plan adjustments | 404 | (371) | (1,301)
Benefit plan reclassification for losses included in net income | 0 | 0 | 536
Unrealized interest rate swap gains/(losses) | 970 | 1,040 | 678
Other comprehensive income (loss) before taxes | 1,602 | 945 | (41)
Benefit (provision) for income taxes related to other comprehensive (loss) income items | (627) | (282) | 38
Other comprehensive income (loss) | 975 | 663 | (3)
Comprehensive (loss) income | (604) | 1,178 | 2,909
Comprehensive (loss) income attributable to non-controlling interests | (24) | (43) | (38)
Comprehensive (loss) income attributable to common stockholders | (580) | 1,221 | 2,947
SERP |  |  |
Other comprehensive income/(loss): |  |  |
Benefit plan adjustments | 328 | 214 | $ 234
Benefit plan reclassification for losses included in net income | $ 313 | $ 214 |

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