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Comprehensive Income Changes in Accumulated Other Comprehensive Income By Component (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Stockholders' equity, beginning balance | $ 301,728 | $ 269,584
Other comprehensive income or loss before reclassifications | 3,879 | 2,080
Amounts reclassified from accumulated other comprehensive income | 66 | 163
Other Comprehensive Income | 3,945 | 2,243
Stockholders' equity, ending balance | 309,398 | 276,609
Total |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Stockholders' equity, beginning balance | (6,357) | (13,810)
Stockholders' equity, ending balance | (2,412) | (11,567)
Unrealized Gains and Losses on Available for Sale Securities |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Stockholders' equity, beginning balance | 465 | (3,697)
Other comprehensive income or loss before reclassifications | 4,098 | 2,080
Amounts reclassified from accumulated other comprehensive income | 0 | 0
Other Comprehensive Income | 4,098 | 2,080
Stockholders' equity, ending balance | 4,563 | (1,617)
Unrealized Loss on Cash Flow Swap |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Stockholders' equity, beginning balance | 0 |
Other comprehensive income or loss before reclassifications | (219) |
Amounts reclassified from accumulated other comprehensive income | 0 |
Other Comprehensive Income | (219) |
Stockholders' equity, ending balance | (219) |
Net Actuarial Gain (Loss) |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Stockholders' equity, beginning balance | (5,847) | (8,971)
Other comprehensive income or loss before reclassifications | 0 | 0
Amounts reclassified from accumulated other comprehensive income | 27 | 121
Other Comprehensive Income | 27 | 121
Stockholders' equity, ending balance | (5,820) | (8,850)
Net Priot Service (Cost) Credit |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Stockholders' equity, beginning balance | (975) | (1,142)
Other comprehensive income or loss before reclassifications | 0 | 0
Amounts reclassified from accumulated other comprehensive income | 39 | 42
Other Comprehensive Income | 39 | 42
Stockholders' equity, ending balance | $ (936) | $ (1,100)

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