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Accumulated Other Comprehensive Loss - Summary of Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning balance |  |  | $ 469,577 |  |  |  | $ 469,577 |
Other Comprehensive Income (Loss), Net of Tax | $ (7,593) | $ 98 | 109 | $ 3,439 | $ 84 | $ 78 |  |
Tax benefit and Translation adjustment related to adoption of ASU |  |  |  |  |  | (134) |  |
Ending balance | 311,478 |  |  |  |  |  | 311,478 |
Interest Rate Derivatives [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Losses (gains) arising during period |  |  |  |  |  |  | (3,789) |
Amounts reclassified from accumulated other comprehensive loss |  |  |  |  |  |  | (1,197) |
Net other comprehensive income |  |  |  |  |  |  | (4,986) |
Ending balance | (4,986) |  |  |  |  |  | (4,986) |
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning balance |  |  | (21,814) |  |  | (20,149) | (21,814) | $ (20,149)
Losses (gains) arising during period |  |  |  |  |  |  | (5,164) | 3,439
Amounts reclassified from accumulated other comprehensive loss |  |  |  |  |  |  | 1,635 | 990
Income tax benefit |  |  |  |  |  |  | (880) | 1,077
Net other comprehensive income |  |  |  |  |  |  | (2,649) | 3,352
Tax benefit and Translation adjustment related to adoption of ASU | (2,707) |  |  |  |  |  | (2,707) |
Ending balance | (27,170) |  |  | (16,797) |  |  | (27,170) | (16,797)
Accumulated Other-than-Temporary Impairment Attributable to Parent [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning balance |  |  | (6,210) |  |  | (6,543) | (6,210) | (6,543)
Amounts reclassified from accumulated other comprehensive loss |  |  |  |  |  |  | 249 | 249
Net other comprehensive income |  |  |  |  |  |  | 249 | 249
Ending balance | (5,961) |  |  | (6,294) |  |  | (5,961) | (6,294)
AOCI Attributable to Parent [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning balance |  |  | (28,024) |  |  | (26,692) | (28,024) | (26,692)
Losses (gains) arising during period |  |  |  |  |  |  | (8,953) | 3,439
Amounts reclassified from accumulated other comprehensive loss |  |  |  |  |  |  | 687 | 1,239
Income tax benefit |  |  |  |  |  |  | (880) | 1,077
Net other comprehensive income |  |  |  |  |  |  | (7,386) | 3,601
Other Comprehensive Income (Loss), Net of Tax | (7,593) | $ 98 | $ 109 | 3,439 | $ 84 | $ 78 |  |
Tax benefit and Translation adjustment related to adoption of ASU | (2,707) |  |  |  |  |  | (2,707) |
Ending balance | $ (38,117) |  |  | $ (23,091) |  |  | $ (38,117) | $ (23,091)

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