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Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss), Net of Tax (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2018 USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |
Beginning balance | $ 1,434,866
Other comprehensive loss, net of tax | 12,352
Ending balance | 1,390,302
Foreign Currency Translation Component |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |
Beginning balance | (69,691)
Other comprehensive income attributable to Belden before reclassifications | 10,950
Amounts reclassified from accumulated other comprehensive income | 0
Other comprehensive loss, net of tax | 10,950
Ending balance | (58,741)
Pension and Other Postretirement Benefit Plans |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |
Beginning balance | (28,335)
Other comprehensive income attributable to Belden before reclassifications | 0
Amounts reclassified from accumulated other comprehensive income | 1,409
Other comprehensive loss, net of tax | 1,409
Ending balance | (26,926)
Accumulated Other Comprehensive Income (Loss) |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |
Beginning balance | (98,026)
Other comprehensive income attributable to Belden before reclassifications | 10,950
Amounts reclassified from accumulated other comprehensive income | 1,409
Other comprehensive loss, net of tax | 12,359
Ending balance | $ (85,667)

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