Changes in Accumulated Other Comprehensive Loss by Component - Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Thousands |
3 Months Ended |
Mar. 31, 2018 |
Mar. 31, 2017 |
| AOCI Attributable to Parent, Net of Tax [Roll Forward] |
|
|
| Beginning Balance |
$ 1,185,756
|
|
| Other comprehensive income (loss) before reclassifications |
21,571
|
$ 12,128
|
| Foreign currency translation effect |
(2,900)
|
(865)
|
| Income tax effect |
(416)
|
149
|
| Amount reclassified from accumulated other comprehensive loss |
|
|
| Cash flow hedges |
1,493
|
(10)
|
| Amortization of prior service credit |
(135)
|
(141)
|
| Amortization of actuarial loss |
9,345
|
10,591
|
| Income tax effect |
(2,382)
|
(3,715)
|
| Other comprehensive income |
26,576
|
18,137
|
| Ending Balance |
1,204,026
|
|
| Cumulative Translation Adjustment |
|
|
| AOCI Attributable to Parent, Net of Tax [Roll Forward] |
|
|
| Beginning Balance |
(39,940)
|
(75,415)
|
| Other comprehensive income (loss) before reclassifications |
20,925
|
12,517
|
| Amount reclassified from accumulated other comprehensive loss |
|
|
| Other comprehensive income |
20,925
|
12,517
|
| Ending Balance |
(19,015)
|
(62,898)
|
| Derivative Instruments |
|
|
| AOCI Attributable to Parent, Net of Tax [Roll Forward] |
|
|
| Beginning Balance |
349
|
1,967
|
| Other comprehensive income (loss) before reclassifications |
646
|
(389)
|
| Income tax effect |
(416)
|
149
|
| Amount reclassified from accumulated other comprehensive loss |
|
|
| Cash flow hedges |
1,493
|
(10)
|
| Income tax effect |
(172)
|
4
|
| Other comprehensive income |
1,551
|
(246)
|
| Ending Balance |
1,900
|
1,721
|
| Post-retirement Benefits |
|
|
| AOCI Attributable to Parent, Net of Tax [Roll Forward] |
|
|
| Beginning Balance |
(438,887)
|
(471,703)
|
| Other comprehensive income (loss) before reclassifications |
|
0
|
| Foreign currency translation effect |
(2,900)
|
(865)
|
| Income tax effect |
|
0
|
| Amount reclassified from accumulated other comprehensive loss |
|
|
| Amortization of prior service credit |
(135)
|
(141)
|
| Amortization of actuarial loss |
9,345
|
10,591
|
| Income tax effect |
(2,210)
|
(3,719)
|
| Other comprehensive income |
4,100
|
5,866
|
| Ending Balance |
(434,787)
|
(465,837)
|
| Total |
|
|
| AOCI Attributable to Parent, Net of Tax [Roll Forward] |
|
|
| Beginning Balance |
(478,478)
|
(545,151)
|
| Amount reclassified from accumulated other comprehensive loss |
|
|
| Ending Balance |
$ (451,902)
|
$ (527,014)
|