Accumulated Other Comprehensive Income - Summary of Reclassifications Out of Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance	$ (163,966)	$ (166,741)	$ (121,247)
Other comprehensive income before reclassifications (net of tax)	72,721	(7,582)	(54,943)
Amounts reclassified from accumulated other comprehensive income (net of tax)	15,888	10,357	9,449
Other comprehensive income (loss)	88,609	2,775	(45,494)
Ending Balance	(75,357)	(163,966)	(166,741)
Currency Translation Adjustments [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance	315	(11,043)	(883)
Other comprehensive income before reclassifications (net of tax)	14,826	11,358	(10,160)
Amounts reclassified from accumulated other comprehensive income (net of tax)
Other comprehensive income (loss)	14,826	11,358	(10,160)
Ending Balance	15,141	315	(11,043)
Unrealized Gain (Loss) on Cash Flow Hedges [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance	(424)	1,185
Other comprehensive income before reclassifications (net of tax)	(1,198)	(39)	1,308
Amounts reclassified from accumulated other comprehensive income (net of tax)	681	(1,570)	(123)
Other comprehensive income (loss)	(517)	(1,609)	1,185
Ending Balance	(941)	(424)	1,185
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance	(159,560)	(153,002)	(114,333)
Other comprehensive income before reclassifications (net of tax)	54,906	(18,657)	(48,452)
Amounts reclassified from accumulated other comprehensive income (net of tax)	15,107	12,099	9,783
Other comprehensive income (loss)	70,013	(6,558)	(38,669)
Ending Balance	(89,547)	(159,560)	(153,002)
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance	(4,297)	(3,881)	(6,031)
Other comprehensive income before reclassifications (net of tax)	4,187	(244)	2,361
Amounts reclassified from accumulated other comprehensive income (net of tax)	100	(172)	(211)
Other comprehensive income (loss)	4,287	(416)	2,150
Ending Balance	$ (10)	$ (4,297)	$ (3,881)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References+ Details