Accumulated Other Comprehensive Income - Summary of Reclassifications Out of Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance	$ (164,550)	$ (165,709)	$ (163,966)	$ (166,741)
Other comprehensive income before reclassifications (net of tax)	13,829	9,066	5,458	4,952
Amounts reclassified from accumulated other comprehensive income (net of tax)	4,074	2,500	11,861	7,646
Net current period other comprehensive income (loss)	17,903	11,566	17,319	12,598
Ending Balance	(146,647)	(154,143)	(146,647)	(154,143)
Currency Translation Adjustments [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance	(7,914)	(15,618)	316	(11,043)
Other comprehensive income before reclassifications (net of tax)	14,263	9,048	6,033	4,473
Amounts reclassified from accumulated other comprehensive income (net of tax)
Net current period other comprehensive income (loss)	14,263	9,048	6,033	4,473
Ending Balance	6,349	(6,570)	6,349	(6,570)
Unrealized Gain (Loss) On Cash Flow Hedges [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance	(379)	844	(425)	1,185
Other comprehensive income before reclassifications (net of tax)	(434)	18	(575)	479
Amounts reclassified from accumulated other comprehensive income (net of tax)	280	(513)	467	(1,315)
Net current period other comprehensive income (loss)	(154)	(495)	(108)	(836)
Ending Balance	(533)	349	(533)	349
Amortization of Deferred Benefit Pension Plan Items [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance	(152,056)	(146,969)	(159,560)	(153,002)
Other comprehensive income before reclassifications (net of tax)
Amounts reclassified from accumulated other comprehensive income (net of tax)	3,746	3,057	11,250	9,090
Net current period other comprehensive income (loss)	3,746	3,057	11,250	9,090
Ending Balance	148,310	(143,912)	148,310	(143,912)
Change in Other Postretirement Defined Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance	(4,201)	(3,966)	(4,297)	(3,881)
Other comprehensive income before reclassifications (net of tax)
Amounts reclassified from accumulated other comprehensive income (net of tax)	48	(44)	144	(129)
Net current period other comprehensive income (loss)	48	(44)	144	(129)
Ending Balance	$ (4,153)	$ (4,010)	$ (4,153)	$ (4,010)

- 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