Segment Reporting - Reconciliation of Segment Information to Consolidated Financial Statements (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Operating income	$ 9,004		$ 22,253	$ 36,914	$ 22,523	$ 13,905		$ 31,085	$ 35,869	$ 28,294	$ 90,694		$ 109,153		$ 128,716
Business restructuring and asset impairments											(4,009)	[1]	(1,040)	[1]
Unallocated corporate expenses											(37,252)	[2]	(55,446)	[2]	(50,247)	[2]
Interest expense, net											(11,441)		(10,358)		(9,599)
Loss from equity in joint ventures											(5,008)		(5,336)		(4,724)
Other, net											1,290		2,171		1,329
Income Before Provision for Income Taxes	6,012		18,228	33,206	18,089	10,310		27,847	32,200	25,273	75,535		95,630		115,722
Assets	1,162,014					1,167,202					1,162,014		1,167,202		985,478
Unallocated corporate assets	32,109	[3]				96,253	[3]				32,109	[3]	96,253	[3]	34,764	[3]
Capital expenditures											101,819		92,865		83,159
Unallocated corporate expenditures											2,996		1,425		1,842
Depreciation and amortization											63,804		56,400		51,294
Unallocated corporate depreciation expenses											1,096		1,018		1,660
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income											131,955		165,639		178,963
Assets	1,129,905					1,070,949					1,129,905		1,070,949		950,714
Capital expenditures											98,823		91,440		81,317
Depreciation and amortization											$ 62,708		$ 55,382		$ 49,634

[1] See Note 21 regarding business restructuring and asset impairment costs.

[2] Unallocated corporate expenses primarily comprise corporate administrative expenses (e.g., corporate finance, legal, human resources, information systems, deferred compensation and environmental remediation) that are not included in segment operating income and not used to evaluate segment performance.

[3] The decline in unallocated corporate assets between 2013 and 2014 was primarily attributable to decreases in the balances of U.S. cash and cash equivalents, which are not allocated to segments. The increase in unallocated corporate assets between 2012 and 2013 was primarily attributable to increases in the balances of U.S. cash and cash equivalents and mutual fund investment assets, which are not allocated to segments.