Supplemental Guarantor Financial Information - Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 27,408	$ 50,240	$ 65,953	$ 101,105
Trade receivables, net of allowance of $2,492 and $2,343	214,643	192,692
Inventories	258,161	215,669
Deferred income taxes	22,435	30,263
Income tax receivable	34,502	14,455
Prepaid expenses and other current assets	27,738	35,868
Total current assets	584,887	539,187
Investment in equity method investments	37,038	43,160
Property, plant, and equipment, net	1,057,628	993,207
Identifiable intangible and other assets, net	737,270	729,011
Goodwill	1,068,540	1,068,276
Total Assets	3,485,363	3,372,841
Current liabilities:
Accounts payable and accrued expenses	468,408	469,764
Current portion of debt and capital lease obligations	21,194	21,158
Income tax payable	1,792	496
Total current liabilities	491,394	491,418
Long-term debt and capital lease obligations	1,533,447	1,495,822
Deferred income taxes	272,341	267,010
Other long-term liabilities	40,143	42,104
Total liabilities	2,337,325	2,296,354
Total shareholders’ equity	1,148,038	1,076,487	1,045,665	961,439
Total Liabilities and Shareholders’ Equity	3,485,363	3,372,841
Operating Segments [Member]
Current assets:
Cash and cash equivalents	27,408	50,240	65,953	101,105
Trade receivables, net of allowance of $2,492 and $2,343	214,643	192,692
Inventories	258,161	215,669
Deferred income taxes	22,435	30,263
Income tax receivable	34,502	14,455
Prepaid expenses and other current assets	27,738	35,868
Intercompany Receivable, Net, Current	0	0
Total current assets	584,887	539,187
Investment in equity method investments	37,038	43,160
Investment in consolidated subsidiaries	0	0
Property, plant, and equipment, net	1,057,628	993,207
Deferred income taxes	0	0
Identifiable intangible and other assets, net	737,270	729,011
Goodwill	1,068,540	1,068,276
Total Assets	3,485,363	3,372,841
Current liabilities:
Accounts payable and accrued expenses	468,408	469,764
Current portion of debt and capital lease obligations	21,194	21,158
Income tax payable	1,792	496
Intercompany payables	0	0
Total current liabilities	491,394	491,418
Long-term debt and capital lease obligations	1,533,447	1,495,822
Deferred income taxes	272,341	267,010
Other long-term liabilities	40,143	42,104
Total liabilities	2,337,325	2,296,354
Total shareholders’ equity	1,148,038	1,076,487
Total Liabilities and Shareholders’ Equity	3,485,363	3,372,841
Consolidation, Eliminations [Member]
Current assets:
Cash and cash equivalents	0	0	0	0
Trade receivables, net of allowance of $2,492 and $2,343	0	0
Inventories	0	0
Deferred income taxes	0	0
Income tax receivable	0	0
Prepaid expenses and other current assets	0	0
Intercompany Receivable, Net, Current	(1,558,980)	(1,591,537)
Total current assets	(1,558,980)	(1,591,537)
Investment in equity method investments	0	0
Investment in consolidated subsidiaries	(2,448,792)	(2,407,731)
Property, plant, and equipment, net	0	0
Deferred income taxes	(20,230)	(20,835)
Identifiable intangible and other assets, net	0	0
Goodwill	0	0
Total Assets	(4,028,002)	(4,020,103)
Current liabilities:
Accounts payable and accrued expenses	0	0
Current portion of debt and capital lease obligations	0	0
Income tax payable	0	0
Intercompany payables	(1,558,980)	(1,591,537)
Total current liabilities	(1,558,980)	(1,591,537)
Long-term debt and capital lease obligations	0	0
Deferred income taxes	(20,230)	(20,835)
Other long-term liabilities	0	0
Total liabilities	(1,579,210)	(1,612,372)
Total shareholders’ equity	(2,448,792)	(2,407,731)
Total Liabilities and Shareholders’ Equity	(4,028,002)	(4,020,103)
Parent Company [Member] | Operating Segments [Member]
Current assets:
Cash and cash equivalents	0	0	0	0
Trade receivables, net of allowance of $2,492 and $2,343	1,633	317
Inventories	0	0
Deferred income taxes	11,418	12,305
Income tax receivable	34,472	13,382
Prepaid expenses and other current assets	1,295	4,632
Intercompany Receivable, Net, Current	1,086,156	1,087,095
Total current assets	1,134,974	1,117,731
Investment in equity method investments	3,361	0
Investment in consolidated subsidiaries	2,026,674	1,968,899
Property, plant, and equipment, net	7,202	7,953
Deferred income taxes	20,230	20,835
Identifiable intangible and other assets, net	32,101	31,803
Goodwill	0	0
Total Assets	3,224,542	3,147,221
Current liabilities:
Accounts payable and accrued expenses	42,120	41,478
Current portion of debt and capital lease obligations	20,000	20,000
Income tax payable	0	0
Intercompany payables	473,356	504,442
Total current liabilities	535,476	565,920
Long-term debt and capital lease obligations	1,513,245	1,475,000
Deferred income taxes	0	0
Other long-term liabilities	27,783	29,814
Total liabilities	2,076,504	2,070,734
Total shareholders’ equity	1,148,038	1,076,487
Total Liabilities and Shareholders’ Equity	3,224,542	3,147,221
Guarantor Subsidiaries [Member] | Operating Segments [Member]
Current assets:
Cash and cash equivalents	2,013	524	606	673
Trade receivables, net of allowance of $2,492 and $2,343	139,989	134,352
Inventories	219,164	182,770
Deferred income taxes	8,871	15,742
Income tax receivable	0	0
Prepaid expenses and other current assets	13,436	18,318
Intercompany Receivable, Net, Current	472,824	504,442
Total current assets	856,297	856,148
Investment in equity method investments	0	3,000
Investment in consolidated subsidiaries	422,118	438,832
Property, plant, and equipment, net	846,162	795,696
Deferred income taxes	0	0
Identifiable intangible and other assets, net	616,751	600,592
Goodwill	928,280	916,482
Total Assets	3,669,608	3,610,750
Current liabilities:
Accounts payable and accrued expenses	309,406	319,247
Current portion of debt and capital lease obligations	1,194	1,158
Income tax payable	0	0
Intercompany payables	1,065,383	1,062,081
Total current liabilities	1,375,983	1,382,486
Long-term debt and capital lease obligations	20,202	20,822
Deferred income taxes	244,876	236,983
Other long-term liabilities	1,873	1,560
Total liabilities	1,642,934	1,641,851
Total shareholders’ equity	2,026,674	1,968,899
Total Liabilities and Shareholders’ Equity	3,669,608	3,610,750
Non-Guarantor Subsidiaries [Member] | Operating Segments [Member]
Current assets:
Cash and cash equivalents	25,395	49,716	$ 65,347	$ 100,432
Trade receivables, net of allowance of $2,492 and $2,343	73,021	58,023
Inventories	38,997	32,899
Deferred income taxes	2,146	2,216
Income tax receivable	30	1,073
Prepaid expenses and other current assets	13,007	12,918
Intercompany Receivable, Net, Current	0	0
Total current assets	152,596	156,845
Investment in equity method investments	33,677	40,160
Investment in consolidated subsidiaries	0	0
Property, plant, and equipment, net	204,264	189,558
Deferred income taxes	0	0
Identifiable intangible and other assets, net	88,418	96,616
Goodwill	140,260	151,794
Total Assets	619,215	634,973
Current liabilities:
Accounts payable and accrued expenses	116,882	109,039
Current portion of debt and capital lease obligations	0	0
Income tax payable	1,792	496
Intercompany payables	20,241	25,014
Total current liabilities	138,915	134,549
Long-term debt and capital lease obligations	0	0
Deferred income taxes	47,695	50,862
Other long-term liabilities	10,487	10,730
Total liabilities	197,097	196,141
Total shareholders’ equity	422,118	438,832
Total Liabilities and Shareholders’ Equity	$ 619,215	$ 634,973