Supplemental Guarantor Financial Information - Consolidating Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 9,517	$ 25,716	$ 34,777	$ 43,566
Accounts receivable, net	83,069	87,952
Intercompany (payable) receivable	0	0
Inventories	83,550	83,930
Prepaid expenses	8,472	8,179
Other current assets	15,714	15,695
Total current assets	200,322	221,472
Property and equipment, net	303,617	309,664
Investments	0	0
Goodwill	61,927	68,975	61,127
Intangible assets	11,707	14,470
Non-current deferred tax asset	10,662	5,045
Other assets	5,809	4,438
Total assets	594,044	624,064	618,843
Current liabilities:
Notes payable	244	8,267
Accounts payable	41,827	42,220
Accrued expenses	56,109	61,368
Current maturities of long-term debt	4,406	2,166
Current portion of deferred tax liability	833	88
Total current liabilities	102,586	114,021
Long-term debt, net of current maturities	460,840	432,706
Liabilities under capital lease	3,945	0
Non-current deferred tax liability	10,416	16,350
Pension, other post-retirement and post-employment obligations	80,471	66,866
Other long-term liabilities	9,896	5,570
Intercompany loans	0	0
Total stockholders’ (deficit) equity	(74,110)	(11,449)
Total liabilities and stockholders’ deficit	594,044	624,064
Parent
Current assets:
Cash and cash equivalents	605	4,120	6,471	11,548
Accounts receivable, net	50	0
Intercompany (payable) receivable	(107,064)	(112,848)
Inventories	0	0
Prepaid expenses	546	398
Other current assets	0	514
Total current assets	(105,863)	(107,816)
Property and equipment, net	12,365	15,794
Investments	782,633	700,697
Goodwill	0	0
Intangible assets	9,001	10,964
Non-current deferred tax asset	0	0
Other assets	0	4
Total assets	698,136	619,643
Current liabilities:
Notes payable	0	0
Accounts payable	2,679	2,109
Accrued expenses	8,511	9,794
Current maturities of long-term debt	2,944	2,024
Total current liabilities	14,134	13,927
Long-term debt, net of current maturities	460,840	432,706
Liabilities under capital lease	3,503
Non-current deferred tax liability	97	327
Pension, other post-retirement and post-employment obligations	22,070	11,212
Other long-term liabilities	181	106
Intercompany loans	289,896	233,755
Total stockholders’ (deficit) equity	(92,585)	(72,390)
Total liabilities and stockholders’ deficit	698,136	619,643
Total Guarantors
Current assets:
Cash and cash equivalents	(15)	(10)	36	280
Accounts receivable, net	22,358	22,188
Intercompany (payable) receivable	107,590	110,434
Inventories	17,310	18,077
Prepaid expenses	1,470	936
Other current assets	2,021	3,729
Total current assets	150,734	155,354
Property and equipment, net	59,448	59,250
Investments	229,109	284,444
Goodwill	17,737	17,737
Intangible assets	1,664	3,094
Non-current deferred tax asset	0	0
Other assets	364	0
Total assets	459,056	519,879
Current liabilities:
Notes payable	0	0
Accounts payable	10,212	10,380
Accrued expenses	8,301	8,172
Current maturities of long-term debt	0	0
Total current liabilities	18,513	18,552
Long-term debt, net of current maturities	0	0
Liabilities under capital lease	440
Non-current deferred tax liability	1,035	3,040
Pension, other post-retirement and post-employment obligations	1,200	1,182
Other long-term liabilities	0	5
Intercompany loans	(401,482)	(355,003)
Total stockholders’ (deficit) equity	839,350	852,103
Total liabilities and stockholders’ deficit	459,056	519,879
Total Non Guarantors
Current assets:
Cash and cash equivalents	8,927	21,606	28,270	31,738
Accounts receivable, net	60,661	65,764
Intercompany (payable) receivable	(526)	2,414
Inventories	67,016	66,632
Prepaid expenses	6,456	6,845
Other current assets	13,693	11,452
Total current assets	156,227	174,713
Property and equipment, net	231,804	234,620
Investments	31,500	0
Goodwill	44,190	51,238
Intangible assets	1,042	412
Non-current deferred tax asset	10,662	5,045
Other assets	5,445	4,434
Total assets	480,870	470,462
Current liabilities:
Notes payable	244	8,267
Accounts payable	28,936	29,731
Accrued expenses	39,297	43,402
Current maturities of long-term debt	1,462	142
Total current liabilities	69,939	81,542
Long-term debt, net of current maturities	0	0
Liabilities under capital lease	2
Non-current deferred tax liability	9,284	12,983
Pension, other post-retirement and post-employment obligations	57,201	54,472
Other long-term liabilities	9,715	5,459
Intercompany loans	111,586	121,248
Total stockholders’ (deficit) equity	223,143	194,758
Total liabilities and stockholders’ deficit	480,870	470,462
Other Eliminations
Current assets:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Intercompany (payable) receivable	0	0
Inventories	(776)	(779)
Prepaid expenses	0	0
Other current assets	0	0
Total current assets	(776)	(779)
Property and equipment, net	0	0
Investments	(1,043,242)	(985,141)
Goodwill	0	0
Intangible assets	0	0
Non-current deferred tax asset	0	0
Other assets	0	0
Total assets	(1,044,018)	(985,920)
Current liabilities:
Notes payable		0
Accounts payable	0	0
Accrued expenses	0	0
Current maturities of long-term debt	0	0
Total current liabilities	0	0
Long-term debt, net of current maturities	0	0
Liabilities under capital lease	0
Non-current deferred tax liability	0	0
Pension, other post-retirement and post-employment obligations	0	0
Other long-term liabilities	0	0
Intercompany loans	0	0
Total stockholders’ (deficit) equity	(1,044,018)	(985,920)
Total liabilities and stockholders’ deficit	$ (1,044,018)	$ (985,920)