Condensed Consolidating Statement of Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	$ 518,585	$ 546,979
Costs and expenses:
Cost of sales	388,894	408,577
Selling, general and administrative	77,617	78,427
Amortization expense	3,156	3,156
Total costs and expenses	469,667	490,160
Earnings (loss) from operations	48,918	56,819
Other expenses and income:
Interest expense	7,054	9,775
Interest income	(58)	(139)
Intercompany interest	0	0
Loss on extinguishment of debt (Note 3)	0	13,352
Other income, net	(697)	(876)
Total other expenses (income), net	6,299	22,112
Earnings (loss) before income taxes	42,619	34,707
Income tax (benefit) expense	16,198	13,296
Equity in net earnings (loss) of subsidiaries	0	0
Net earnings	26,421	21,411
Other Comprehensive Income (Loss), Net of Tax	(54)	1,357
Comprehensive income	26,367	22,768
Parent Company
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	171,291	198,166
Costs and expenses:
Cost of sales	145,142	166,337
Selling, general and administrative	20,370	24,514
Amortization expense	6	6
Total costs and expenses	165,518	190,857
Earnings (loss) from operations	5,773	7,309
Other expenses and income:
Interest expense	7,054	9,775
Interest income	(22)	(118)
Intercompany interest	(8,967)	(11,197)
Loss on extinguishment of debt (Note 3)		13,352
Other income, net	(144)	(227)
Total other expenses (income), net	(2,079)	11,585
Earnings (loss) before income taxes	7,852	(4,276)
Income tax (benefit) expense	2,418	325
Equity in net earnings (loss) of subsidiaries	20,987	26,012
Net earnings	26,421	21,411
Other Comprehensive Income (Loss), Net of Tax	(54)	1,357
Comprehensive income	26,367	22,768
Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	430,014	429,268
Costs and expenses:
Cost of sales	283,095	277,832
Selling, general and administrative	102,794	100,378
Amortization expense	3,150	3,150
Total costs and expenses	389,039	381,360
Earnings (loss) from operations	40,975	47,908
Other expenses and income:
Interest expense	0	0
Interest income	0	0
Intercompany interest	8,967	11,197
Loss on extinguishment of debt (Note 3)		0
Other income, net	(616)	(789)
Total other expenses (income), net	8,351	10,408
Earnings (loss) before income taxes	32,624	37,500
Income tax (benefit) expense	13,360	12,464
Equity in net earnings (loss) of subsidiaries	1,723	976
Net earnings	20,987	26,012
Other Comprehensive Income (Loss), Net of Tax	350	865
Comprehensive income	21,337	26,877
Non-Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	17,382	17,369
Costs and expenses:
Cost of sales	11,928	12,319
Selling, general and administrative	3,284	3,448
Amortization expense	0	0
Total costs and expenses	15,212	15,767
Earnings (loss) from operations	2,170	1,602
Other expenses and income:
Interest expense	0	0
Interest income	(36)	(21)
Intercompany interest	0	0
Loss on extinguishment of debt (Note 3)		0
Other income, net	63	140
Total other expenses (income), net	27	119
Earnings (loss) before income taxes	2,143	1,483
Income tax (benefit) expense	420	507
Equity in net earnings (loss) of subsidiaries	0	0
Net earnings	1,723	976
Other Comprehensive Income (Loss), Net of Tax	350	865
Comprehensive income	2,073	1,841
Consolidating Adjustments
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	(100,102)	(97,824)
Costs and expenses:
Cost of sales	(51,271)	(47,911)
Selling, general and administrative	(48,831)	(49,913)
Amortization expense	0	0
Total costs and expenses	(100,102)	(97,824)
Earnings (loss) from operations	0	0
Other expenses and income:
Interest expense	0	0
Interest income	0	0
Intercompany interest	0	0
Loss on extinguishment of debt (Note 3)		0
Other income, net	0	0
Total other expenses (income), net	0	0
Earnings (loss) before income taxes	0	0
Income tax (benefit) expense	0	0
Equity in net earnings (loss) of subsidiaries	(22,710)	(26,988)
Net earnings	(22,710)	(26,988)
Other Comprehensive Income (Loss), Net of Tax	(700)	(1,730)
Comprehensive income	$ (23,410)	$ (28,718)