Condensed Consolidating Statement of Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	$ 523,822	$ 528,391	$ 1,582,645	$ 1,640,622
Costs and expenses:
Cost of sales	388,284	395,728	1,180,905	1,222,345
Selling, general and administrative	73,358	80,520	234,498	239,778
Amortization expense	3,245	3,156	9,557	9,467
Goodwill, Impairment Loss	0	0	7,585	0
Total costs and expenses	464,887	479,404	1,432,545	1,471,590
Earnings (loss) from operations	58,935	48,987	150,100	169,032
Other expenses and income:
Interest expense	7,563	8,148	21,372	29,649
Interest income	(46)	(54)	(174)	(315)
Intercompany interest	0	0	0	0
Loss on extinguishment of debt (Note 3)	0	0	0	16,318
Other income, net	249	(3,856)	(525)	(6,168)
Total other expenses (income), net	7,766	4,238	20,673	39,484
Earnings (loss) before income taxes	51,169	44,749	129,427	129,548
Income tax (benefit) expense	14,429	17,255	44,559	50,391
Equity in net earnings (loss) of subsidiaries	0	0	0	0
Net earnings	36,740	27,494	84,868	79,157
Other Comprehensive Income (Loss), Net of Tax	(9)	(3,992)	(435)	(515)
Comprehensive income	36,731	23,502	84,433	78,642
Parent Company
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	172,888	173,543	515,716	572,298
Costs and expenses:
Cost of sales	145,467	148,817	435,750	483,751
Selling, general and administrative	23,033	30,065	76,842	76,040
Amortization expense	6	5	17	16
Goodwill, Impairment Loss			3,985
Total costs and expenses	168,506	178,887	516,594	559,807
Earnings (loss) from operations	4,382	(5,344)	(878)	12,491
Other expenses and income:
Interest expense	7,563	8,148	21,372	29,649
Interest income	(20)	(28)	(80)	(242)
Intercompany interest	(9,062)	(1,179)	(19,817)	(15,533)
Loss on extinguishment of debt (Note 3)				16,318
Other income, net	49	(2,877)	34	(3,095)
Total other expenses (income), net	(1,470)	4,064	1,509	27,097
Earnings (loss) before income taxes	5,852	(9,408)	(2,387)	(14,606)
Income tax (benefit) expense	(3,429)	(10)	(6,016)	556
Equity in net earnings (loss) of subsidiaries	27,459	36,892	81,239	94,319
Net earnings	36,740	27,494	84,868	79,157
Other Comprehensive Income (Loss), Net of Tax	(9)	(3,992)	(435)	(515)
Comprehensive income	36,731	23,502	84,433	78,642
Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	445,063	443,671	1,332,741	1,317,568
Costs and expenses:
Cost of sales	286,533	287,173	864,353	851,885
Selling, general and administrative	101,614	100,223	305,097	305,162
Amortization expense	3,239	3,151	9,540	9,451
Goodwill, Impairment Loss			3,600
Total costs and expenses	391,386	390,547	1,182,590	1,166,498
Earnings (loss) from operations	53,677	53,124	150,151	151,070
Other expenses and income:
Interest expense	0	0	0	0
Interest income	3	0	3	0
Intercompany interest	9,062	1,179	19,770	15,371
Loss on extinguishment of debt (Note 3)				0
Other income, net	197	(972)	(526)	(3,242)
Total other expenses (income), net	9,262	207	19,247	12,129
Earnings (loss) before income taxes	44,415	52,917	130,904	138,941
Income tax (benefit) expense	17,632	16,891	49,540	48,199
Equity in net earnings (loss) of subsidiaries	4,276	866	3,475	3,577
Net earnings	31,059	36,892	84,839	94,319
Other Comprehensive Income (Loss), Net of Tax	197	(1,254)	750	(447)
Comprehensive income	31,256	35,638	85,589	93,872
Non-Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	12,868	17,008	44,754	54,658
Costs and expenses:
Cost of sales	9,093	12,368	34,637	38,660
Selling, general and administrative	2,899	3,433	9,290	10,527
Amortization expense	0	0	0	0
Goodwill, Impairment Loss			0
Total costs and expenses	11,992	15,801	43,927	49,187
Earnings (loss) from operations	876	1,207	827	5,471
Other expenses and income:
Interest expense	0		0	0
Interest income	(29)	(26)	(97)	(73)
Intercompany interest	0	0	47	162
Loss on extinguishment of debt (Note 3)				0
Other income, net	3	(7)	(33)	169
Total other expenses (income), net	(26)	(33)	(83)	258
Earnings (loss) before income taxes	902	1,240	910	5,213
Income tax (benefit) expense	226	374	1,035	1,636
Equity in net earnings (loss) of subsidiaries	0	0	0	0
Net earnings	676	866	(125)	3,577
Other Comprehensive Income (Loss), Net of Tax	197	(1,254)	750	(447)
Comprehensive income	873	(388)	625	3,130
Consolidating Adjustments
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	(106,997)	(105,831)	(310,566)	(303,902)
Costs and expenses:
Cost of sales	(52,809)	(52,630)	(153,835)	(151,951)
Selling, general and administrative	(54,188)	(53,201)	(156,731)	(151,951)
Amortization expense	0	0	0	0
Goodwill, Impairment Loss			0
Total costs and expenses	(106,997)	(105,831)	(310,566)	(303,902)
Earnings (loss) from operations	0	0	0	0
Other expenses and income:
Interest expense	0	0	0	0
Interest income	0	0	0	0
Intercompany interest	0	0	0	0
Loss on extinguishment of debt (Note 3)				0
Other income, net	0	0	0	0
Total other expenses (income), net	0	0	0	0
Earnings (loss) before income taxes	0	0	0	0
Income tax (benefit) expense	0	0	0	0
Equity in net earnings (loss) of subsidiaries	(31,735)	(37,758)	(84,714)	(97,896)
Net earnings	(31,735)	(37,758)	(84,714)	(97,896)
Other Comprehensive Income (Loss), Net of Tax	(394)	2,508	(1,500)	894
Comprehensive income	$ (32,129)	$ (35,250)	$ (86,214)	$ (97,002)