Condensed Consolidating Statement of Income (Detail) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	$ 528,391	$ 572,406	$ 1,640,622	$ 1,702,358
Cost and expenses:
Cost of sales	395,728	421,510	1,222,345	1,248,664
Selling, general and administrative	80,520	91,800	239,778	275,421
Amortization expense	3,156	3,156	9,467	9,467
Total costs and expenses	479,404	516,466	1,471,590	1,533,552
Gain from litigation settlement, net (Note 6)				490,085
Earnings (loss) from operations	48,987	55,940	169,032	658,891
Other expenses and income:
Interest expense	8,148	14,091	29,649	52,084
Interest income	(54)	(116)	(315)	(510)
Loss on extinguishment of debt (Note 3)			16,318	23,873
Other income, net	(3,856)	(2,120)	(6,168)	(4,471)
Total other expenses (income), net	4,238	11,855	39,484	70,976
Earnings (loss) before income taxes	44,749	44,085	129,548	587,915
Income tax (benefit) expense	17,255	17,106	50,391	227,303
Net earnings	27,494	26,979	79,157	360,612
Parent Company
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	173,543	273,629	572,298	678,002
Cost and expenses:
Cost of sales	148,817	225,822	483,751	538,485
Selling, general and administrative	30,065	38,596	76,040	110,790
Amortization expense	5	6	16	17
Total costs and expenses	178,887	264,424	559,807	649,292
Gain from litigation settlement, net (Note 6)				490,085
Earnings (loss) from operations	(5,344)	9,205	12,491	518,795
Other expenses and income:
Interest expense	8,148	14,091	29,649	52,084
Interest income	(28)	(98)	(242)	(471)
Intercompany interest	(1,179)	(16,355)	(15,533)	(49,899)
Loss on extinguishment of debt (Note 3)			16,318	23,873
Other income, net	(2,877)	(1,240)	(3,095)	(2,053)
Total other expenses (income), net	4,064	(3,602)	27,097	23,534
Earnings (loss) before income taxes	(9,408)	12,807	(14,606)	495,261
Income tax (benefit) expense	(10)	6,133	556	194,876
Equity in net earnings (loss) of subsidiaries	36,892	20,305	94,319	60,227
Net earnings	27,494	26,979	79,157	360,612
Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	443,671	421,906	1,317,568	1,158,915
Cost and expenses:
Cost of sales	287,173	275,137	851,885	813,050
Selling, general and administrative	100,223	96,825	305,162	201,115
Amortization expense	3,151	3,151	9,451	9,451
Total costs and expenses	390,547	375,113	1,166,498	1,023,616
Earnings (loss) from operations	53,124	46,793	151,070	135,299
Other expenses and income:
Interest income				3
Intercompany interest	1,179	16,356	15,371	49,788
Other income, net	(972)	(799)	(3,242)	(2,215)
Total other expenses (income), net	207	15,557	12,129	47,576
Earnings (loss) before income taxes	52,917	31,236	138,941	87,723
Income tax (benefit) expense	16,891	10,788	48,199	30,966
Equity in net earnings (loss) of subsidiaries	866	(143)	3,577	3,470
Net earnings	36,892	20,305	94,319	60,227
Non-Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	17,008	15,003	54,658	51,959
Cost and expenses:
Cost of sales	12,368	11,231	38,660	36,195
Selling, general and administrative	3,433	3,830	10,527	10,967
Total costs and expenses	15,801	15,061	49,187	47,162
Earnings (loss) from operations	1,207	(58)	5,471	4,797
Other expenses and income:
Interest income	(26)	(18)	(73)	(42)
Intercompany interest		(1)	162	111
Other income, net	(7)	(81)	169	(203)
Total other expenses (income), net	(33)	(100)	258	(134)
Earnings (loss) before income taxes	1,240	42	5,213	4,931
Income tax (benefit) expense	374	185	1,636	1,461
Net earnings	866	(143)	3,577	3,470
Consolidating Adjustments
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	(105,831)	(138,132)	(303,902)	(186,518)
Cost and expenses:
Cost of sales	(52,630)	(90,680)	(151,951)	(139,066)
Selling, general and administrative	(53,201)	(47,451)	(151,951)	(47,451)
Amortization expense		(1)		(1)
Total costs and expenses	(105,831)	(138,132)	(303,902)	(186,518)
Other expenses and income:
Equity in net earnings (loss) of subsidiaries	(37,758)	(20,162)	(97,896)	(63,697)
Net earnings	$ (37,758)	$ (20,162)	$ (97,896)	$ (63,697)