Condensed Consolidating Statement of Income (Detail) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	$ 565,252	$ 579,950	$ 1,112,231	$ 1,129,952
Cost and expenses:
Cost of sales	418,040	423,765	826,617	827,154
Selling, general and administrative	80,831	92,663	159,258	183,621
Amortization expense	3,155	3,155	6,311	6,311
Total costs and expenses	502,026	519,583	992,186	1,017,086
Gain from litigation settlement, net (Note 6)				490,085
Earnings from operations	63,226	60,367	120,045	602,951
Other expenses and income:
Interest expense	11,726	17,837	21,501	37,993
Interest income	(122)	(248)	(261)	(394)
Loss on extinguishment of debt (Note 3)	2,966	23,873	16,318	23,873
Other income, net	(1,436)	(561)	(2,312)	(2,351)
Total other expenses (income), net	13,134	40,901	35,246	59,121
Earnings (loss) before income taxes	50,092	19,466	84,799	543,830
Income tax (benefit) expense	19,840	8,361	33,136	210,197
Net earnings	30,252	11,105	51,663	333,633
Parent Company
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	200,589	210,345	398,755	404,373
Cost and expenses:
Cost of sales	168,597	164,074	334,934	312,663
Selling, general and administrative	21,461	36,274	45,975	72,194
Amortization expense	5	5	11	11
Total costs and expenses	190,063	200,353	380,920	384,868
Gain from litigation settlement, net (Note 6)				490,085
Earnings from operations	10,526	9,992	17,835	509,590
Other expenses and income:
Interest expense	11,726	17,837	21,501	37,993
Interest income	(96)	(230)	(214)	(373)
Intercompany interest	(3,157)	(16,298)	(14,354)	(33,544)
Loss on extinguishment of debt (Note 3)	2,966	23,873	16,318	23,873
Other income, net	9	280	(218)	(813)
Total other expenses (income), net	11,448	25,462	23,033	27,136
Earnings (loss) before income taxes	(922)	(15,470)	(5,198)	482,454
Income tax (benefit) expense	241	(3,325)	566	188,743
Equity in net earnings of subsidiaries	31,415	23,250	57,427	39,922
Net earnings	30,252	11,105	51,663	333,633
Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	444,629	375,691	873,897	737,009
Cost and expenses:
Cost of sales	286,880	271,879	564,712	537,913
Selling, general and administrative	104,561	52,619	204,939	104,290
Amortization expense	3,150	3,150	6,300	6,300
Total costs and expenses	394,591	327,648	775,951	648,503
Earnings from operations	50,038	48,043	97,946	88,506
Other expenses and income:
Interest income		1		3
Intercompany interest	2,995	16,186	14,192	33,432
Other income, net	(1,481)	(860)	(2,270)	(1,416)
Total other expenses (income), net	1,514	15,327	11,922	32,019
Earnings (loss) before income taxes	48,524	32,716	86,024	56,487
Income tax (benefit) expense	18,844	10,906	31,308	20,178
Equity in net earnings of subsidiaries	1,735	1,440	2,711	3,613
Net earnings	31,415	23,250	57,427	39,922
Non-Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	20,281	19,016	37,650	36,956
Cost and expenses:
Cost of sales	13,973	12,914	26,292	24,964
Selling, general and administrative	3,646	3,770	7,094	7,137
Total costs and expenses	17,619	16,684	33,386	32,101
Earnings from operations	2,662	2,332	4,264	4,855
Other expenses and income:
Interest income	(26)	(19)	(47)	(24)
Intercompany interest	162	112	162	112
Other income, net	36	19	176	(122)
Total other expenses (income), net	172	112	291	(34)
Earnings (loss) before income taxes	2,490	2,220	3,973	4,889
Income tax (benefit) expense	755	780	1,262	1,276
Net earnings	1,735	1,440	2,711	3,613
Consolidating Adjustments
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	(100,247)	(25,102)	(198,071)	(48,386)
Cost and expenses:
Cost of sales	(51,410)	(25,102)	(99,321)	(48,386)
Selling, general and administrative	(48,837)		(98,750)
Total costs and expenses	(100,247)	(25,102)	(198,071)	(48,386)
Other expenses and income:
Equity in net earnings of subsidiaries	(33,150)	(24,690)	(60,138)	(43,535)
Net earnings	$ (33,150)	$ (24,690)	$ (60,138)	$ (43,535)