Condensed Consolidating Statement of Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	$ 540,238	$ 565,252	$ 1,058,823	$ 1,112,231
Costs and expenses:
Cost of sales	403,727	418,040	792,621	826,617
Selling, general and administrative	83,523	80,831	161,140	159,258
Amortization expense	3,156	3,155	6,312	6,311
Goodwill, Impairment Loss	7,585	0	7,585	0
Total costs and expenses	497,991	502,026	967,658	992,186
Earnings (loss) from operations	42,247	63,226	91,165	120,045
Other expenses and income:
Interest expense	6,755	11,726	13,809	21,501
Interest income	(70)	(122)	(128)	(261)
Intercompany interest	0	0	0	0
Loss on extinguishment of debt (Note 3)	0	2,966	0	16,318
Other income, net	(77)	(1,436)	(774)	(2,312)
Total other expenses (income), net	6,608	13,134	12,907	35,246
Earnings (loss) before income taxes	35,639	50,092	78,258	84,799
Income tax (benefit) expense	13,932	19,840	30,130	33,136
Equity in net earnings (loss) of subsidiaries	0	0	0	0
Net earnings	21,707	30,252	48,128	51,663
Other Comprehensive Income (Loss), Net of Tax	(372)	2,120	(426)	3,477
Comprehensive income	21,335	32,372	47,702	55,140
Parent Company
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	171,537	200,589	342,828	398,755
Costs and expenses:
Cost of sales	145,141	168,597	290,283	334,934
Selling, general and administrative	33,439	21,461	53,809	45,975
Amortization expense	5	5	11	11
Goodwill, Impairment Loss	3,985		3,985
Total costs and expenses	182,570	190,063	348,088	380,920
Earnings (loss) from operations	(11,033)	10,526	(5,260)	17,835
Other expenses and income:
Interest expense	6,755	11,726	13,809	21,501
Interest income	(38)	(96)	(60)	(214)
Intercompany interest	(1,788)	(3,157)	(10,755)	(14,354)
Loss on extinguishment of debt (Note 3)		2,966		16,318
Other income, net	129	9	(15)	(218)
Total other expenses (income), net	5,058	11,448	2,979	23,033
Earnings (loss) before income taxes	(16,091)	(922)	(8,239)	(5,198)
Income tax (benefit) expense	(5,005)	241	(2,587)	566
Equity in net earnings (loss) of subsidiaries	32,793	31,415	53,780	57,427
Net earnings	21,707	30,252	48,128	51,663
Other Comprehensive Income (Loss), Net of Tax	(372)	2,120	(426)	3,477
Comprehensive income	21,335	32,372	47,702	55,140
Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	457,664	444,629	887,678	873,897
Costs and expenses:
Cost of sales	294,725	286,880	577,820	564,712
Selling, general and administrative	100,689	104,561	203,483	204,939
Amortization expense	3,151	3,150	6,301	6,300
Goodwill, Impairment Loss	3,600		3,600
Total costs and expenses	402,165	394,591	791,204	775,951
Earnings (loss) from operations	55,499	50,038	96,474	97,946
Other expenses and income:
Interest expense	0	0	0	0
Interest income	0	0	0	0
Intercompany interest	1,741	2,995	10,708	14,192
Loss on extinguishment of debt (Note 3)		0		0
Other income, net	(107)	(1,481)	(723)	(2,270)
Total other expenses (income), net	1,634	1,514	9,985	11,922
Earnings (loss) before income taxes	53,865	48,524	86,489	86,024
Income tax (benefit) expense	18,548	18,844	31,908	31,308
Equity in net earnings (loss) of subsidiaries	(2,524)	1,735	(801)	2,711
Net earnings	32,793	31,415	53,780	57,427
Other Comprehensive Income (Loss), Net of Tax	203	(58)	553	807
Comprehensive income	32,996	31,357	54,333	58,234
Non-Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	14,504	20,281	31,886	37,650
Costs and expenses:
Cost of sales	13,616	13,973	25,544	26,292
Selling, general and administrative	3,107	3,646	6,391	7,094
Amortization expense	0	0	0	0
Goodwill, Impairment Loss	0		0
Total costs and expenses	16,723	17,619	31,935	33,386
Earnings (loss) from operations	(2,219)	2,662	(49)	4,264
Other expenses and income:
Interest expense	0	0	0	0
Interest income	(32)	(26)	(68)	(47)
Intercompany interest	47	162	47	162
Loss on extinguishment of debt (Note 3)		0		0
Other income, net	(99)	36	(36)	176
Total other expenses (income), net	(84)	172	(57)	291
Earnings (loss) before income taxes	(2,135)	2,490	8	3,973
Income tax (benefit) expense	389	755	809	1,262
Equity in net earnings (loss) of subsidiaries	0	0	0	0
Net earnings	(2,524)	1,735	(801)	2,711
Other Comprehensive Income (Loss), Net of Tax	203	(58)	553	807
Comprehensive income	(2,321)	1,677	(248)	3,518
Consolidating Adjustments
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Revenues	(103,467)	(100,247)	(203,569)	(198,071)
Costs and expenses:
Cost of sales	(49,755)	(51,410)	(101,026)	(99,321)
Selling, general and administrative	(53,712)	(48,837)	(102,543)	(98,750)
Amortization expense	0	0	0	0
Goodwill, Impairment Loss	0		0
Total costs and expenses	(103,467)	(100,247)	(203,569)	(198,071)
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		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	(30,269)	(33,150)	(52,979)	(60,138)
Net earnings	(30,269)	(33,150)	(52,979)	(60,138)
Other Comprehensive Income (Loss), Net of Tax	(406)	116	(1,106)	(1,614)
Comprehensive income	$ (30,675)	$ (33,034)	$ (54,085)	$ (61,752)