Condensed Consolidating Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 97,204	$ 94,711	$ 107,199	$ 101,971
Accounts receivable, net	416,789	426,899
Inventories	39,075	43,253
Prepaid expenses and other (including intercompany)	30,594	36,589
Total current assets	583,662	601,452
Property, plant and equipment, net	113,602	125,832
Goodwill	632,438	632,438
Other intangible assets, net	211,442	215,171
Investments	2,726	2,431
Intercompany note receivable (payable)	0	0
Other assets	10,688	11,711
Total assets	1,554,558	1,589,035
Current liabilities:
Current portion, long-term debt	26,250	22,500
Accounts payable and intercompany payable	276,565	281,320
Progress billings	36,319	39,595
Accrued expenses	79,161	107,467
Total current liabilities	418,295	450,882
Long-term debt	557,561	565,061
Deferred income taxes	57,624	57,258
Other non-current liabilities	40,701	42,271
Total liabilities	1,074,181	1,115,472
Stockholders' equity	480,377	473,563
Total liabilities and stockholders' equity	1,554,558	1,589,035
Parent Company
Current assets:
Cash and cash equivalents	66,820	62,836	77,346	68,887
Accounts receivable, net	105,193	116,821
Inventories	31,976	35,421
Prepaid expenses and other (including intercompany)	1,676,941	1,520,526
Total current assets	1,880,930	1,735,604
Property, plant and equipment, net	22,775	19,159
Goodwill	23,699	23,699
Other intangible assets, net	11,529	11,534
Investments	664,519	645,411
Intercompany note receivable (payable)	328,973	364,921
Other assets	7,420	7,543
Total assets	2,939,845	2,807,871
Current liabilities:
Current portion, long-term debt	26,250	22,500
Accounts payable and intercompany payable	1,799,764	1,653,928
Progress billings	18,145	16,459
Accrued expenses	45,067	61,741
Total current liabilities	1,889,226	1,754,628
Long-term debt	557,561	565,061
Deferred income taxes	(3,765)	(4,131)
Other non-current liabilities	16,446	18,750
Total liabilities	2,459,468	2,334,308
Stockholders' equity	480,377	473,563
Total liabilities and stockholders' equity	2,939,845	2,807,871
Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	13,699	10,745	5,936	7,543
Accounts receivable, net	288,152	287,230
Inventories	7,096	7,829
Prepaid expenses and other (including intercompany)	4,214,870	3,706,682
Total current assets	4,523,817	4,012,486
Property, plant and equipment, net	89,721	105,667
Goodwill	601,750	601,750
Other intangible assets, net	199,913	203,637
Investments	17,471	15,375
Intercompany note receivable (payable)	(312,717)	(360,830)
Other assets	3,256	4,157
Total assets	5,123,211	4,582,242
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	4,325,807	3,804,209
Progress billings	6,934	7,758
Accrued expenses	27,524	38,878
Total current liabilities	4,360,265	3,850,845
Long-term debt	0	0
Deferred income taxes	65,398	65,398
Other non-current liabilities	35,466	22,722
Total liabilities	4,461,129	3,938,965
Stockholders' equity	662,082	643,277
Total liabilities and stockholders' equity	5,123,211	4,582,242
Non-Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	16,685	21,130	23,917	25,541
Accounts receivable, net	23,444	22,848
Inventories	3	3
Prepaid expenses and other (including intercompany)	1,994	1,998
Total current assets	42,126	45,979
Property, plant and equipment, net	1,106	1,006
Goodwill	6,989	6,989
Other intangible assets, net	0	0
Investments	0	0
Intercompany note receivable (payable)	(16,256)	(4,091)
Other assets	12	11
Total assets	33,977	49,894
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	14,205	15,800
Progress billings	11,240	15,378
Accrued expenses	6,570	6,848
Total current liabilities	32,015	38,026
Long-term debt	0	0
Deferred income taxes	(4,009)	(4,009)
Other non-current liabilities	(11,211)	799
Total liabilities	16,795	34,816
Stockholders' equity	17,182	15,078
Total liabilities and stockholders' equity	33,977	49,894
Consolidating Adjustments
Current assets:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories	0	0
Prepaid expenses and other (including intercompany)	(5,863,211)	(5,192,617)
Total current assets	(5,863,211)	(5,192,617)
Property, plant and equipment, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Investments	(679,264)	(658,355)
Intercompany note receivable (payable)	0	0
Other assets	0	0
Total assets	(6,542,475)	(5,850,972)
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	(5,863,211)	(5,192,617)
Progress billings	0	0
Accrued expenses	0	0
Total current liabilities	(5,863,211)	(5,192,617)
Long-term debt	0	0
Deferred income taxes	0	0
Other non-current liabilities	0	0
Total liabilities	(5,863,211)	(5,192,617)
Stockholders' equity	(679,264)	(658,355)
Total liabilities and stockholders' equity	$ (6,542,475)	$ (5,850,972)