Condensed Consolidating Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 90,344	$ 101,971	$ 91,034	$ 245,935
Accounts receivable, net	399,341	448,320
Inventories	31,860	41,120
Prepaid expenses and other (including intercompany)	55,080	37,655
Total current assets	576,625	629,066
Property, plant and equipment, net	131,566	148,905
Goodwill	628,886	636,471
Other intangible assets, net	221,403	213,613
Investments	3,391	3,490
Intercompany note receivable (payable)	0	0
Other assets	12,694	12,902
Total assets	1,574,565	1,644,447
Current liabilities:
Current portion, long-term debt	18,750	15,000
Accounts payable and intercompany payable	284,473	334,378
Progress billings	40,552	39,975
Accrued expenses	82,008	98,409
Total current liabilities	425,783	487,762
Long-term debt	572,561	587,560
Deferred income taxes	66,672	67,404
Other non-current liabilities	44,450	52,187
Total liabilities	1,109,466	1,194,913
Stockholders' equity	465,099	449,534
Total liabilities and stockholders' equity	1,574,565	1,644,447
Parent Company
Current assets:
Cash and cash equivalents	58,768	68,887	65,249	211,933
Accounts receivable, net	107,972	123,558
Inventories	24,273	32,159
Prepaid expenses and other (including intercompany)	1,382,334	1,157,263
Total current assets	1,573,347	1,381,867
Property, plant and equipment, net	18,871	24,790
Goodwill	23,699	23,584
Other intangible assets, net	11,540	11,558
Investments	627,723	547,366
Intercompany note receivable (payable)	344,146	359,649
Other assets	8,116	9,710
Total assets	2,607,442	2,358,524
Current liabilities:
Current portion, long-term debt	18,750	15,000
Accounts payable and intercompany payable	1,475,441	1,210,296
Progress billings	16,449	15,952
Accrued expenses	42,259	52,675
Total current liabilities	1,552,899	1,293,923
Long-term debt	572,561	587,560
Deferred income taxes	(3,573)	(2,840)
Other non-current liabilities	20,456	30,347
Total liabilities	2,142,343	1,908,990
Stockholders' equity	465,099	449,534
Total liabilities and stockholders' equity	2,607,442	2,358,524
Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	7,530	7,543	1,759	8,026
Accounts receivable, net	274,327	302,096
Inventories	7,584	8,958
Prepaid expenses and other (including intercompany)	3,214,001	1,993,450
Total current assets	3,503,442	2,312,047
Property, plant and equipment, net	111,655	122,565
Goodwill	598,198	605,898
Other intangible assets, net	209,863	202,055
Investments	15,100	21,385
Intercompany note receivable (payable)	(340,069)	(333,683)
Other assets	4,564	5,271
Total assets	4,102,753	2,935,538
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	3,334,726	2,246,381
Progress billings	11,764	10,358
Accrued expenses	33,059	38,543
Total current liabilities	3,379,549	2,295,282
Long-term debt	0	0
Deferred income taxes	74,242	74,241
Other non-current liabilities	24,363	20,887
Total liabilities	3,478,154	2,390,410
Stockholders' equity	624,599	545,128
Total liabilities and stockholders' equity	4,102,753	2,935,538
Non-Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	24,046	25,541	24,026	25,976
Accounts receivable, net	17,042	22,666
Inventories	3	3
Prepaid expenses and other (including intercompany)	1,309	23,217
Total current assets	42,400	71,427
Property, plant and equipment, net	1,040	1,550
Goodwill	6,989	6,989
Other intangible assets, net	0	0
Investments	0	0
Intercompany note receivable (payable)	(4,077)	(25,966)
Other assets	14	(2,079)
Total assets	46,366	51,921
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	16,870	13,976
Progress billings	12,339	13,665
Accrued expenses	6,690	7,191
Total current liabilities	35,899	34,832
Long-term debt	0	0
Deferred income taxes	(3,997)	(3,997)
Other non-current liabilities	(369)	953
Total liabilities	31,533	31,788
Stockholders' equity	14,833	20,133
Total liabilities and stockholders' equity	46,366	51,921
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)	(4,542,564)	(3,136,275)
Total current assets	(4,542,564)	(3,136,275)
Property, plant and equipment, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Investments	(639,432)	(565,261)
Intercompany note receivable (payable)	0	0
Other assets	0	0
Total assets	(5,181,996)	(3,701,536)
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	(4,542,564)	(3,136,275)
Progress billings	0	0
Accrued expenses	0	0
Total current liabilities	(4,542,564)	(3,136,275)
Long-term debt	0	0
Deferred income taxes	0	0
Other non-current liabilities	0	0
Total liabilities	(4,542,564)	(3,136,275)
Stockholders' equity	(639,432)	(565,261)
Total liabilities and stockholders' equity	$ (5,181,996)	$ (3,701,536)