Condensed Consolidating Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 74,985	$ 94,711	$ 90,344	$ 101,971
Accounts receivable, net	408,322	426,899
Inventories	36,705	43,253
Prepaid expenses and other (including intercompany)	49,006	36,589
Total current assets	569,018	601,452
Property, plant and equipment, net	109,826	125,832
Goodwill	632,438	632,438
Other intangible assets, net	203,984	215,171
Investments	4,003	2,431
Intercompany note receivable (payable)	0	0
Other assets	9,433	11,711
Total assets	1,528,702	1,589,035
Current liabilities:
Current portion, long-term debt	33,750	22,500
Accounts payable and intercompany payable	264,144	281,320
Progress billings	38,084	39,595
Accrued expenses	96,342	107,467
Total current liabilities	432,320	450,882
Long-term debt	502,650	565,061
Deferred income taxes	57,968	57,258
Other non-current liabilities	38,002	42,271
Total liabilities	1,030,940	1,115,472
Stockholders' equity	497,762	473,563
Total liabilities and stockholders' equity	1,528,702	1,589,035
Parent Company
Current assets:
Cash and cash equivalents	41,025	62,836	58,768	68,887
Accounts receivable, net	100,152	116,821
Inventories	27,249	35,421
Prepaid expenses and other (including intercompany)	1,971,516	1,520,526
Total current assets	2,139,942	1,735,604
Property, plant and equipment, net	19,014	19,159
Goodwill	23,700	23,699
Other intangible assets, net	11,517	11,534
Investments	717,055	645,411
Intercompany note receivable (payable)	326,622	364,921
Other assets	6,392	7,543
Total assets	3,244,242	2,807,871
Current liabilities:
Current portion, long-term debt	33,750	22,500
Accounts payable and intercompany payable	2,132,824	1,653,928
Progress billings	13,128	16,459
Accrued expenses	52,508	61,741
Total current liabilities	2,232,210	1,754,628
Long-term debt	502,650	565,061
Deferred income taxes	(3,421)	(4,131)
Other non-current liabilities	15,041	18,750
Total liabilities	2,746,480	2,334,308
Stockholders' equity	497,762	473,563
Total liabilities and stockholders' equity	3,244,242	2,807,871
Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	14,329	10,745	7,530	7,543
Accounts receivable, net	282,914	287,230
Inventories	9,453	7,829
Prepaid expenses and other (including intercompany)	5,232,562	3,706,682
Total current assets	5,539,258	4,012,486
Property, plant and equipment, net	89,854	105,667
Goodwill	601,750	601,750
Other intangible assets, net	192,467	203,637
Investments	19,912	15,375
Intercompany note receivable (payable)	(314,292)	(360,830)
Other assets	3,029	4,157
Total assets	6,131,978	4,582,242
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	5,271,181	3,804,209
Progress billings	15,065	7,758
Accrued expenses	35,842	38,878
Total current liabilities	5,322,088	3,850,845
Long-term debt	0	0
Deferred income taxes	65,398	65,398
Other non-current liabilities	31,020	22,722
Total liabilities	5,418,506	3,938,965
Stockholders' equity	713,472	643,277
Total liabilities and stockholders' equity	6,131,978	4,582,242
Non-Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	19,631	21,130	24,046	25,541
Accounts receivable, net	25,256	22,848
Inventories	3	3
Prepaid expenses and other (including intercompany)	3,085	1,998
Total current assets	47,975	45,979
Property, plant and equipment, net	958	1,006
Goodwill	6,988	6,989
Other intangible assets, net	0	0
Investments	0	0
Intercompany note receivable (payable)	(12,330)	(4,091)
Other assets	12	11
Total assets	43,603	49,894
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	18,296	15,800
Progress billings	9,891	15,378
Accrued expenses	7,992	6,848
Total current liabilities	36,179	38,026
Long-term debt	0	0
Deferred income taxes	(4,009)	(4,009)
Other non-current liabilities	(8,059)	799
Total liabilities	24,111	34,816
Stockholders' equity	19,492	15,078
Total liabilities and stockholders' equity	43,603	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)	(7,158,157)	(5,192,617)
Total current assets	(7,158,157)	(5,192,617)
Property, plant and equipment, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Investments	(732,964)	(658,355)
Intercompany note receivable (payable)	0	0
Other assets	0	0
Total assets	(7,891,121)	(5,850,972)
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	(7,158,157)	(5,192,617)
Progress billings	0	0
Accrued expenses	0	0
Total current liabilities	(7,158,157)	(5,192,617)
Long-term debt	0	0
Deferred income taxes	0	0
Other non-current liabilities	0	0
Total liabilities	(7,158,157)	(5,192,617)
Stockholders' equity	(732,964)	(658,355)
Total liabilities and stockholders' equity	$ (7,891,121)	$ (5,850,972)