Condensed Consolidating Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 88,645	$ 94,711	$ 75,237	$ 75,237	$ 101,971
Accounts receivable, net	388,025	426,899
Inventories	36,052	43,253
Prepaid expenses and other (including intercompany)	55,021	36,589
Total current assets	567,743	601,452
Property, plant and equipment, net	112,846	125,832
Goodwill	632,438	632,438
Other intangible assets, net	207,713	215,171
Investments	3,280	2,431
Intercompany note receivable (payable)	0	0
Other assets	10,388	11,711
Total assets	1,534,408	1,589,035
Current liabilities:
Current portion, long-term debt	30,000	22,500
Accounts payable and intercompany payable	268,009	281,320
Progress billings	37,259	39,595
Accrued expenses	97,431	107,467
Total current liabilities	432,699	450,882
Long-term debt	535,004	565,061
Deferred income taxes	57,842	57,258
Other non-current liabilities	40,130	42,271
Total liabilities	1,065,675	1,115,472
Stockholders' equity	468,733	473,563
Total liabilities and stockholders' equity	1,534,408	1,589,035
Parent Company
Current assets:
Cash and cash equivalents	58,374	62,836		54,185	68,887
Accounts receivable, net	84,814	116,821
Inventories	28,418	35,421
Prepaid expenses and other (including intercompany)	1,845,826	1,520,526
Total current assets	2,017,432	1,735,604
Property, plant and equipment, net	20,431	19,159
Goodwill	23,700	23,699
Other intangible assets, net	11,523	11,534
Investments	693,702	645,411
Intercompany note receivable (payable)	316,406	364,921
Other assets	6,988	7,543
Total assets	3,090,182	2,807,871
Current liabilities:
Current portion, long-term debt	30,000	22,500
Accounts payable and intercompany payable	1,973,111	1,653,928
Progress billings	12,309	16,459
Accrued expenses	58,968	61,741
Total current liabilities	2,074,388	1,754,628
Long-term debt	535,004	565,061
Deferred income taxes	(3,547)	(4,131)
Other non-current liabilities	15,604	18,750
Total liabilities	2,621,449	2,334,308
Stockholders' equity	468,733	473,563
Total liabilities and stockholders' equity	3,090,182	2,807,871
Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	14,097	10,745		4,379	7,543
Accounts receivable, net	277,442	287,230
Inventories	7,631	7,829
Prepaid expenses and other (including intercompany)	4,736,260	3,706,682
Total current assets	5,035,430	4,012,486
Property, plant and equipment, net	91,385	105,667
Goodwill	601,750	601,750
Other intangible assets, net	196,190	203,637
Investments	18,852	15,375
Intercompany note receivable (payable)	(305,009)	(360,830)
Other assets	3,388	4,157
Total assets	5,641,986	4,582,242
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	4,811,153	3,804,209
Progress billings	11,899	7,758
Accrued expenses	31,501	38,878
Total current liabilities	4,854,553	3,850,845
Long-term debt	0	0
Deferred income taxes	65,398	65,398
Other non-current liabilities	31,321	22,722
Total liabilities	4,951,272	3,938,965
Stockholders' equity	690,714	643,277
Total liabilities and stockholders' equity	5,641,986	4,582,242
Non-Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	16,174	21,130		16,673	25,541
Accounts receivable, net	25,769	22,848
Inventories	3	3
Prepaid expenses and other (including intercompany)	2,365	1,998
Total current assets	44,311	45,979
Property, plant and equipment, net	1,030	1,006
Goodwill	6,988	6,989
Other intangible assets, net	0	0
Investments	0	0
Intercompany note receivable (payable)	(11,397)	(4,091)
Other assets	12	11
Total assets	40,944	49,894
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	13,175	15,800
Progress billings	13,051	15,378
Accrued expenses	6,962	6,848
Total current liabilities	33,188	38,026
Long-term debt	0	0
Deferred income taxes	(4,009)	(4,009)
Other non-current liabilities	(6,795)	799
Total liabilities	22,384	34,816
Stockholders' equity	18,560	15,078
Total liabilities and stockholders' equity	40,944	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)	(6,529,430)	(5,192,617)
Total current assets	(6,529,430)	(5,192,617)
Property, plant and equipment, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Investments	(709,274)	(658,355)
Intercompany note receivable (payable)	0	0
Other assets	0	0
Total assets	(7,238,704)	(5,850,972)
Current liabilities:
Current portion, long-term debt	0	0
Accounts payable and intercompany payable	(6,529,430)	(5,192,617)
Progress billings	0	0
Accrued expenses	0	0
Total current liabilities	(6,529,430)	(5,192,617)
Long-term debt	0	0
Deferred income taxes	0	0
Other non-current liabilities	0	0
Total liabilities	(6,529,430)	(5,192,617)
Stockholders' equity	(709,274)	(658,355)
Total liabilities and stockholders' equity	$ (7,238,704)	$ (5,850,972)