AMORTIZATION OF INTANGIBLE ASSETS Values Assigned to Intangible Assets (Other Than Goodwill) for Acquisitions (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	$ 95,758	$ 61,494
Accumulated Amortization	41,959	22,492
Net Book Value	53,799	39,002
S & H | Contracts - Fixed Price Level of Effort
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	1,606	1,606
Accumulated Amortization	1,205	972
Net Book Value	401	634
ICCI | Contracts - Fixed Price Level of Effort
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	1,181	1,181
Accumulated Amortization	1,026	802
Net Book Value	155	379
ICCI | Contracts - T&M and IDIQ
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	3,018	3,018
Accumulated Amortization	2,982	2,886
Net Book Value	36	132
ESD | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	1,207	1,207
Accumulated Amortization	831	590
Net Book Value	376	617
LEDS | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value		1,019
Accumulated Amortization		856
Net Book Value		163
Recon | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value		925
Accumulated Amortization		722
Net Book Value		203
TAGG | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	10,457	10,457
Accumulated Amortization	9,949	6,463
Net Book Value	508	3,994
IIT | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	1,615	1,615
Accumulated Amortization	1,503	964
Net Book Value	112	651
IIT | Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	182	182
Accumulated Amortization	169	109
Net Book Value	13	73
Sycamore | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	5,898	5,898
Accumulated Amortization	4,096	2,130
Net Book Value	1,802	3,768
Everest | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	4,690	4,690
Accumulated Amortization	1,954	1,016
Net Book Value	2,736	3,674
JKA | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	2,680	2,680
Accumulated Amortization	1,563	670
Net Book Value	1,117	2,010
FASI | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	2,775	2,775
Accumulated Amortization	1,156	462
Net Book Value	1,619	2,313
FLD | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	2,234	2,234
Accumulated Amortization	1,582	465
Net Book Value	652	1,769
FLD | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	17,549	17,549
Accumulated Amortization	10,287	3,026
Net Book Value	7,262	14,523
FLD | Technology Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	1,958	1,958
Accumulated Amortization	1,148	338
Net Book Value	810	1,620
TI | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	2,500	2,500
Accumulated Amortization	521	21
Net Book Value	1,979	2,479
Poole | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	20,914
Accumulated Amortization	1,046
Net Book Value	19,868
Poole | Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	795
Accumulated Amortization	159
Net Book Value	636
Sensage | Marketing
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	249
Accumulated Amortization	50
Net Book Value	199
Sensage | Intellectual Property
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	4,567
Accumulated Amortization	381
Net Book Value	4,186
Sensage | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	3,682
Accumulated Amortization	184
Net Book Value	3,498
Rsignia, Inc. | Intellectual Property
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	5,001
Accumulated Amortization	139
Net Book Value	4,862
Dilijent | Intellectual Property
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Book Value	1,000
Accumulated Amortization	28
Net Book Value	$ 972