Annual report pursuant to Section 13 and 15(d)

Fair Value - Additional Information (Detail)

v2.4.0.8
Fair Value - Additional Information (Detail) (USD $)
12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Jul. 30, 2012
Max-Viz, Inc. [Member]
Oct. 01, 2013
AeroSat [Member]
Dec. 31, 2011
Trade Names [Member]
Dec. 31, 2013
Level 3 [Member]
Max-Viz, Inc. [Member]
Dec. 31, 2013
Level 3 [Member]
Ballard [Member]
Dec. 31, 2013
Level 3 [Member]
AeroSat [Member]
Dec. 31, 2013
Level 3 [Member]
Test Systems [Member]
Dec. 31, 2013
Maximum [Member]
Level 3 [Member]
Max-Viz, Inc. [Member]
Dec. 31, 2013
Maximum [Member]
Level 3 [Member]
Ballard [Member]
Dec. 31, 2013
Maximum [Member]
Level 3 [Member]
AeroSat [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                            
Revenue growth target period         3 years     3 years 5 years 2 years        
Contingent consideration on fair value liabilities           $ 5,000,000           $ 8,000,000 $ 5,500,000 $ 53,000,000
Unamortized trade names 500,000                   400,000      
Term of amortization 13 years                   10 years      
Total amortized intangible assets                     3,900,000      
Change in fair value of goodwill and intangible assets                     0      
Goodwill impairment charge 0 0 2,400,000 0                    
Determined fair value     400,000                      
Impairment charge of indefinite-lived intangible $ 0 $ 0         $ 100,000