Intangible Assets Intangible (Details textual ) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Marine & Remote Sensing Solutions [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset	$ 375
DigitalOptics Charlotte [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset	2,520
Lorex Technology Inc. [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset	15,100
Traficon International NV
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset	$ 20,102