Acquisitions - Consideration (Details) - USD ($) $ in Thousands			3 Months Ended
	Oct. 05, 2015	Mar. 27, 2015	Dec. 31, 2015	Mar. 31, 2015
DigiCore/Ctrack
Business Acquisition [Line Items]
Cash payments			$ 79,365
Equity consideration			623
Total purchase price	$ 80,000		$ 79,988
FW
Business Acquisition [Line Items]
Cash payments		$ 9,300		$ 9,268
Equity consideration		15,000		15,000
Other assumed liabilities		500		509
Total purchase price		$ 24,800		$ 24,777