Allowance for Uncollectible Accounts (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Allowance for Uncollectible Accounts [Abstract]
Balance at December 31, 2013	$ 2,234
Provision	5,196	[1]
Write-offs	(1,459)
Balance at June 30, 2014	$ 5,971

[1] Reflects charges associated with the provision for uncertain collection of a portion of our existing trade receivables related to our Robotics segment.