Acquisitions Acquisitions - LifeWatch AG - Pro Forma Financial Information (Details) - LifeWatch $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares
Business Acquisition
Revenue | $	$ 349,900
Net Income/(loss) | $	$ (1,800)
Basic (in dollars per share) | $ / shares	$ (0.05)
Diluted (in dollars per share) | $ / shares	$ (0.05)
Basic (in shares) | shares	34,022
Diluted (in shares) | shares	34,022