Goodwill and Intangible Assets - Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Net balance as of December 31,			$ 122,720	$ 111,343
Additions			26,197	12,112
Adjustments			(1,011)	(735)
Net balance as of December 31,	$ 26,197	$ 122,720	147,906	122,720
Surgichem
Goodwill [Roll Forward]
Surgichem Acquisition, adjustment to purchase price		100
Mach4
Goodwill [Roll Forward]
Surgichem Acquisition, adjustment to purchase price	$ 100
Automation and Analytics
Goodwill [Roll Forward]
Net balance as of December 31,			28,543	28,543
Additions			26,197	0
Adjustments			(424)	0
Net balance as of December 31,		28,543	54,316	28,543
Medication Adherence
Goodwill [Roll Forward]
Net balance as of December 31,			94,177	82,800
Additions			0	12,112
Adjustments			(587)	(735)
Net balance as of December 31,		$ 94,177	$ 93,590	$ 94,177