Employee Benefits and Share-Based Compensation - 401(k) Plan (Details) - Other Postretirement Benefit Plan - Omnicell Plan - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution, percent of employee contribution	50.00%
Maximum amount of employer contribution	$ 2,000
401(k) contributions	$ 1,900,000	$ 1,800,000	$ 1,300,000