IDEXX Retirement And Incentive Savings Plan (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
401(k) Plan [Member]
Retirement And Incentive Savings Plan [Line Items]
Employer contributions	$ 7.8	$ 7.1	$ 6.4
European And Canadian Based Defined Contribution Plan [Member]
Retirement And Incentive Savings Plan [Line Items]
Employer contributions	$ 3.1	$ 2.8	$ 2.2