CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 214,054	$ 193,965
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	4,258	3,277
Reclassification adjustment for benefit plans included in net income, net of tax of $20 in 2023 and $— in 2022	119	0
Unrealized gain (loss) on Euro-denominated notes, net of tax expense (benefit) of $(465) in 2023 and $439 in 2022	(1,490)	1,409
Unrealized gain (loss) on investments, net of tax expense (benefit) of $2 in 2023 and $(5) in 2022	6	(17)
Unrealized gain (loss) on derivative instruments:
Unrealized gain (loss) on foreign currency exchange contracts, net of tax expense (benefit) of $(26) in 2023 and $1,436 in 2022	(209)	2,097
Unrealized gain (loss) on cross currency swaps, net of tax expense (benefit) of $(387) in 2023 and $311 in 2022	(1,240)	996
Unrealized (loss) on interest rate swap, net of tax (benefit) of $(14) in 2023 and $— in 2022	(45)	0
Reclassification adjustments for (gain) included in net income, net of tax benefit (expense) of $(117) in 2023 and $(610) in 2022	(218)	(1,626)
Unrealized gain (loss) on derivative instruments	(1,712)	1,467
Other comprehensive income, net of tax	1,181	6,136
Comprehensive income attributable to IDEXX Laboratories, Inc.	$ 215,235	$ 200,101