CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 224,236	$ 131,979	$ 438,290	$ 325,944
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	1,752	(31,081)	6,010	(27,804)
Benefit plans, net of tax expense of $0 and $0 in 2023 and $(991) and $(991) in 2022	0	(5,056)	0	(5,056)
Reclassification adjustment for benefit plans included in net income, net of tax of $34 and $54 in 2023 and $51 and $51 in 2022	178	260	297	260
Unrealized gain (loss) on Euro-denominated notes, net of tax expense (benefit) of $(110) and $(575) in 2023 and $1,286 and $1,725 in 2022	(353)	4,124	(1,843)	5,533
Unrealized gain (loss) on investments, net of tax expense (benefit) of $0 and $2 in 2023 and $(7) and $(12) in 2022	1	(25)	7	(42)
Unrealized gain (loss) on derivative instruments:
Unrealized gain (loss) on foreign currency exchange contracts, net of tax expense (benefit) of $46 and $20 in 2023 and $4,298 and 5,735 in 2022	(131)	11,343	(340)	13,440
Unrealized gain (loss) on cross currency swaps, net of tax expense (benefit) of $(553) and $(940) in 2023 and $1,335 and $1,646 in 2022	(1,776)	4,282	(3,016)	5,278
Unrealized gain (loss) on interest rate swap, net of tax expense (benefit) of $1,107 and $1,093 in 2023 and $0 and $0 in 2022	3,550	0	3,505	0
Reclassification adjustments for (gain) loss included in net income, net of tax (expense) benefit of $(127) and $(244) in 2023 and $(1,577) and $(2,187) in 2022	(271)	(4,204)	(489)	(5,830)
Unrealized gain (loss) on derivative instruments	1,372	11,421	(340)	12,888
Other comprehensive income, net of tax	2,950	(20,357)	4,131	(14,221)
Comprehensive income attributable to IDEXX Laboratories, Inc.	$ 227,186	$ 111,622	$ 442,421	$ 311,723