BUSINESS COMBINATIONS - Fair value of assets acquired and liabilities assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022	Jul. 07, 2022	Jan. 27, 2022	Jan. 10, 2022	Dec. 29, 2021	Nov. 05, 2021	Oct. 04, 2021
Assets acquired and liabilities assumed:
Goodwill	$ 94,286	$ 157,825
Plato BioPharma Inc
Assets acquired and liabilities assumed:
Cash								$ 1,027
Trade receivables and contract assets								853
Prepaid expenses and other current assets								133
Property and equipment								1,127
Operating lease right-of-use assets, net								2,272
Goodwill								9,279
Intangible assets								4,800
Accounts payable								(113)
Accrued expenses and other liabilities								(343)
Long-term operating leases, net								(2,272)
Deferred tax liabilities								(1,457)
Total								$ 15,306
Envigo RMS Holding Corp
Assets acquired and liabilities assumed:
Cash							$ 2,488
Restricted cash							435
Trade receivables and contract assets							43,566
Inventories							40,000
Prepaid expenses and other current assets							17,373
Property and equipment							106,338
Operating lease right-of-use assets, net							13,229
Goodwill							282,768
Other assets							7,676
Accounts payable							(25,832)
Accrued expenses and other liabilities							(11,665)
Fees invoiced in advance							(7,047)
Current portion on long-term operating lease							(4,371)
Long-term operating leases, net							(8,634)
Other liabilities							(5,339)
Deferred tax liabilities							(77,291)
Noncontrolling interest							880
Total							674,574
Envigo RMS Holding Corp | Customer relationships
Assets acquired and liabilities assumed:
Intangible assets							251,000
Envigo RMS Holding Corp | Intellectual property
Assets acquired and liabilities assumed:
Intangible assets							$ 49,000
Robinson Services, Inc.
Assets acquired and liabilities assumed:
Customer relationship						$ 4,700
Non-compete agreement						300
Supply agreement						200
Goodwill						948
Total						$ 6,148
Integrated Laboratory Systems, LLC (ILS)
Assets acquired and liabilities assumed:
Cash					$ 797
Trade receivables and contract assets					4,730
Property and equipment					4,436
Operating lease right-of-use assets, net					4,994
Goodwill					25,283
Intangible assets					22,300
Accounts payable					(1,165)
Accrued expenses and other liabilities					(905)
Fees invoiced in advance					(2,472)
Long-term operating leases, net					(4,554)
Total					$ 53,444
Orient BioResource Center, Inc
Assets acquired and liabilities assumed:
Cash				$ 5,481
Trade receivables and contract assets				2,025
Inventories				9,400
Prepaid expenses and other current assets				2,609
Property and equipment				8,336
Goodwill				18,624
Intangible assets				13,400
Accounts payable				(552)
Accrued expenses and other liabilities				(285)
Fees invoiced in advance				(6,548)
Deferred tax liabilities				(3,216)
Total				$ 49,274
Protypia, Inc.
Assets acquired and liabilities assumed:
Goodwill			$ 6,002
Intangible assets			5,600
Other liabilities			(84)
Deferred tax liabilities			(652)
Total			$ 10,866