Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 228,364	$ 223,986
Accounts receivable, net of reserves of $3,053 in 2013 and $2,632 in 2012	158,988	138,324
Inventories	148,242	140,946
Deferred income tax assets	25,719	27,714
Other current assets	33,082	38,567
Total current assets	594,395	569,537
Long-Term Assets:
Property and equipment, net	253,742	245,177
Goodwill	172,459	174,994
Intangible assets, net	61,036	62,833
Other long-term assets, net	51,006	51,061
Total long-term assets	538,243	534,065
TOTAL ASSETS	1,132,638	1,103,602
Current Liabilities:
Accounts payable	38,716	35,288
Accrued liabilities	118,470	137,746
Line of credit	260,000	212,000
Current portion of long-term debt	1,122	1,107
Current portion of deferred revenue	21,269	20,192
Total current liabilities	439,577	406,333
Long-Term Liabilities:
Deferred income tax liabilities	22,955	23,028
Long-term debt, net of current portion	1,141	1,394
Long-term deferred revenue, net of current portion	12,851	12,692
Other long-term liabilities	24,819	23,898
Total long-term liabilities	61,766	61,012
Total liabilities	501,343	467,345
Commitments and Contingencies (Note 13)
Stockholders' Equity:
Common stock, $0.10 par value per share: Authorized: 120,000 shares; Issued: 100,608 and 100,160 shares in 2013 and 2012, respectively	10,061	10,016
Additional paid-in capital	779,261	757,214
Deferred stock units: Outstanding: 119 units in 2013 and 2012	4,815	4,630
Retained earnings	1,350,453	1,305,593
Accumulated other comprehensive income	11,687	15,954
Treasury stock, at cost: 46,381 and 45,652 shares in 2013 and 2012, respectively	(1,525,023)	(1,457,184)
Total IDEXX Laboratories, Inc. stockholders' equity	631,254	636,223
Noncontrolling interest	41	34
Total stockholders' equity	631,295	636,257
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,132,638	$ 1,103,602