CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED - USD ($) shares in Thousands, $ in Thousands	Apr. 30, 2021	Oct. 31, 2020
Current assets:
Cash and cash equivalents	$ 385,444	$ 406,852
Accounts receivable, net	215,736	210,433
Contract assets	59,881	60,429
Inventories, net	462,586	463,205
Prepaid expenses and other current assets	39,774	24,706
Total current assets	1,163,421	1,165,625
Property, plant and equipment, net	177,315	168,848
Goodwill	1,400,048	1,383,167
Intangible assets, net	557,550	579,041
Other assets	296,834	251,030
Total assets	3,595,168	3,547,711
Current liabilities:
Current maturities of long-term debt	1,111	1,045
Trade accounts payable	87,467	76,237
Accrued expenses and other current liabilities	167,563	162,232
Income taxes payable	617	1,647
Total current liabilities	256,758	241,161
Long-term debt, net of current maturities	583,352	738,786
Deferred income taxes	47,409	55,658
Other long-term liabilities	324,493	280,291
Total liabilities	1,212,012	1,315,896
Commitments and contingencies
Redeemable noncontrolling interests	223,266	221,208
Shareholders' equity:
Preferred Stock, $.01 par value per share; 10,000 shares authorized; none issued	0	0
Common Stock	542	542
Capital in excess of par value	311,995	299,930
Deferred compensation obligation	4,777	4,886
HEICO stock held by irrevocable trust	(4,777)	(4,886)
Accumulated other comprehensive loss	1,674	(9,149)
Retained earnings	1,812,798	1,688,045
Total HEICO shareholders' equity	2,127,820	1,980,177
Noncontrolling interests	32,070	30,430
Total shareholders' equity	2,159,890	2,010,607
Total liabilities and equity	$ 3,595,168	$ 3,547,711
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	10,000	10,000
Preferred Stock, Shares Issued	0	0
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	150,000	150,000
Common Stock, Shares, Issued	54,225	54,195
Common Stock, Shares, Outstanding	54,225	54,195
Class A Common Stock [Member]
Shareholders' equity:
Common Stock	$ 811	$ 809
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	150,000	150,000
Common Stock, Shares, Issued	81,126	80,923
Common Stock, Shares, Outstanding	81,126	80,923