CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
ASSETS
Cash and cash equivalents	$ 33,214,000	$ 28,835,000
Deposits with clearing organizations	108,415,000	78,706,000
Receivable from brokers, dealers and clearing organizations	297,031,000	284,696,000
Receivable from customers, net of allowance for credit losses of $220 ($345 in 2023)	1,161,685,000	1,059,892,000
Income tax receivable	6,009,000	7,199,000
Securities purchased under agreements to resell	4,079,000	5,842,000
Securities owned, including amounts pledged of $867,341 ($689,381 in 2023), at fair value	1,043,256,000	795,312,000
Notes receivable, net	63,342,000	62,640,000
Furniture, equipment and leasehold improvements, net of accumulated depreciation of $87,808 ($82,732 in 2023)	40,163,000	43,874,000
Right-of-use lease assets, net of accumulated amortization of $107,581 ($99,716 in 2023)	132,441,000	140,554,000
Corporate-owned life insurance	94,646,000	88,989,000
Goodwill	142,162,000	142,162,000
Intangible assets	34,187,000	34,340,000
Other assets	101,908,000	101,775,000
Total assets	3,262,538,000	2,874,816,000
Liabilities
Drafts payable	21,762,000	9,002,000
Bank call loans	218,800,000	0
Payable to brokers, dealers and clearing organizations	278,226,000	361,890,000
Payable to customers	325,886,000	369,287,000
Securities sold under agreements to repurchase	822,785,000	640,382,000
Securities sold but not yet purchased, at fair value	177,251,000	31,676,000
Accrued compensation	209,502,000	256,244,000
Accounts payable and other liabilities	69,187,000	82,810,000
Lease liabilities	172,604,000	183,273,000
Senior secured notes, net of debt issuance costs of $283 ($392 in 2023)	112,767,000	112,658,000
Deferred tax liabilities, net of deferred tax assets of $44,087 ($45,961 in 2023)	41,708,000	38,355,000
Total liabilities	2,450,478,000	2,085,577,000
Commitments and contingencies (Note 14)
Stockholders' equity
Common stock ($0.001 par value per share): Class A: shares authorized: 50,000,000; shares issued and outstanding: 10,227,845 and 10,186,783 as of June 30, 2024 and December 31, 2023, respectively Class B: shares authorized, issued and outstanding: 99,665 as of June 30, 2024 and December 31, 2023	10,000	10,000
Additional paid-in capital	23,365,000	31,774,000
Retained earnings	788,739,000	756,468,000
Accumulated other comprehensive income (loss)	(54,000)	914,000
Total Oppenheimer Holdings Inc. stockholders' equity	812,060,000	789,166,000
Noncontrolling interest (Note 2)	0	73,000
Total Stockholders' equity	812,060,000	789,239,000
Total Liabilities and Stockholders' Equity	$ 3,262,538,000	$ 2,874,816,000