Consolidated Balance Sheets - USD ($)	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 42,715,000	$ 48,154,000
Deposits with clearing organizations	70,938,000	42,222,000
Receivable from brokers, dealers and clearing organizations	171,130,000	187,115,000
Receivable from customers, net of allowance for credit losses of $809 ($769 in 2017)	881,941,000	848,226,000
Income tax receivable	3,132,000	2,939,000
Securities purchased under agreements to resell, at fair value	0	658,000
Securities owned, including amounts pledged of $688,647 ($655,683 in 2017), at fair value	999,627,000	926,597,000
Notes receivable, net of accumulated amortization and allowance for uncollectibles of $24,680 and $8,120, respectively ($24,705 and $7,975, respectively, in 2017)	42,386,000	40,520,000
Furniture, equipment and leasehold improvements, net of accumulated depreciation of $84,344 ($82,826 in 2017)	28,341,000	27,187,000
Intangible assets	32,100,000	31,700,000
Goodwill	137,889,000	137,889,000
Other assets	123,777,000	145,310,000
Total assets	2,533,976,000	2,438,517,000
Liabilities
Drafts payable	20,993,000	42,412,000
Bank call loans	147,400,000	118,300,000
Payable to brokers, dealers and clearing organizations	255,126,000	211,483,000
Payable to customers	445,085,000	385,907,000
Securities sold under agreements to repurchase	576,017,000	586,478,000
Securities sold but not yet purchased, at fair value	147,886,000	94,486,000
Accrued compensation	103,751,000	173,116,000
Accounts payable and other liabilities	94,172,000	92,495,000
Senior secured notes, net of debt issuance costs of $1,098 ($1,163 in 2017)	198,902,000	198,837,000
Deferred tax liabilities, net of deferred tax assets of $44,138 ($47,597 in 2017)	14,135,000	11,092,000
Total liabilities	2,003,467,000	1,914,606,000
Commitments and contingencies (note 12)
Share capital
Common stock	58,529,000	58,492,000
Contributed capital	37,996,000	36,546,000
Retained earnings	432,179,000	426,930,000
Accumulated other comprehensive income	1,440,000	1,582,000
Total Oppenheimer Holdings Inc. stockholders' equity	530,144,000	523,550,000
Non-controlling interest	365,000	361,000
Total stockholders' equity	530,509,000	523,911,000
Total liabilities and stockholders' equity	2,533,976,000	2,438,517,000
Class A Stock
Share capital
Common stock	58,396,000	58,359,000
Class B Stock
Share capital
Common stock	$ 133,000	$ 133,000