Consolidated Balance Sheets - USD ($)	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 48,154,000	$ 64,913,000
Deposits with clearing organizations	42,222,000	38,185,000
Receivable from brokers, dealers and clearing organizations	187,115,000	214,934,000
Receivable from customers, net of allowance for credit losses of $769 ($794 in 2016)	848,226,000	847,386,000
Income tax receivable	2,939,000	5,816,000
Securities purchased under agreements to resell	658,000	24,006,000
Securities owned, including amounts pledged of $655,683 ($438,385 in 2016), at fair value	926,597,000	707,108,000
Notes receivable, net of accumulated amortization and allowance for uncollectibles of $24,705 and $7,975, respectively ($24,826 and $6,784, respectively, in 2016)	40,520,000	30,099,000
Furniture, equipment and leasehold improvements, net of accumulated depreciation of $82,826 ($84,073 in 2016)	27,187,000	27,233,000
Intangible assets	31,700,000	31,700,000
Goodwill	137,889,000	137,889,000
Other assets	145,310,000	107,661,000
Total assets	2,438,517,000	2,236,930,000
Liabilities
Drafts payable	42,412,000	39,228,000
Bank call loans	118,300,000	145,800,000
Payable to brokers, dealers and clearing organizations	211,483,000	221,389,000
Payable to customers	385,907,000	449,946,000
Securities sold under agreements to repurchase	586,478,000	378,084,000
Securities sold but not yet purchased, at fair value	94,486,000	85,050,000
Accrued compensation	173,116,000	145,053,000
Accounts payable and other liabilities	92,495,000	96,557,000
Senior secured notes, net of debt issuance costs of $1,163 ($648 in 2016)	198,837,000	149,352,000
Deferred tax liabilities, net of deferred tax assets of $47,597 ($59,062 in 2016)	11,092,000	13,137,000
Total liabilities	1,914,606,000	1,723,596,000
Commitments and contingencies (note 15)
Share capital
Common stock	58,492,000	59,361,000
Contributed capital	36,546,000	41,765,000
Retained earnings	426,930,000	410,258,000
Accumulated other comprehensive income (loss)	1,582,000	(681,000)
Total Oppenheimer Holdings Inc. stockholders' equity	523,550,000	510,703,000
Noncontrolling interest	361,000	2,631,000
Total stockholders' equity	523,911,000	513,334,000
Total liabilities and stockholders' equity	2,438,517,000	2,236,930,000
Class A Stock
Share capital
Common stock	58,359,000	59,228,000
Class B Stock
Share capital
Common stock	$ 133,000	$ 133,000