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Supplemental Guarantor Condensed Consolidated Financial Statements - Condensed Consolidating Balance Sheet (Details) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Cash and cash equivalents | $ 48,154,000 | $ 64,913,000 | $ 63,364,000 | $ 63,807,000
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, 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 |  |
Office facilities, net of accumulated depreciation of $104,065 ($97,118 in 2013) | 27,187,000 | 27,233,000 |  |
Subordinated loan receivable | 0 | 0 |  |
Intangible assets | 31,700,000 | 31,700,000 |  |
Goodwill | 137,889,000 | 137,889,000 |  |
Other assets | 145,310,000 | 107,661,000 |  |
Deferred tax assets | 0 | 0 |  |
Investment in subsidiaries | 0 | 0 |  |
Intercompany receivables | 0 | 0 |  |
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 |  |
Income tax payable | 0 | 0 |  |
Senior secured notes, net of debt issuance costs of $1,163 ($648 in 2016) | 198,837,000 | 149,352,000 |  |
Subordinated indebtedness | 0 | 0 |  |
Deferred tax liabilities, net | 11,092,000 | 13,137,000 |  |
Intercompany payables | 0 | 0 |  |
Total liabilities | 1,914,606,000 | 1,723,596,000 |  |
Stockholders' equity |  |  |  |
Stockholders' equity attributable to Oppenheimer Holdings Inc. | 523,550,000 | 510,703,000 |  |
Noncontrolling interest | 361,000 | 2,631,000 |  |
Total stockholders' equity | 523,911,000 | 513,334,000 | 525,082,000 |
Total liabilities and stockholders' equity | 2,438,517,000 | 2,236,930,000 |  |
Allowance for credit losses | 769,000 | 794,000 |  |
Amounts pledged | 655,683,000 | 438,385,000 |  |
Notes Receivable, Net Accumulated Amortization | 24,705,000 | 24,826,000 |  |
Notes Receivable, Net Allowance for Uncollectibles | 7,975,000 | 6,784,000 |  |
Net accumulated depreciation | 82,826,000 | 84,073,000 |  |
Unamortized debt issuance expense | 1,163,000 | 648,000 |  |
Eliminations |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 0 | 0 | 0 | 0
Deposits with clearing organizations | 0 | 0 |  |
Receivable from brokers, dealers and clearing organizations | 0 | 0 |  |
Receivable from customers, net of allowance for credit losses of $769 ($794 in 2016) | 0 | 0 |  |
Income tax receivable | (69,084,000) | (64,469,000) |  |
Securities purchased under agreements to resell | 0 | 0 |  |
Securities owned, at fair value | 0 | 0 |  |
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) | 0 | 0 |  |
Office facilities, net of accumulated depreciation of $104,065 ($97,118 in 2013) | 0 | 0 |  |
Subordinated loan receivable | (112,558,000) | (112,558,000) |  |
Intangible assets | 0 | 0 |  |
Goodwill | 0 | 0 |  |
Other assets | 0 | 0 |  |
Deferred tax assets | (21,965,000) | (38,664,000) |  |
Investment in subsidiaries | (1,130,571,000) | (1,068,390,000) |  |
Intercompany receivables | (135,586,000) | (75,820,000) |  |
Total assets | (1,469,764,000) | (1,359,901,000) |  |
Liabilities |  |  |  |
Drafts payable | 0 | 0 |  |
Bank call loans | 0 | 0 |  |
Payable to brokers, dealers and clearing organizations | 0 | 0 |  |
Payable to customers | 0 | 0 |  |
Securities sold under agreements to repurchase | 0 | 0 |  |
Securities sold but not yet purchased, at fair value | 0 | 0 |  |
Accrued compensation | 0 | 0 |  |
Accounts payable and other liabilities | 0 | 0 |  |
Income tax payable | (69,084,000) | (64,469,000) |  |
Senior secured notes, net of debt issuance costs of $1,163 ($648 in 2016) | 0 | 0 |  |
Subordinated indebtedness | (112,558,000) | (112,558,000) |  |
Deferred tax liabilities, net | (21,965,000) | (38,664,000) |  |
Intercompany payables | (135,586,000) | (75,820,000) |  |
Total liabilities | (339,193,000) | (291,511,000) |  |
Stockholders' equity |  |  |  |
Stockholders' equity attributable to Oppenheimer Holdings Inc. | (1,130,571,000) | (1,068,390,000) |  |
Noncontrolling interest | 0 | 0 |  |
Total stockholders' equity | (1,130,571,000) | (1,068,390,000) |  |
Total liabilities and stockholders' equity | (1,469,764,000) | (1,359,901,000) |  |
Guarantor Subsidiaries |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 3,716,000 | 10,284,000 | 2,586,000 | 1,557,000
Deposits with clearing organizations | 0 | 0 |  |
Receivable from brokers, dealers and clearing organizations | 0 | 0 |  |
Receivable from customers, net of allowance for credit losses of $769 ($794 in 2016) | 0 | 0 |  |
Income tax receivable | 26,025,000 | 28,289,000 |  |
Securities purchased under agreements to resell | 0 | 0 |  |
Securities owned, at fair value | 1,386,000 | 23,227,000 |  |
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) | 0 | 0 |  |
Office facilities, net of accumulated depreciation of $104,065 ($97,118 in 2013) | 20,221,000 | 21,963,000 |  |
Subordinated loan receivable | 112,558,000 | 112,558,000 |  |
Intangible assets | 0 | 0 |  |
Goodwill | 0 | 0 |  |
Other assets | 2,573,000 | 2,598,000 |  |
Deferred tax assets | 0 | 309,000 |  |
Investment in subsidiaries | 507,747,000 | 483,623,000 |  |
Intercompany receivables | 83,437,000 | 37,914,000 |  |
Total assets | 757,663,000 | 720,765,000 |  |
Liabilities |  |  |  |
Drafts payable | 0 | 0 |  |
Bank call loans | 0 | 0 |  |
Payable to brokers, dealers and clearing organizations | 0 | 0 |  |
Payable to customers | 0 | 0 |  |
Securities sold under agreements to repurchase | 0 | 0 |  |
Securities sold but not yet purchased, at fair value | 0 | 0 |  |
Accrued compensation | 0 | 0 |  |
Accounts payable and other liabilities | 33,994,000 | 34,920,000 |  |
Income tax payable | 22,189,000 | 22,189,000 |  |
Senior secured notes, net of debt issuance costs of $1,163 ($648 in 2016) | 0 | 0 |  |
Subordinated indebtedness | 0 | 0 |  |
Deferred tax liabilities, net | 17,000 | 7,000 |  |
Intercompany payables | 62,163,000 | 62,205,000 |  |
Total liabilities | 118,363,000 | 119,321,000 |  |
Stockholders' equity |  |  |  |
Stockholders' equity attributable to Oppenheimer Holdings Inc. | 639,300,000 | 601,444,000 |  |
Noncontrolling interest | 0 | 0 |  |
Total stockholders' equity | 639,300,000 | 601,444,000 |  |
Total liabilities and stockholders' equity | 757,663,000 | 720,765,000 |  |
Non-Guarantor Subsidiaries |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 36,996,000 | 54,400,000 | 59,871,000 | 61,811,000
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 | 0 | 0 |  |
Securities purchased under agreements to resell | 658,000 | 24,006,000 |  |
Securities owned, at fair value | 925,211,000 | 683,881,000 |  |
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 |  |
Office facilities, net of accumulated depreciation of $104,065 ($97,118 in 2013) | 6,966,000 | 5,270,000 |  |
Subordinated loan receivable | 0 | 0 |  |
Intangible assets | 31,700,000 | 31,700,000 |  |
Goodwill | 137,889,000 | 137,889,000 |  |
Other assets | 142,604,000 | 104,992,000 |  |
Deferred tax assets | 18,463,000 | 37,961,000 |  |
Investment in subsidiaries | 0 | 0 |  |
Intercompany receivables | 0 | 0 |  |
Total assets | 2,418,570,000 | 2,210,703,000 |  |
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 | 51,280,000 | 58,769,000 |  |
Income tax payable | 44,455,000 | 39,840,000 |  |
Senior secured notes, net of debt issuance costs of $1,163 ($648 in 2016) | 0 | 0 |  |
Subordinated indebtedness | 112,558,000 | 112,558,000 |  |
Deferred tax liabilities, net | 33,040,000 | 51,794,000 |  |
Intercompany payables | 73,423,000 | 13,615,000 |  |
Total liabilities | 1,926,938,000 | 1,741,126,000 |  |
Stockholders' equity |  |  |  |
Stockholders' equity attributable to Oppenheimer Holdings Inc. | 491,271,000 | 466,946,000 |  |
Noncontrolling interest | 361,000 | 2,631,000 |  |
Total stockholders' equity | 491,632,000 | 469,577,000 |  |
Total liabilities and stockholders' equity | 2,418,570,000 | 2,210,703,000 |  |
Parent |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 7,442,000 | 229,000 | 907,000 | $ 439,000
Deposits with clearing organizations | 0 | 0 |  |
Receivable from brokers, dealers and clearing organizations | 0 | 0 |  |
Receivable from customers, net of allowance for credit losses of $769 ($794 in 2016) | 0 | 0 |  |
Income tax receivable | 45,998,000 | 41,996,000 |  |
Securities purchased under agreements to resell | 0 | 0 |  |
Securities owned, at fair value | 0 | 0 |  |
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) | 0 | 0 |  |
Office facilities, net of accumulated depreciation of $104,065 ($97,118 in 2013) | 0 | 0 |  |
Subordinated loan receivable | 0 | 0 |  |
Intangible assets | 0 | 0 |  |
Goodwill | 0 | 0 |  |
Other assets | 133,000 | 71,000 |  |
Deferred tax assets | 3,502,000 | 394,000 |  |
Investment in subsidiaries | 622,824,000 | 584,767,000 |  |
Intercompany receivables | 52,149,000 | 37,906,000 |  |
Total assets | 732,048,000 | 665,363,000 |  |
Liabilities |  |  |  |
Drafts payable | 0 | 0 |  |
Bank call loans | 0 | 0 |  |
Payable to brokers, dealers and clearing organizations | 0 | 0 |  |
Payable to customers | 0 | 0 |  |
Securities sold under agreements to repurchase | 0 | 0 |  |
Securities sold but not yet purchased, at fair value | 0 | 0 |  |
Accrued compensation | 0 | 0 |  |
Accounts payable and other liabilities | 7,221,000 | 2,868,000 |  |
Income tax payable | 2,440,000 | 2,440,000 |  |
Senior secured notes, net of debt issuance costs of $1,163 ($648 in 2016) | 198,837,000 | 149,352,000 |  |
Subordinated indebtedness | 0 | 0 |  |
Deferred tax liabilities, net | 0 | 0 |  |
Intercompany payables | 0 | 0 |  |
Total liabilities | 208,498,000 | 154,660,000 |  |
Stockholders' equity |  |  |  |
Stockholders' equity attributable to Oppenheimer Holdings Inc. | 523,550,000 | 510,703,000 | $ 518,058,000 |
Noncontrolling interest | 0 | 0 |  |
Total stockholders' equity | 523,550,000 | 510,703,000 |  |
Total liabilities and stockholders' equity | $ 732,048,000 | $ 665,363,000 |  |

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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