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Income taxes (Tables) | 12 Months Ended
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Dec. 31, 2016
Income Tax Disclosure [Abstract] |
Schedule of Reconciliation of Effective Income Tax Rate | The income tax provision from continuing operations shown in the consolidated statements of operations is reconciled to amounts of tax that would have been payable (recoverable) from the application of the federal tax rate to pre-tax profit, as follows:
(Expressed in thousands) |  |  |  |  |  |  |  |  |  |  |
| For the Years Ended December 31,
| 2016 |  | 2015 |  | 2014
| Amount |  | Percentage |  | Amount |  | Percentage |  | Amount |  | Percentage
U.S. federal statutory income tax rate | $ | (7,662 | ) |  | 35.0 | % |  | $ | (851 | ) |  | 35.0 | % |  | $ | 6,017 |  |  | 35.0 | %
U.S. state and local income taxes, net of U.S. federal income tax benefits | (1,075 | ) |  | 4.9 | % |  | (69 | ) |  | 2.8 | % |  | 1,432 |  |  | 8.3 | %
Unrecognized tax benefit | (603 | ) |  | 2.8 | % |  | 589 |  |  | -24.3 | % |  | 6 |  |  | — | %
Valuation allowance | 1,208 |  |  | -5.5 | % |  | — |  |  | — | % |  | — |  |  | — | %
Non-taxable income | (1,267 | ) |  | 5.8 | % |  | (696 | ) |  | 28.7 | % |  | (593 | ) |  | -3.4 | %
Non-deductible legal and regulatory expenses | — |  |  | — | % |  | — |  |  | — | % |  | 5,296 |  |  | 30.8 | %
Provision to return adjustments | (4,167 | ) |  | 19.0 | % |  | 442 |  |  | -18.2 | % |  | (3 | ) |  | — | %
Change in tax rates | 264 |  |  | -1.2 | % |  | 305 |  |  | -12.5 | % |  | 53 |  |  | 0.3 | %
Foreign tax rate differentials | 143 |  |  | -0.7 | % |  | 145 |  |  | -6.0 | % |  | (447 | ) |  | -2.6 | %
Other non-deductible expenses | 897 |  |  | -4.1 | % |  | 541 |  |  | -22.2 | % |  | 373 |  |  | 2.2 | %
Total income tax provision | $ | (12,262 | ) |  | 56.0 | % |  | $ | 406 |  |  | -16.7 | % |  | $ | 12,134 |  |  | 70.6 | %
Schedule of Current and Deferred Income Tax (Benefit) | Income taxes from continuing operations included in the consolidated statements of operations represent the following:
(Expressed in thousands) |  |  |  |  |
| For the Years Ended December 31,
| 2016 |  | 2015 |  | 2014
Current: |  |  |  |  |
U.S. federal tax (benefit) | $ | (15,433 | ) |  | $ | (5,751 | ) |  | $ | 9,294 |
State and local tax | (4,631 | ) |  | (74 | ) |  | 817 |
Non-U.S. operations | 46 |  |  | 181 |  |  | (264 | )
Total Current | (20,018 | ) |  | (5,644 | ) |  | 9,847 |
Deferred: |  |  |  |  |
U.S. federal tax | 5,856 |  |  | 4,198 |  |  | (529 | )
State and local tax | 617 |  |  | 1,632 |  |  | 1,529 |
Non-U.S. operations | 1,283 |  |  | 220 |  |  | 1,287 |
Total Deferred | 7,756 |  |  | 6,050 |  |  | 2,287 |
Total | $ | (12,262 | ) |  | $ | 406 |  |  | $ | 12,134 |
Schedule of Significant Components of Deferred Tax Assets and Liabilities | Significant components of the Company's deferred tax assets and liabilities from continuing operations as of December 31, 2016 and 2015 were as follows:
(Expressed in thousands) |  |  |
| As of December 31,
| 2016 |  | 2015
Deferred tax assets: |  |  |
Deferred compensation | $ | 26,271 |  |  | $ | 27,423 |
Deferred rent and lease incentives | 15,354 |  |  | 16,437 |
Receivable reserves | 3,554 |  |  | 4,478 |
Accrued expenses | 1,992 |  |  | 3,350 |
Auction rate securities reserves | 1,194 |  |  | 2,666 |
Net operating losses and credits | 4,917 |  |  | 4,164 |
Involuntary conversion | 2,381 |  |  | 2,245 |
Depreciation | 1,446 |  |  | — |
Other | 1,953 |  |  | 2,718 |
Total deferred tax assets | 59,062 |  |  | 63,481 |
Valuation allowance | 1,280 |  |  | 126 |
Deferred tax assets after valuation allowance | 57,782 |  |  | 63,355 |
Deferred tax liabilities: |  |  |
Goodwill | 57,117 |  |  | 53,364 |
Partnership investments | 6,042 |  |  | 7,444 |
Company-owned life insurance | 7,478 |  |  | 6,431 |
Change in accounting method | — |  |  | 1,313 |
Depreciation | — |  |  | 672 |
Other | 282 |  |  | 248 |
Total deferred tax liabilities | 70,919 |  |  | 69,472 |
Deferred tax liabilities, net | $ | (13,137 | ) |  | $ | (6,117 | )
Schedule of Unrecognized Tax Benefits | A reconciliation of the beginning and ending amount of unrecognized tax benefit follows:
(Expressed in thousands) |  |  |  |  |
| 2016 |  | 2015 |  | 2014
Balance at beginning of year | $ | 2,490 |  |  | $ | 1,583 |  |  | $ | 1,574 |
Additions for tax positions of prior years | 98 |  |  | 907 |  |  | — |
Additions for tax positions of current year | — |  |  | — |  |  | 9 |
Lapse in statute of limitations | (652 | ) |  | — |  |  | — |
Settlements with taxing authorities | (848 | ) |  | — |  |  | — |
Balance at end of year | $ | 1,088 |  |  | $ | 2,490 |  |  | $ | 1,583 |

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32840-109319 + Details
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