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Note 12 - Income Tax (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | 2016 |  | 2015
Income tax expense using combined statutory rate of 26.5% (2015 - 26.5%, 2014 - 26.5%) |  | $ | 21,632 |  |  | $ | 16,326 |
Permanent differences |  |  | 434 |  |  |  | 488 |
Tax effect of flow through entities |  |  | (243 | ) |  |  | (230 | )
Impact of changes in foreign exchange rates |  |  | - |  |  |  | (10 | )
Adjustments to tax liabilities for prior periods |  |  | (456 | ) |  |  | 1,393 |
Effects of changes in enacted tax rates |  |  | - |  |  |  | (42 | )
Changes in liability for unrecognized tax benefits |  |  | (156 | ) |  |  | (130 | )
Foreign, state and provincial tax rate differential |  |  | 5,699 |  |  |  | 3,750 |
Gain on disposition of preferred shares |  |  | - |  |  |  | 1,246 |
Other taxes |  |  | 477 |  |  |  | (161 | )
Change in valuation allowances |  |  | - |  |  |  | 782 |
Provision for income taxes as reported |  | $ | 27,387 |  |  | $ | 23,412 |
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] |
|  | 2016 |  | 2015
Canada |  | $ | 16,989 |  |  | $ | 8,590 |
United States |  |  | 64,641 |  |  |  | 53,020 |
Total |  | $ | 81,630 |  |  | $ | 61,610 |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | 2016 |  | 2015
Current |  |  |  |  |  |  |  |
Canada |  | $ | 3,689 |  |  | $ | 829 |
United States |  |  | 21,945 |  |  |  | 10,757 |
|  |  | 25,634 |  |  |  | 11,586 |
Deferred |  |  |  |  |  |  |  |
Canada |  |  | (317 | ) |  |  | 1,352 |
United States |  |  | 2,070 |  |  |  | 10,474 |
|  |  | 1,753 |  |  |  | 11,826 |
Total |  | $ | 27,387 |  |  | $ | 23,412 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | 2016 |  | 2015
Deferred income tax assets |  |  |  |  |  |  |  |
Loss carry-forwards |  | $ | 1,066 |  |  | $ | 6,071 |
Expenses not currently deductible |  |  | 18,120 |  |  |  | 13,245 |
Stock-based compensation |  |  | 2,956 |  |  |  | 2,420 |
Basis differences of partnerships and other entities |  |  | 1,047 |  |  |  | 925 |
Allowance for doubtful accounts |  |  | 3,457 |  |  |  | 2,967 |
Inventory and other reserves |  |  | 542 |  |  |  | 548 |
|  |  | 27,188 |  |  |  | 26,176 |
Deferred income tax liabilities |  |  |  |  |  |  |  |
Depreciation and amortization |  |  | 31,168 |  |  |  | 13,971 |
Prepaid and other expenses deducted for tax purposes |  |  | 1,942 |  |  |  | 1,782 |
|  |  | 33,110 |  |  |  | 15,753 |
Net deferred income tax asset (liability) before valuation allowance |  |  | (5,922 | ) |  |  | 10,423 |
Valuation allowance |  |  | 756 |  |  |  | 783 |
Net deferred income tax asset (liability) |  | $ | (6,678 | ) |  | $ | 9,640 |
Summary of Operating Loss Carryforwards [Table Text Block] |
|  | Loss carry forward |  | Gross losses not recognized |  | Net
|  | 2016 |  | 2015 |  | 2016 |  | 2015 |  | 2016 |  | 2015
Canada |  | $ | 2,082 |  |  | $ | 3,234 |  |  | $ | - |  |  | $ | - |  |  | $ | 2,082 |  |  | $ | 3,234 |
United States |  |  | 7,902 |  |  |  | 21,472 |  |  |  | 6,470 |  |  |  | 6,470 |  |  |  | 1,432 |  |  |  | 15,002 |
Summary of Income Tax Contingencies [Table Text Block] |
Balance, December 31, 2014 |  | $ | 494 |
Reduction for lapses in applicable statutes of limitations |  |  | (202 | )
Balance, December 31, 2015 |  |  | 292 |
Increases based on tax positions related to 2016 |  |  | (144 | )
Balance, December 31, 2016 |  | $ | 148 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 + Details
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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 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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