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Income Tax (Tables) | 12 Months Ended
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Dec. 31, 2015
Income Tax Disclosure [Abstract] |
Income Tax Provision (Benefit) on Income from Operations | The income tax provision (benefit) on income from operations consists of the following:
|  | Years ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 44,841 |  |  | $ | 34,504 |  |  | $ | 25,625 |
State |  |  | 6,670 |  |  |  | 4,827 |  |  |  | 2,590 |
|  |  | 51,511 |  |  |  | 39,331 |  |  |  | 28,215 |
Deferred |  |  | (7,956 | ) |  |  | (3,804 | ) |  |  | (1,497 | )
|  | $ | 43,555 |  |  | $ | 35,527 |  |  | $ | 26,718 |
Reconciliation of U.S. Statutory Income Tax Rate to Effective Income Tax Expense Rate | Reconciliation of the U.S. statutory income tax rate to our effective income tax expense rate for operations follows:
|  | Years ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Federal income tax expense at statutory rate |  | $ | 37,949 |  |  | $ | 33,064 |  |  | $ | 23,037 |
State income tax, net of federal income tax benefit |  |  | 3,715 |  |  |  | 2,867 |  |  |  | 2,371 |
Non-deductible business expenses |  |  | 2,414 |  |  |  | 1,485 |  |  |  | 1,110 |
Qualified manufacturing activities |  |  | (466 | ) |  |  | (1,720 | ) |  |  | — |
Other, net |  |  | (57 | ) |  |  | (169 | ) |  |  | 200 |
|  | $ | 43,555 |  |  | $ | 35,527 |  |  | $ | 26,718 |
Schedule of Deferred Tax Assets and Liabilities | The tax effects of the major items recorded as deferred tax assets and liabilities as of December 31 are:
|  | 2015 |  |  | 2014 |
Deferred income tax assets: |  |  |  |  |  |  |  |
Operating expenses not currently deductible |  | $ | 9,953 |  |  | $ | 9,093 |
Stock option and other employee benefit plans |  |  | 13,504 |  |  |  | 9,815 |
Capital loss and credit carryforward |  |  | 179 |  |  |  | 177 |
Property and equipment |  |  | — |  |  |  | 46 |
Total deferred income tax assets |  |  | 23,636 |  |  |  | 19,131 |
Deferred income tax liabilities: |  |  |  |  |  |  |  |
Intangible assets |  |  | (111,653 | ) |  |  | (13,424 | )
Property and equipment |  |  | (2,781 | ) |  |  | — |
Other |  |  | (228 | ) |  |  | (203 | )
Total deferred income tax liabilities |  |  | (114,662 | ) |  |  | (13,627 | )
Net deferred income tax (liability) asset |  | $ | (91,026 | ) |  | $ | 5,504 |

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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=6907707&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=6907707&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=6907707&loc=d3e32687-109319 + Details
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