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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2015
Income Tax Disclosure [Abstract] |
Components of Income Before Income Taxes | For financial reporting purposes, income before income taxes includes the following components (in thousands):
|  | Years Ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
United States |  | $ | 52,563 |  |  | $ | 47,963 |  |  | $ | 47,640 |
Foreign |  |  | 60,810 |  |  |  | 50,806 |  |  |  | 45,519 |
Total |  | $ | 113,373 |  |  | $ | 98,769 |  |  | $ | 93,159 |
Income Tax Expense (Benefit) | The expense (benefit) for income taxes consists of the following (in thousands):
|  | Years Ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Federal |  |  |  |  |  |  |  |  |  |  |  |
Current |  | $ | (6,889 | ) |  | $ | 7,895 |  |  | $ | 7,509 |
Deferred |  |  | 18,024 |  |  |  | 7,021 |  |  |  | 9,491 |
Total |  |  | 11,135 |  |  |  | 14,916 |  |  |  | 17,000 |
State |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 379 |  |  |  | 1,542 |  |  |  | 2,492 |
Deferred |  |  | (4,096 | ) |  |  | (2,397 | ) |  |  | (1,687 | )
Total |  |  | (3,717 | ) |  |  | (855 | ) |  |  | 805 |
Foreign |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 15,117 |  |  |  | 13,335 |  |  |  | 9,717 |
Deferred |  |  | 5,402 |  |  |  | 3,813 |  |  |  | 1,769 |
Total |  |  | 20,519 |  |  |  | 17,148 |  |  |  | 11,486 |
Total |  | $ | 27,937 |  |  | $ | 31,209 |  |  | $ | 29,291 |
Summary of Differences Between Income Tax Expense Computed at Statutory Federal Income Tax Rate and Per Consolidated Statements of Income | Differences between the income tax expense computed at the statutory federal income tax rate and per the consolidated statements of income are summarized as follows (in thousands):
|  | Years Ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Tax expense at federal rate of 35% |  | $ | 39,680 |  |  | $ | 34,569 |  |  | $ | 32,606 |
State income taxes, net of federal benefit |  |  | (2,462 | ) |  |  | (544 | ) |  |  | 675 |
Change in valuation allowance |  |  | (9,066 | ) |  |  | 3,521 |  |  |  | (1,615 | )
Foreign tax rate differential |  |  | (5,710 | ) |  |  | (5,508 | ) |  |  | (4,650 | )
Unrecognized tax benefit increase |  |  | 2,977 |  |  |  | 65 |  |  |  | 488 |
Tax effect of foreign operations |  |  | 261 |  |  |  | (104 | ) |  |  | 5,906 |
Acquisition Costs |  |  | — |  |  |  | 289 |  |  |  | 896 |
Tax benefit of research & development |  |  | (871 | ) |  |  | (3,446 | ) |  |  | (4,001 | )
Other |  |  | 3,128 |  |  |  | 2,367 |  |  |  | (1,014 | )
Income tax provision |  | $ | 27,937 |  |  | $ | 31,209 |  |  | $ | 29,291 |
Deferred Tax Assets and Liabilities Result from Differences in Timing of Recognition of Certain Income and Expense Items for Tax and Financial Accounting Purposes | The deferred tax assets and liabilities result from differences in the timing of the recognition of certain income and expense items for tax and financial accounting purposes. The sources of these differences at each balance sheet date are as follows (in thousands):
|  | December 31, |
|  | 2015 |  |  | 2014 |
Deferred income tax assets: |  |  |  |  |  |  |  |
Net operating loss carryforwards |  | $ | 112,193 |  |  | $ | 150,004 |
Tax credits |  |  | 40,614 |  |  |  | 43,804 |
Compensation |  |  | 25,752 |  |  |  | 24,486 |
Deferred revenue |  |  | 25,287 |  |  |  | 13,486 |
Tax basis in investments |  |  | 100 |  |  |  | 5,601 |
Other |  |  | 8,246 |  |  |  | 9,712 |
Gross deferred income tax assets |  |  | 212,192 |  |  |  | 247,093 |
Less: valuation allowance |  |  | (18,742 | ) |  |  | (36,174 | )
Net deferred income tax assets |  | $ | 193,450 |  |  | $ | 210,919 |
Deferred income tax liabilities: |  |  |  |  |  |  |  |
Depreciation and amortization |  | $ | (130,645 | ) |  | $ | (129,825 | )
Total deferred income tax liabilities |  |  | (130,645 | ) |  |  | (129,825 | )
Net deferred income taxes |  | $ | 62,805 |  |  | $ | 81,094 |
Deferred income taxes / liabilities included in the balance sheet are: |  |  |  |  |  |  |  |
Deferred income tax asset - noncurrent |  | $ | 90,872 |  |  | $ | 94,536 |
Deferred income tax liability - noncurrent |  |  | (28,067 | ) |  |  | (13,442 | )
Net deferred income taxes |  | $ | 62,805 |  |  | $ | 81,094 |
Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits | A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31 is as follows (in thousands):
|  | 2015 |  |  | 2014 |  |  | 2013 |
Balance of unrecognized tax benefits at beginning of year |  | $ | 14,780 |  |  | $ | 14,996 |  |  | $ | 13,079 |
Increases for tax positions of prior years |  |  | 1,449 |  |  |  | 84 |  |  |  | 1,560 |
Decreases for tax positions of prior years |  |  | (47 | ) |  |  | (412 | ) |  |  | (327 | )
Increases for tax positions established for the current period |  |  | 9,866 |  |  |  | 491 |  |  |  | 1,739 |
Decreases for settlements with taxing authorities |  |  | (594 | ) |  |  | — |  |  |  | (61 | )
Reductions resulting from lapse of applicable statute of limitation |  |  | (4,218 | ) |  |  | (239 | ) |  |  | (901 | )
Adjustment resulting from foreign currency translation |  |  | (157 | ) |  |  | (140 | ) |  |  | (93 | )
Balance of unrecognized tax benefits at end of year |  | $ | 21,079 |  |  | $ | 14,780 |  |  | $ | 14,996 |

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- Definition Tabular disclosure of 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 (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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