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Income Taxes Income Taxes Details 6 (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Beginning Balance | $ 182,545 | $ 191,680 | $ 177,830
Reductions to tax positions related to the current year |  |  | (1,075)
Additions to tax positions related to prior years |  |  | 10,085
Reductions to tax positions related to prior years |  |  | (2,325)
Reductions to tax positions related to the acquisition offset to goodwill |  |  | (1,556)
Additions to tax positions related to the current year |  | 3,235 | 8,721
Reductions to tax positions related to prior years | (4,219) | (12,370) |
Ending Balance | 178,326 | 182,545 | 191,680
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 161,800 | 157,200 | 154,800
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 57,300 | 51,600 | 47,600
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | $ 5,700 | $ 4,000 | $ 3,100

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -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 -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
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