v3.8.0.1

Basis and Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Effective income tax rate reconciliation, excess tax benefit, amount | $ 1,000 |
Net cash provided by (used in) operating activities | 180,273 | $ 461,787
Net cash provided by (used in) in financing activities | $ (176,899) | (153,252)
Adjustments for New Accounting Pronouncement | Accounting Standards Update 2016-09, Excess Tax Benefit Component |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Net cash provided by (used in) operating activities |  | 700
Net cash provided by (used in) in financing activities |  | (700)
Adjustments for New Accounting Pronouncement | Accounting Standards Update 2016-09, Statutory Tax Withholding Component |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Net cash provided by (used in) operating activities |  | 2,000
Net cash provided by (used in) in financing activities |  | $ (2,000)

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- Definition Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount + References No definition available. + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3574-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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