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Legal Proceedings and Contingencies - Indemnification and loss contingencies (Details) - complaint | Oct. 09, 2015 | Jul. 28, 2015
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Putative Class Action Complaint [Member] |  |
Contingencies |  |
Number of days allowed to file amended complaint |  | 60 days
Beth Seltzer v. Hunt, et al. |  |
Contingencies |  |
Number of new claims filed | 2 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The total number of new claims filed pertaining to a loss contingency during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition The number of days specified by scheduling order allowed for filing of amended complaint. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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