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v3.5.0.2

Subsequent Event (Details) number in Thousands, $ in Thousands | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Oct. 28, 2016 | Sep. 30, 2016 USD ($) | Oct. 25, 2016 USD ($)
Subsequent Event [Line Items] |  |  |
Long-term purchase commitment, amount |  | $ 24,000 |
Long-term purchase commitment, period |  | 24 months |
Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Subsequent event, date | Oct. 25, 2016 |  |
Payments to initiate note receivable |  |  | $ 2,000
Number of installment payments to be received per promissory note | 36 |  |

X
- Definition The initial cash outflow to initiate a Note Receivable supported by a written promise to pay. + References No definition available. + Details
Name: | tnc_CashOutflowtoInitiateNoteReceivable
Namespace Prefix: | tnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Number of installment payments to be received per the promissory note + References No definition available. + Details
Name: | tnc_NumberofInstallmentPaymentstobeReceivedperPromissoryNote
Namespace Prefix: | tnc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LongtermPurchaseCommitmentPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the event occurred after the balance sheet date but before financial statements are issues or available to be issued, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 855 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662 + Details
Name: | us-gaap_SubsequentEventsDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |