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Commitments and Contingencies (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Long-term Purchase Commitment [Line Items]
Aggregate residual value at lease expiration for vehicle leases	$ 13,643
Guaranteed aggregate residual value at lease expiration for vehicle leases	11,013
Liability for the estimated end of term loss related to residual value guarantee	295
Green Machine supply commitment
Long-term Purchase Commitment [Line Items]
Purchase obligation, due in next twelve months	12,000
Long-term purchase commitment, amount	$ 24,000
Long-term purchase commitment, period	2 years
Software development arrangement
Long-term Purchase Commitment [Line Items]
Purchase obligation, due in next twelve months	$ 3,000
Long-term purchase commitment, amount	$ 8,000
Long-term purchase commitment, period	4 years

X

- Definition

The aggregate residual value at lease expiration for vehicle leases.

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
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X

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

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X

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

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X

- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

+ Details

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X

- 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.

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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

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- Definition

Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

+ References

No definition available.

+ Details

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- Details

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- Details

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