The amount of additional borrowing capacity under a line of credit that is available as of the balance sheet date.

No definition available.

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Balance Type:	credit
Period Type:	instant

- Definition

The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for foreign subsidiaries of the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The maximum dollar amount that can be paid for an acquisition if leverage is above the maximum ratio as allowed under debt covenant.

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The maximum Line of credit facility restrictive covenant on indebtedness to EBITDA ratio.

+ References

No definition available.

+ Details

Name:	tnc_LineOfCreditFacilityCovenantRestrictionMaximumIndebtednessToEbitda
Namespace Prefix:	tnc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum leverage ratio allowed under line of credit facility restrictive covenant after acquisitions.

+ References

No definition available.

+ Details

Name:	tnc_LineOfCreditFacilityCovenantRestrictionMaximumLeverageAfterAcquisitions
Namespace Prefix:	tnc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum leverage ratio allowed under line of credit facility restrictive covenant after the effect of paying dividends or repurchasing the company's stock.

+ References

No definition available.

+ Details

Name:	tnc_LineOfCreditFacilityCovenantRestrictionMaximumLeverageAfterPayingDividendsOrRepuchasingStock
Namespace Prefix:	tnc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum Line of credit facility restrictive covenant on EBITDA to interest expense ratio.

+ References

No definition available.

+ Details

Name:	tnc_LineOfCreditFacilityCovenantRestrictionMinimumEbitdaToInterestExpense
Namespace Prefix:	tnc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of additional margin spread added to Federal Funds interest rate on Alternalte Base Rate ("ABR") borrowings.

+ References

No definition available.

+ Details

Name:	tnc_LineOfCreditFacilityInterestRateMarginSpreadAddedToFederalFundsRate
Namespace Prefix:	tnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of additional margin spread added to LIBOR one month interest rate on Alternate Base Rate borrowings.

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum amount of additional margin spread added to LIBOR one month interest rate on Alternate Base Rate borrowings.

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The minimum fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum amount of additional margin spread added to LIBOR one month interest rate on Alternate Base Rate borrowings.

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of all domestic and first tier foreign subsidiaries pledged as collateral under the credit agreement.

+ References

No definition available.

+ Details

Name:	tnc_LineOfCreditFacilityPercentageCollateralInStocks
Namespace Prefix:	tnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum restrictions on the entity's ability to pay dividends and repurchases of common stock based on the company's leverage ratio after giving effect to such payments.

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The minimum restrictions on the entity's ability to pay dividends and repurchases of common stock based on the company's leverage ratio after giving effect to such payments.

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum interest rate spread added to adjusted LIBOR rate based on leverage ration on Eurocurrency borrowings (in hundreths).

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
Data Type:	num:percentItemType
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Period Type:	duration

- Definition

Minimum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings (in hundreths).

+ References

No definition available.

+ Details

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Namespace Prefix:	tnc_
Data Type:	num:percentItemType
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Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Latest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Earliest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(3))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:stringItemType
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Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Details

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Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	duration

Debt Part 2 (Details) In Thousands, unless otherwise specified	12 Months Ended							3 Months Ended	12 Months Ended				3 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 JPMorgan Chase Bank, National Association USD ($)	Dec. 31, 2014 Amendment No. 1 to the 2011 Credit Agreement Effective April 25 , 2013	Dec. 31, 2014 Prudential Investment Management, Inc. Private Shelf Agreement USD ($)	Dec. 31, 2014 Amended Prudential Investment Management USD ($)	Mar. 31, 2014 Series A Notes USD ($)	Dec. 31, 2014 Series A Notes USD ($)	Dec. 31, 2014 Series B Notes USD ($)	Dec. 31, 2014 Royal Bank of Scotland Citizens, N.A. USD ($)	Dec. 31, 2014 Royal Bank of Scotland Citizens, N.A. EUR (€)	Mar. 31, 2014 HSBC Bank (China) Company Limited, Shanghai Branch USD ($)	Dec. 31, 2014 HSBC Bank (China) Company Limited, Shanghai Branch USD ($)
Line of Credit Facility
Expiration date				May 05, 2016	Mar. 01, 2018		Jul. 24, 2015
Line of Credit Facility, Current Borrowing Capacity				$ 125,000
Maximum borrowing capacity				187,500		80,000					2,421	2,000		5,000
Additional borrowing capacity available				62,500
Sublimit on borrowings by foreign subsidiaries				100,000
Minimum commitment fee percentage				0.25%	0.20%
Maximum commitment fee percentage				0.40%	0.35%
Minimum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings				1.50%	1.30%
Maximum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings				2.10%	1.90%
Interest rate spread added to the federal funds rate on Alternate Base Rate borrowings				0.50%	0.50%
Interest rate spread added to LIBOR rate for one month on Alternate Base Rate borrowings				1.00%	1.00%
Minimum interest rate spread added to LIBOR rate on Alternate Base Rate borrowings				0.50%	0.30%
Maximum interest rate spread added to LIBOR rate on Alternate Base Rate borrowings				1.10%	0.90%
Percentage collateral in stock of certain subsidiaries				65.00%
Covenant restriction, Maximum indebtedness to EBITDA				3.00 to 1			3.00 to 1
Covenant restriction, Minimum EBITDA to interest expense				3.50 to 1
Covenant restriction, Maximum leverage after paying dividends or repuchasing stock				2.00 to 1			2.00 to 1
Restriction on dividends and repurchases of common stock, Minimum				50,000		12,000	50,000
Restriction on dividends and repurchases of common stock, Maximum				75,000		40,000	75,000
Covenant restriction, Maximum leverage after acquisitions				2.75 to 1			2.75 to 1
Covenant restriction, Maximum level that can be paid for acquisitions				25,000			25,000
Weighted average interest rate at end of period				1.46%
Face amount									8,000	10,000
Interest rate, Stated percentage									4.00%	4.10%
Payment Terms									seven-year	10-year
Maturity date range, Start									Mar. 11, 2014	Jun. 01, 2015
Maturity date range, End									Mar. 11, 2018	Jun. 01, 2021
Repayments of Long-term Debt								2,000
Payments of Short-term Debt	1,500us-gaap_RepaymentsOfShortTermDebt	0us-gaap_RepaymentsOfShortTermDebt	0us-gaap_RepaymentsOfShortTermDebt										1,500
Outstanding Borrowings				$ 10,000			$ 18,000				$ 0			$ 0