Debt instrument prepayment in excess of cash flow percentage.

No definition available.

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Period Type:	duration

- Definition

Financial covenant, interest coverage ratio.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Financial covenant leverage ratio.

+ References

No definition available.

+ Details

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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of credit facility date of last required payment.

+ References

No definition available.

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility periodic payment percentage of principal.

+ References

No definition available.

+ Details

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

- Definition

Working capital.

+ References

No definition available.

+ Details

Name:	tnet_WorkingCapital
Namespace Prefix:	tnet_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

- Definition

The 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:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the first payment under the line of credit must be paid, in CCYY-MM-DD format.

+ 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

+ Details

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

- Definition

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

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityFrequencyOfPayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ 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 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ 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=56944662&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

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Notes Payable and Borrowings under Capital Leases - Additional Information (Details)	1 Months Ended	3 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jul. 31, 2014 USD ($)
Minimum
Debt Instrument [Line Items]
Debt instrument covenant interest coverage ratio		3.50
Maximum
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio		4.25
First lien credit facility
Debt Instrument [Line Items]
Unused portion of the revolving credit facility		$ 59,500,000
First lien credit facility \| Tranche A term loans
Debt Instrument [Line Items]
Line of credit facility				$ 375,000,000
Credit facility, maturity date		Jul. 09, 2019
Interest rate, increase (decrease)		0.25%
First lien credit facility \| Tranche A term loans \| Installment period 1
Debt Instrument [Line Items]
Frequency of payment		Quarterly
Beginning date of payment		Dec. 31, 2014
Ending date of payment		Dec. 31, 2016
Percentage of principal amount to be paid		5.00%
First lien credit facility \| Tranche A term loans \| Installment period 2
Debt Instrument [Line Items]
Frequency of payment		Quarterly
Beginning date of payment		Dec. 31, 2016
Ending date of payment		Dec. 31, 2018
Percentage of principal amount to be paid		7.50%
First lien credit facility \| Tranche A term loans \| Installment period 3
Debt Instrument [Line Items]
Frequency of payment		Quarterly
Beginning date of payment		Dec. 31, 2018
Ending date of payment		Jun. 30, 2019
Percentage of principal amount to be paid		10.00%
First lien credit facility \| Tranche A term loans \| LIBOR
Debt Instrument [Line Items]
Margin for term loans		2.75%
First lien credit facility \| Tranche A term loans \| Prime lending rate
Debt Instrument [Line Items]
Margin for term loans		1.75%
First lien credit facility \| Tranche B term loans
Debt Instrument [Line Items]
Line of credit facility				200,000,000
Credit facility, maturity date		Jul. 09, 2017
Commitment fee percentage		0.50%
Percentage of prepayment in excess cash flow		50.00%
Frequency of payment		Quarterly
Percentage of principal amount to be paid		1.00%
Repayments of lines of credit	$ 25,000,000
Lien of credit amount amortized	$ 400,000
First lien credit facility \| Tranche B term loans \| Prepayment condition 1
Debt Instrument [Line Items]
Percentage of prepayment in excess cash flow		25.00%
First lien credit facility \| Tranche B term loans \| Prepayment condition 2
Debt Instrument [Line Items]
Percentage of prepayment in excess cash flow		0.00%
First lien credit facility \| Tranche B term loans \| Minimum
Debt Instrument [Line Items]
Commitment fee percentage		0.375%
First lien credit facility \| Tranche B term loans \| Minimum \| Prepayment condition 1
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio		3.00
First lien credit facility \| Tranche B term loans \| Maximum
Debt Instrument [Line Items]
Working capital less than $10 million		$ 10,000,000
First lien credit facility \| Tranche B term loans \| Maximum \| Prepayment condition 1
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio		3.75
First lien credit facility \| Tranche B term loans \| Maximum \| Prepayment condition 2
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio		3.00
First lien credit facility \| Tranche B term loans \| LIBOR
Debt Instrument [Line Items]
Margin for term loans		2.75%
First lien credit facility \| Tranche B term loans \| Prime lending rate
Debt Instrument [Line Items]
Margin for term loans		1.75%
First lien credit facility \| Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility		$ 75,000,000		$ 75,000,000
Credit facility, maturity date		Jul. 09, 2019
First lien credit facility \| Letter of credit
Debt Instrument [Line Items]
Line of credit facility		$ 40,000,000
First lien credit facility \| Swingline
Debt Instrument [Line Items]
Line of credit facility		$ 10,000,000
First lien credit facility \| Tranche B-1 Term Loan
Debt Instrument [Line Items]
Prepayment of debt			$ 12,700,000