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Commitments and Contingencies - Letters of credit (Details) (Letter of Credit, USD $)					6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Restricted cash and cash equivalents	Dec. 31, 2013 Restricted cash and cash equivalents	Jun. 30, 2014 BNP Paribas	Jun. 30, 2014 Citibank	Jun. 30, 2014 J.P. Morgan	Jul. 09, 2014 Subsequent Event [Member] Citibank
Line of Credit Facility [Line Items]
Facility	$ 300,000,000				$ 100,000,000	$ 150,000,000	$ 50,000,000	$ 250,000,000
Notice period (Unused Facility Portion)					60 days	90 days	60 days
Letters of credit outstanding	128,000,000	127,300,000
Letters of credit outstanding as percentage of total facility	42.70%	42.40%
Cash and cash equivalents pledged as security			$ 128,400,000	$ 100,600,000

X

- Definition

Line of Credit Facility, Amount Outstanding, As A Percentage of Maximum Borrowing Capacity

+ References

No definition available.

+ Details

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

X

- Definition

Termination Notice Period For Line of Credit Facilities

+ References

No definition available.

+ Details

Name:	tpre_TerminationNoticePeriodForLineofCreditFacilities
Namespace Prefix:	tpre_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

X

- Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

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

X

- Definition

The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for letter of credit arrangements, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 50

-Paragraph 1A

-Subparagraph (b)(1)(i)

-URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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