Debt Instrument Basis Spread On Variable Rate Increase Interval Period

No definition available.

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- Definition

Debt Instrument, Step Up in Basis Spread On Variable Rate

+ References

No definition available.

+ Details

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- Definition

Line of Credit Facility, Increase to Maximum Borrowing Capacity, Accordion Provision

+ References

No definition available.

+ Details

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- Definition

Maximum Loan To Value Ratio

+ References

No definition available.

+ Details

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- 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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- Definition

The average effective interest rate during the reporting period.

+ 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 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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

+ Details

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- Definition

Minimum contractual interest rate for funds borrowed, under the debt agreement.

+ 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 210.5-02.22(a)(2))

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

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- 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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- Definition

Period of time between issuance and maturity of debt instrument, 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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Period Type:	duration

- Definition

Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

+ References

No definition available.

+ Details

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- 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 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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

+ Details

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- Definition

Date the credit facility terminates, 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

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- 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

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

Reference 1: 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(a))

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

Reference 2: 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

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Debt - Cabot Senior Revolving Credit Facility and Senior Secured Bridge Facility (Detail) $ in Thousands				3 Months Ended		9 Months Ended
	Jun. 01, 2015 USD ($)	Feb. 05, 2015 USD ($)	Feb. 05, 2015 GBP (£)	Sep. 30, 2015 USD ($)	Sep. 30, 2014	Sep. 30, 2015 USD ($)	Sep. 30, 2014	Jun. 01, 2015 GBP (£)	Feb. 05, 2015 GBP (£)	Dec. 31, 2014 USD ($)	Jun. 28, 2013 USD ($)	Jun. 28, 2013 GBP (£)	Sep. 20, 2012 USD ($)	Sep. 20, 2012 GBP (£)
Debt Instrument [Line Items]
Credit facility, outstanding amount				$ 576,000		$ 576,000				$ 505,000
Weighted average interest rate (percent)				3.25%	2.95%	3.12%	2.92%
Debt instrument, stated interest rate, minimum						0.00%
Senior secured notes				$ 32,500		$ 32,500				43,750
Cabot Senior Secured Notes [Member]
Debt Instrument [Line Items]
Senior secured notes				1,045,143		$ 1,045,143				1,076,952
Cabot Credit Agreement [Member]
Debt Instrument [Line Items]
Revolving credit facility													$ 82,700	£ 50,000,000.0
Cabot Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility		$ 298,100							£ 195,000,000.0		$ 140,600	£ 85,000,000.0
Line of credit facility, increase to maximum borrowing capacity, accordion provision \| £									£ 55,000,000.0
Debt issuance cost		$ 4,100	£ 2,700,000
Debt instrument, term						5 years
Line of credit facility expiration date						Sep. 01, 2017
Basis spread on variable rate						3.50%
Maximum loan to value ratio						0.75%
Credit facility, outstanding amount				$ 242,751		$ 242,751				86,368
Weighted average interest rate (percent)				3.89%	4.55%	3.87%	4.36%
Cabot Credit Facility [Member] \| Super Senior Loan [Member]
Debt Instrument [Line Items]
Maximum loan to value ratio						25.00%
Senior Secured Bridge Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility \| £								£ 90,000,000.0
Debt issuance cost	$ 1,400
Debt instrument, term	1 year
Debt instrument, stated interest rate, minimum	1.00%
Senior Secured Bridge Facility [Member] \| Cabot Senior Secured Notes [Member]
Debt Instrument [Line Items]
Senior secured notes				$ 136,323		$ 136,323				$ 0
Senior Secured Bridge Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	6.00%
Step up in basis spread on variable rate (percent)	0.50%
Increased basis spread on variable rate, interval period	3 months