Borrowings.

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- Definition

Line of Credit Facility Term.

+ Details

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- Definition

Stand By Letter Of Credit Value.

+ Details

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- 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

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Balance Type:	credit
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- Definition

Reflects when the credit facility terminates, which may be presented in a variety of ways (year, month and year, day, month and year, quarter).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
-Paragraph 2, 4

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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- Definition

Increase for additional borrowings on the credit facility during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph f
-Article 4

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Balance Type:	credit
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- Definition

The effective interest rate at the end of the reporting period.

+ 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

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- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

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Borrowings (Details Textuals 1) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 31, 2011 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2011 GBP (£)	Dec. 31, 2010 USD ($)	Feb. 28, 2009
Borrowings (Textuals) [Abstract]
Line of Credit Facility Interest Rate Description		(i) the federal funds rate plus a margin equal to 0.50%, (ii) Bank of America’s prime rate and (iii) the London Interbank Offered Rate ("LIBOR") plus a margin equal to 1.00%); or LIBOR plus a margin equal to 0.60%, in each case for interest periods of 1, 2, 3 or 6 months as selected by the Company	(i) the federal funds rate plus a margin equal to 0.50%, (ii) Bank of America’s prime rate and (iii) the London Interbank Offered Rate ("LIBOR") plus a margin equal to 1.00%); or LIBOR plus a margin equal to 0.60%, in each case for interest periods of 1, 2, 3 or 6 months as selected by the Company
Total principal amount outstanding under the revolving credit facility		$ 248.0		$ 240.0
Term of the credit facility with Bank of America, Expiry date		February 2012	February 2012
Stand By Letter Of Credit Value			1.2
Additional borrowings under revolving credit facility	$ 10.0
Approximate Interest rate payable on outstanding amount		0.79%	0.79%
Term of senior secured revolving credit facility					1 year