Accumulated Other Comprehensive Loss - Narrative (Details) (Interest Rate Swap [Member], USD $)	1 Months Ended
Aug. 31, 2010	Jul. 31, 2010
Interest Rate Swap [Member]
Derivative [Line Items]
Debt instrument, face amount		$ 250,000,000
Debt instrument, term		10 years
Payment to settle interest rate swap agreement	$ 8,700,000

The net cash outflow or inflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 27

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3581-108585

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