Subsequent Events (Details) (Interest Rate Swap Agreements [Member], USD $) In Millions, unless otherwise specified	Apr. 05, 2012
Interest Rate Swap Agreements [Member]
Subsequent Event [Line Items]
Aggregate notional amount	$ 100

Aggregate notional amount of all derivatives. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

Name:	us-gaap_NotionalAmountOfDerivatives
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant