Note 11 - Subsequent Event (Details) (Subsequent Event [Member], GE Capital [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
Jul. 11, 2013	Jun. 30, 2013
Subsequent Event [Member] \| GE Capital [Member]
Note 11 - Subsequent Event (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 750.0	$ 600.0
Debt Instrument, Basis Spread on Variable Rate	2.03%
Line of Credit Facility, Commitment Fee Percentage	0.35%
Written Notice Period for Termination of Credit Agreement	120 days

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.

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

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