Note 2 - New Accounting Pronouncements (Details Textual) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Reclassification of Debt Issuance Costs [Member] \| December 2015 [Member]
Prior Period Reclassification Adjustment	$ 19.1
Reclassification of Debt Issuance Costs [Member]
Current Period Reclassification Adjustment	17.7
Debt Issuance Costs, Line of Credit Arrangements, Net	$ 2.0	$ 1.0

Amount, after accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section S45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68176171&loc=SL68176184-208336

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