Note 17 - Quarterly Results of Operations (Unaudited) (Details Textual) - USD ($) $ in Thousands	3 Months Ended
Jun. 30, 2015	Mar. 31, 2015
Reduction in Insurance and Claims Expense	$ 3,600
Domestic Tax Authority [Member]
Income Tax Credits and Adjustments		$ 4,700

A credit or adjustment for government or taxing authority authorized decrease in taxes owed as a result of meeting certain tax policy conditions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Name:	us-gaap_IncomeTaxCreditsAndAdjustments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration