Note 12 - Debt Obligations (Details) - Summary of Interest Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of Interest Expense [Abstract]
Interest expense	$ 27,920us-gaap_InterestExpenseBorrowings	$ 26,016us-gaap_InterestExpenseBorrowings	$ 31,719us-gaap_InterestExpenseBorrowings
Capitalized interest expense	(9,250)us-gaap_InterestPaidCapitalized	(9,858)us-gaap_InterestPaidCapitalized	(15,604)us-gaap_InterestPaidCapitalized
Interest expense, net	$ 18,670us-gaap_InterestExpense	$ 16,158us-gaap_InterestExpense	$ 16,115us-gaap_InterestExpense

Amount of the cost of borrowed funds accounted for as interest expense.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.9)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 9

-Article 9

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