Note 15 - Supplemental Disclosures to Consolidated Statements of Cash Flows (Details) - Supplemental Disclosures of Cash Flows Information (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash paid during the period for:
Interest	$ 141,527	$ 128,061	$ 122,352
Income taxes	7,297	3,792	206
Supplemental Disclosure of Noncash Activities:
Increase in inventory in connection with purchase or consolidation of joint ventures			66,323
Liabilities assumed in connection with acquisition	3,659	4,983
Changes in inventories not owned	14,074	1,171	5,139
Changes in liabilities from inventories not owned	$ 14,074	$ 1,171	$ 5,139