Note 7 - Impairments (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Asset Impairment Charges	$ 93,266	$ 45,464	$ 217,858
Income Tax Expense (Benefit)	(72,545)	(60,230)	(22,438)
Equity Method Investments [Member]
Impairment of Real Estate	15,000	22,200	54,500
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member] | MEXICO
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(92,900)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax			(5,800)
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member] | MEXICO | Equity in Income of Joint Ventures [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			47,300
Before Income Tax Benefit and Noncontrolling Interest [Member]
Asset Impairment Charges	93,300	30,300	33,300
Income Tax Benefit Amount [Member]
Income Tax Expense (Benefit)	21,100	5,400	6,100
Noncontrolling Interest Amount [Member]
Income (Loss) Attributable to Noncontrolling Interest	$ 400	$ 5,600	$ 300