Note 18 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Income Tax Expense (Benefit)	$ 47,248	$ 42,543
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	129,868	$ 115,204
Deferred Tax Assets, Operating Loss Carryforwards	101,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	15,600
Deferred Tax Assets, Other	206,700
Unrecognized Tax Benefits	$ 12,800		$ 12,100
Earliest Tax Year [Member]
Open Tax Year	2012
Latest Tax Year [Member]
Open Tax Year	2016
State and Local Net Operating Loss Carryforwards Limited to Shorter Carryforward Periods [Member]
Deferred Tax Assets, Gross	$ 328,200
Deferred Tax Assets, Valuation Allowance	2,500
Subject to 382 Limitations [Member]
Deferred Tax Assets, Operating Loss Carryforwards	15,300
Not Limited by Section 382 [Member]
Deferred Tax Assets, Operating Loss Carryforwards	$ 5,200