Note 10 - Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2017			2016			2017			2016
Income tax expense	$	10,529		$	797		$	65,751		$	19,109
Effective income tax rate		40.7	%		136.5	%		40.6	%		42.0	%