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Note 13 - Income Taxes - Income Tax Provision (Benefit) From Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
	$ 10,138	$ 12,341	$ 13,355
Income tax provision	86,465	79,705	74,955
Continuing Operations [Member]
Federal	68,088	58,408	56,342
State	13,884	14,572	7,944
	81,972	72,980	64,286
Federal	4,893	6,046	10,433
State	(400)	679	236
	4,493	6,725	10,669
Income tax provision	$ 86,465	$ 79,705	$ 74,955

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