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Note 9 - Income Tax Reconcilliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Computed "expected" income tax expense	$ 22,368	$ 11,404	$ 4,462
State income taxes, net of federal income tax effect	2,237	1,075	421
Per diem allowances	2,329	2,304	2,422
Tax contingency accruals	1,599	(104)	(496)
Valuation allowance, net	218	18	684
Tax credits	(7,151)	(112)	(250)
Other, net	222	189	260
	$ 21,822	$ 14,774	$ 7,503

X

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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