Note 21. Net (Loss) Income Per Share (Tables)

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The calculation of basic and diluted net (loss) income per share for the years ended December 31, 2016, 2015, and 2014 was as follows (in thousands, except per share amounts):

	2016			2015		2014
Basic net (loss) income per share
Numerator:
Net (loss) income	$	(357,964	)	$	546,421	$	395,964
Denominator:
Weighted-average common shares outstanding	102,866			100,886		100,048
Diluted net (loss) income per share
Denominator:
Weighted-average common shares outstanding	102,866			100,886		100,048
Effect of restricted and performance stock units and stock purchase plan shares	—			929		1,595
Weighted-average shares used in computing diluted net (loss) income per share	102,866			101,815		101,643
Net (loss) income per share:
Basic	$	(3.48	)	$	5.42	$	3.96
Diluted	$	(3.48	)	$	5.37	$	3.90

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

The following table summarizes the potential shares of common stock that were excluded from the computation of diluted net income per share for the years ended December 31, 2016, 2015, and 2014 as they would have had an anti-dilutive effect (in thousands):

	2016	2015	2014
Anti-dilutive shares	753	48	70