15. Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The calculation of basic and diluted net income per share for the three and nine months ended September 30, 2015 and 2014 was as follows (in thousands, except per share amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Basic net income per share
Numerator:
Net income	$	349,318	$	89,833	$	382,286	$	202,646
Denominator:
Weighted-average common shares outstanding	100,906		100,197		100,713		99,981
Diluted net income per share
Denominator:
Weighted-average common shares outstanding	100,906		100,197		100,713		99,981
Effect of restricted and performance stock units and stock purchase plan shares	1,393		1,218		1,132		1,705
Weighted-average shares used in computing diluted net income per share	102,299		101,415		101,845		101,686

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Per share information - basic:
Net income per share	$	3.46	$	0.90	$	3.80	$	2.03
Per share information - diluted:
Net income per share	$	3.41	$	0.89	$	3.75	$	1.99

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table summarizes the potential shares of common stock that were excluded from the computation of diluted net income per share for the three and nine months ended September 30, 2015 and 2014 as they would have had an anti-dilutive effect (in thousands):

	Three Months Ended September 30,		Nine Months Ended September 30,
	2015	2014	2015	2014
Anti-dilutive shares	46	46	64	87