Income (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Schedule of income (loss) amounts attributable to parent used to calculate basic and diluted income (loss) per share

Income amounts used to calculate basic and diluted income per share were as follows:

	Year Ended
	2017		2016		2015
Income from continuing operations	$	194,029	$	129,624	$	139,979
Net income from discontinued operations	—		—		21,163
Net income	$	194,029	$	129,624	$	161,142

Number of shares used to calculate basic and diluted income per share

The weighted average number of shares used to calculate basic and diluted income per share were as follows:

	Year Ended
	2017	2016	2015
Common stock:
Weighted average basic shares outstanding	244,179	262,209	323,018
Dilutive effect of stock options and restricted shares	8,110	4,503	5,707
Weighted average diluted shares outstanding	252,289	266,712	328,725