Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2017

Summary of Significant Accounting Policies

Reconciliation of basic weighted average shares outstanding to diluted weighted average shares outstanding

The following is a reconciliation of the Company’s basic weighted average shares outstanding to diluted weighted average shares outstanding during the periods presented (in thousands): 

	Three Months Ended June 30,		Six Months Ended June 30,
	2016	2017	2016	2017
Basic weighted average number of shares outstanding	281,786	315,401	279,418	315,179
Add: Dilutive effect of non-vested restricted stock units	—	—	—	710
Add: Dilutive effect of outstanding stock options	—	—	—	—
Add: Dilutive effect of performance stock units	—	—	—	38
Diluted weighted average number of shares outstanding	281,786	315,401	279,418	315,927
Weighted average number of outstanding equity awards excluded from calculation of diluted earnings per common share(1):
Non-vested restricted stock and restricted stock units	6,982	5,105	6,862	1,596
Outstanding stock options	706	679	713	681
Performance stock units	724	1,213	471	896

(1)   The potential dilutive effects of these awards were excluded from the computation of earnings (loss) per common share—assuming dilution because the inclusion of these awards would have been anti-dilutive.  When the Company incurs a net loss, all outstanding equity awards are excluded from the calculation of diluted loss per common share because the inclusion of such awards would be anti-dilutive.