5. (LOSS) EARNINGS PER SHARE

(Loss) earnings per share is computed as follows (in thousands, except per share data):

	Year Ended December 31,
	2017								2016								2015
	Net Loss			Shares		Per Share Amount			Net Loss			Shares		Per Share Amount			Net Income		Shares		Per Share Amount
Basic (loss) earnings per share	$	(202,386	)		85,811	$	(2.36	)	$	(12,531	)		84,925	$	(0.15	)	$	49,133		85,860	$	0.57
Effect of dilutive incentive-based awards					—								—							121
Diluted (loss) earnings per share	$	(202,386	)		85,811	$	(2.36	)	$	(12,531	)		84,925	$	(0.15	)	$	49,133		85,981	$	0.57

In accordance with the Earnings Per Share Topic of the ASC, basic (loss) earnings per share is computed by dividing net (loss) income by the weighted average number of shares of common stock outstanding during the period (excluding treasury stock and unvested restricted stock). The shares of unvested restricted stock are eligible to receive dividends; however, dividend rights will be forfeited if the award does not vest. Accordingly, only vested shares of outstanding restricted stock are included in the calculation of basic earnings per share. The weighted average number of repurchased shares during the period, if any, which are held as treasury stock, are excluded from shares of common stock outstanding.

Diluted (loss) earnings per share is determined using the treasury stock method based on the dilutive effect of unvested restricted stock and certain shares of common stock that are issuable upon exercise of stock options. During the years ended December 31, 2017 and 2016, there were approximately 5,090,000 and 4,807,000 potentially dilutive shares of common stock excluded from the computation of diluted loss per share as their effect would have been anti-dilutive due to the Company’s net loss in those periods, respectively. During the year ended December 31, 2015, there were approximately 1,879,000 anti-dilutive shares of common stock excluded from the computation of diluted earnings per share.

The Company’s outstanding performance-vesting restricted share awards are considered contingently issuable shares and are excluded from the calculation of diluted earnings per share until the performance measure criteria is met as of the end of the reporting period. For the years ended December 31, 2017, 2016 and 2015, approximately 78,000, 13,000 and 19,000 performance-vesting restricted share awards had met their performance criteria as of December 31, 2017, 2016 and 2015, respectively. See further discussion in Note 19–Equity-Based Compensation.