The following table sets forth the computation of basic and diluted earnings per common share (dollars in thousands, except per share amounts):



	Six Months Ended		Fiscal Year Ended
	January 27, 2018		July 29, 2017		July 30, 2016		July 25, 2015
Net income available to common stockholders (numerator)	$	68,835	$	157,217	$	128,740	$	84,324

Weighted-average number of common shares (denominator)	31,059,140		31,351,367		32,315,636		34,045,481

Basic earnings per common share	$	2.22	$	5.01	$	3.98	$	2.48

Weighted-average number of common shares	31,059,140		31,351,367		32,315,636		34,045,481
Potential shares of common stock arising from stock options, and unvested restricted share units⁽¹⁾	778,411		633,364		800,119		981,207
Potential shares of common stock issuable on conversion of 0.75% convertible senior notes due 2021⁽²⁾	217,394		—		—		—
Total shares-diluted (denominator)	32,054,945		31,984,731		33,115,755		35,026,688

Diluted earnings per common share	$	2.15	$	4.92	$	3.89	$	2.41

Anti-dilutive weighted shares excluded from the calculation of earnings per common share:
Stock-based awards	93,117		73,830		65,514		103,896
0.75% convertible senior notes due 2021	4,788,340		5,005,734		5,005,734		—
Warrants	5,005,734		5,005,734		5,005,734		—
Total	9,887,191		10,085,298		10,076,982		103,896

⁽¹⁾ As discussed in Note 1, Basis of Presentation and Accounting Policies, the Company has adopted ASU 2016-09. The amended guidance changed the treatment of windfalls (or shortfalls) arising from the vesting and exercise of share-based awards. Prior to ASU 2016-09, these amounts were recorded as an adjustment to additional paid-in capital. With the adoption of ASU 2016-09, these amounts are now included in the Company’s provision for income taxes. Because windfalls are no longer recognized in additional paid-in capital, the amount is excluded from the hypothetical proceeds used to repurchase shares when computing diluted earnings per common share under the treasury stock method. As a result of the amended guidance, diluted shares increased by approximately 177,575 shares during the six months ended January 27, 2018.