Stock-Based Compensation	9 Months Ended
Oct. 28, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	NOTE 15—STOCK-BASED COMPENSATION The Company estimates the value of equity grants based upon an option-pricing model and recognizes this estimated value as compensation expense over the vesting periods. The Company recognizes expense associated with performance-based awards when it becomes probable that the performance condition will be met. Once it becomes probable that an award will vest, the Company recognizes compensation expense equal to the number of shares which are probable to vest multiplied by the fair value of the related shares measured at the grant date. Stock-based compensation expense is included in selling, general and administrative expenses on the condensed consolidated statements of operations. The Company recorded stock-based compensation expense of $6.7 million and $7.4 million during the three months ended October 28, 2017 and October 29, 2016, respectively. The Company recorded stock-based compensation expense of $42.9 million and $21.7 million during the nine months ended October 28, 2017 and October 29, 2016, respectively. No stock-based compensation cost has been capitalized in the accompanying condensed consolidated financial statements. 2012 Stock Incentive Plan and 2012 Stock Option Plan As of October 28, 2017, 8,837,586 options were outstanding with a weighted-average exercise price of $50.20 per share and 6,318,980 options were vested with a weighted-average exercise price of $51.96 per share. The aggregate intrinsic value of options outstanding, options vested or expected to vest, and options exercisable as of October 28, 2017 was $323.7 million, $283.8 million, and $220.6 million, respectively. Stock options exercisable as of October 28, 2017 had a weighted-average remaining contractual life of 6.37 years. As of October 28, 2017, the total unrecognized compensation expense related to unvested options was $26.8 million, which is expected to be recognized on a straight-line basis over a weighted-average period of 3.33 years. As of October 28, 2017, the Company had 825,307 restricted stock units outstanding with a weighted-average grant date fair value of $52.20 per share. During the three months ended October 28, 2017, 18,590 restricted stock units vested with a weighted-average grant date and vest date fair value of $73.95 per share and $73.06 per share, respectively. During the nine months ended October 28, 2017, 264,843 restricted stock units vested with a weighted-average grant date and vest date fair value of $59.11 per share and $54.71 per share, respectively. As of October 28, 2017, there was $22.5 million of total unrecognized compensation expense related to unvested restricted stock and restricted stock units which is expected to be recognized over a weighted-average period of 3.26 years. Chairman and Chief Executive Officer Option Grant On May 2, 2017, the Company’s Board of Directors granted Mr. Friedman an option to purchase 1,000,000 shares of the Company’s common stock with an exercise price equal to $50 per share. The option contains dual-condition restrictions consisting of both time-based service restrictions over four years and performance-based restrictions linked to achieving the Company’s common stock price objectives of $100, $125 and $150 per share. The option is fully vested on the date of grant but the shares underlying the option remain subject to transfer restrictions to the extent the performance-based and time-based requirements have not been met. The option resulted in a one-time non-cash stock compensation charge of $23.9 million in the nine months ended October 28, 2017. The Company did not record any expense related to this grant in the three months ended October 28, 2017. Time-Based Restrictions The time-based restrictions are measured over an initial four year service period from the date of the award and these restrictions will lapse at the end of each of these first four years at a rate of 250,000 shares per year if (i) Mr. Friedman remains employed at the end of such year, and (ii) the stock price goals have been achieved in such year as described further below. Performance-Based Restrictions The stock price objectives are measured each year and are set at prices for the Company’s common stock of $100, $125 and $150 per share. If all three stock price objectives are met in the first performance year, restrictions will lapse as to 250,000 shares in aggregate at the end of such year, with 83,333 shares tied to a $100 price per share, 83,333 shares tied to a $125 price per share and 83,334 shares tied to a $150 price per share. The same price performance tests are applied in the second year of performance such that restrictions will lapse for an additional 250,000 shares at the end of the second year and then again as to an additional 250,000 shares at the end of each of the third and fourth years so long as Mr. Friedman remains employed at the end of each year. To the extent that any of the price performance objectives is not reached within one of these first four performance years, the stock price objective can be achieved in any subsequent year until the 8th anniversary of the date of grant. 2012 Stock Incentive Plan Grant to Waterworks Associates On May 27, 2016, on the date of our acquisition of Waterworks, the Company granted stock options to certain Waterworks associates under the 2012 Stock Incentive Plan to purchase 322,784 shares of its common stock, with an exercise price of $33.54 per share, which is equal to the closing price of the Company’s common stock on the date of grant. These options are fully vested as of the date of grant but any shares issued upon exercise of such options will be subject to selling restrictions which are scheduled to lapse in five equal installments on the first, second, third, fourth and fifth anniversaries of the grant date. The fully vested options resulted in a one-time non-cash stock-based compensation charge of $3.7 million in the second quarter of fiscal 2016. Rollover Units In connection with the acquisition of Waterworks, $1.5 million rollover units in the Waterworks subsidiary (the “Rollover Units”) were recorded as part of the transaction. The Rollover Units are subject to the terms of the Waterworks LLC agreement, including redemption rights at an amount equal to the greater of (i) the $1.5 million remitted as consideration in the business combination or (ii) an amount based on the percentage interest represented in the overall valuation of the Waterworks subsidiary (the “Appreciation Rights”). The Appreciation Rights are measured at fair value and are subject to fair value measurements during the expected life of the Rollover Units, with changes to fair value recorded in the condensed consolidated statements of operations. The fair value of the Appreciation Rights is determined based on an option pricing method (“OPM”). The Company did not record any expense related to the Appreciation Rights during the three or nine months ended October 28, 2017 or October 29, 2016. As of both October 28, 2017 and January 28, 2017, the liability associated with the Rollover Units and related Appreciation Rights was $1.5 million, which is included in other non-current obligations on the condensed consolidated balance sheets. Profit Interests In connection with the acquisition of Waterworks, profit interests units in the Waterworks subsidiary (the “Profit Interests”) were issued to certain Waterworks associates. The Profit Interests are measured at their grant date fair value and expensed on a straight-line basis over their expected life, or five years. The Profit Interests are subject to fair value measurements during their expected life, with changes to fair value recorded in the condensed consolidated statements of operations. The fair value of the Profit Interests is determined based on an OPM. For the three and nine months ended October 28, 2017, the Company recorded $0.1 million and $0.3 million, respectively, related to the Profit Interests, which is included in selling, general and administrative expenses on the condensed consolidated statements of operations. For the three and nine months ended October 29, 2016 the Company recorded $0.1 million and $0.2 million, respectively, related to the Profit Interests. As of October 28, 2017 and January 28, 2017, the liability associated with the Profit Interests was $0.6 million and $0.3 million, respectively, which is included in other non-current obligations on the condensed consolidated balance sheets.

NOTE 15—STOCK-BASED COMPENSATION

The Company estimates the value of equity grants based upon an option-pricing model and recognizes this estimated value as compensation expense over the vesting periods. The Company recognizes expense associated with performance-based awards when it becomes probable that the performance condition will be met. Once it becomes probable that an award will vest, the Company recognizes compensation expense equal to the number of shares which are probable to vest multiplied by the fair value of the related shares measured at the grant date.

Stock-based compensation expense is included in selling, general and administrative expenses on the condensed consolidated statements of operations. The Company recorded stock-based compensation expense of $6.7 million and $7.4 million during the three months ended October 28, 2017 and October 29, 2016, respectively. The Company recorded stock-based compensation expense of $42.9 million and $21.7 million during the nine months ended October 28, 2017 and October 29, 2016, respectively. No stock-based compensation cost has been capitalized in the accompanying condensed consolidated financial statements.

2012 Stock Incentive Plan and 2012 Stock Option Plan

As of October 28, 2017, 8,837,586 options were outstanding with a weighted-average exercise price of $50.20 per share and 6,318,980 options were vested with a weighted-average exercise price of $51.96 per share. The aggregate intrinsic value of options outstanding, options vested or expected to vest, and options exercisable as of October 28, 2017 was $323.7 million, $283.8 million, and $220.6 million, respectively. Stock options exercisable as of October 28, 2017 had a weighted-average remaining contractual life of 6.37 years. As of October 28, 2017, the total unrecognized compensation expense related to unvested options was $26.8 million, which is expected to be recognized on a straight-line basis over a weighted-average period of 3.33 years.

As of October 28, 2017, the Company had 825,307 restricted stock units outstanding with a weighted-average grant date fair value of $52.20 per share. During the three months ended October 28, 2017, 18,590 restricted stock units vested with a weighted-average grant date and vest date fair value of $73.95 per share and $73.06 per share, respectively. During the nine months ended October 28, 2017, 264,843 restricted stock units vested with a weighted-average grant date and vest date fair value of $59.11 per share and $54.71 per share, respectively. As of October 28, 2017, there was $22.5 million of total unrecognized compensation expense related to unvested restricted stock and restricted stock units which is expected to be recognized over a weighted-average period of 3.26 years.

Chairman and Chief Executive Officer Option Grant

On May 2, 2017, the Company’s Board of Directors granted Mr. Friedman an option to purchase 1,000,000 shares of the Company’s common stock with an exercise price equal to $50 per share.

The option contains dual-condition restrictions consisting of both time-based service restrictions over four years and performance-based restrictions linked to achieving the Company’s common stock price objectives of $100, $125 and $150 per share. The option is fully vested on the date of grant but the shares underlying the option remain subject to transfer restrictions to the extent the performance-based and time-based requirements have not been met. The option resulted in a one-time non-cash stock compensation charge of $23.9 million in the nine months ended October 28, 2017. The Company did not record any expense related to this grant in the three months ended October 28, 2017.

Time-Based Restrictions

The time-based restrictions are measured over an initial four year service period from the date of the award and these restrictions will lapse at the end of each of these first four years at a rate of 250,000 shares per year if (i) Mr. Friedman remains employed at the end of such year, and (ii) the stock price goals have been achieved in such year as described further below.

Performance-Based Restrictions

The stock price objectives are measured each year and are set at prices for the Company’s common stock of $100, $125 and $150 per share. If all three stock price objectives are met in the first performance year, restrictions will lapse as to 250,000 shares in aggregate at the end of such year, with 83,333 shares tied to a $100 price per share, 83,333 shares tied to a $125 price per share and 83,334 shares tied to a $150 price per share.

The same price performance tests are applied in the second year of performance such that restrictions will lapse for an additional 250,000 shares at the end of the second year and then again as to an additional 250,000 shares at the end of each of the third and fourth years so long as Mr. Friedman remains employed at the end of each year.

To the extent that any of the price performance objectives is not reached within one of these first four performance years, the stock price objective can be achieved in any subsequent year until the 8th anniversary of the date of grant.

2012 Stock Incentive Plan Grant to Waterworks Associates

On May 27, 2016, on the date of our acquisition of Waterworks, the Company granted stock options to certain Waterworks associates under the 2012 Stock Incentive Plan to purchase 322,784 shares of its common stock, with an exercise price of $33.54 per share, which is equal to the closing price of the Company’s common stock on the date of grant. These options are fully vested as of the date of grant but any shares issued upon exercise of such options will be subject to selling restrictions which are scheduled to lapse in five equal installments on the first, second, third, fourth and fifth anniversaries of the grant date. The fully vested options resulted in a one-time non-cash stock-based compensation charge of $3.7 million in the second quarter of fiscal 2016.

Rollover Units

In connection with the acquisition of Waterworks, $1.5 million rollover units in the Waterworks subsidiary (the “Rollover Units”) were recorded as part of the transaction. The Rollover Units are subject to the terms of the Waterworks LLC agreement, including redemption rights at an amount equal to the greater of (i) the $1.5 million remitted as consideration in the business combination or (ii) an amount based on the percentage interest represented in the overall valuation of the Waterworks subsidiary (the “Appreciation Rights”). The Appreciation Rights are measured at fair value and are subject to fair value measurements during the expected life of the Rollover Units, with changes to fair value recorded in the condensed consolidated statements of operations. The fair value of the Appreciation Rights is determined based on an option pricing method (“OPM”). The Company did not record any expense related to the Appreciation Rights during the three or nine months ended October 28, 2017 or October 29, 2016. As of both October 28, 2017 and January 28, 2017, the liability associated with the Rollover Units and related Appreciation Rights was $1.5 million, which is included in other non-current obligations on the condensed consolidated balance sheets.

Profit Interests

In connection with the acquisition of Waterworks, profit interests units in the Waterworks subsidiary (the “Profit Interests”) were issued to certain Waterworks associates. The Profit Interests are measured at their grant date fair value and expensed on a straight-line basis over their expected life, or five years. The Profit Interests are subject to fair value measurements during their expected life, with changes to fair value recorded in the condensed consolidated statements of operations. The fair value of the Profit Interests is determined based on an OPM. For the three and nine months ended October 28, 2017, the Company recorded $0.1 million and $0.3 million, respectively, related to the Profit Interests, which is included in selling, general and administrative expenses on the condensed consolidated statements of operations. For the three and nine months ended October 29, 2016 the Company recorded $0.1 million and $0.2 million, respectively, related to the Profit Interests. As of October 28, 2017 and January 28, 2017, the liability associated with the Profit Interests was $0.6 million and $0.3 million, respectively, which is included in other non-current obligations on the condensed consolidated balance sheets.