Share-based compensation	9 Months Ended
Share-based compensation	Sep. 30, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-based compensation	8. Share-based compensation All share-based compensation awards are measured at the grant date, based on the estimated fair value of the award, and recognized as expense in the condensed consolidated statements of operations over the requisite service period. The Company recognized $8.1 million and $12.2 million, respectively, of share-based compensation expense for the three and nine months ended September 30, 2016 and $1.9 million and $5.5 million, respectively, for the three and nine months ended September 30, 2015. On June 30, 2014, the Company granted 99,600 shares of performance-based vesting restricted stock to executive officers and certain employees. Vesting is based on achieving adjusted earnings targets in two consecutive rolling four quarter periods prior to December 31, 2017. As of September 30, 2016, the Company determined these performance-based awards were probable to vest, resulting in the recognition of $2.7 million of expense for the quarter ended September 30, 2016. Between June 30, 2015 and August 5, 2015, the Company granted 110,660 shares of performance-based vesting restricted stock, coupled with performance stock units (“PSUs”), to executive officers and certain employees. Vesting of the restricted stock is based on achieving adjusted earnings or return on invested capital targets as of and for any of the years ended December 31, 2016, 2017 or 2018. As of September 30, 2016, the Company determined these performance-based awards were probable to vest, resulting in the recognition of $2.4 million of expense for the quarter ended September 30, 2016. The PSUs, which represent the potential to receive additional shares of common stock in an amount up to 50% of the shares of restricted stock granted, are based on adjusted earnings and return on invested capital targets as of and for the year ended December 31, 2018. On July 1, 2016, the Company granted 96,245 market-based PSUs to executive officers and certain employees. The awards, if performance goals are achieved, will be settled in shares of common stock, with one share of common stock issued per PSU if targets are achieved at a 100% level. Awards may be achieved at a minimum level of 50% and a maximum level of 200%. The performance targets are based the Company’s stock achieving certain total shareholder return targets relative to specified index companies during a 3-year performance period beginning on July 1, 2016. As of September 30, 2016, approximately $0.5 million of expense has been recognized for these contingent performance units. During the three months ended September 30, 2016 and 2015, there were 181,235 and 43,326 shares, respectively, of common stock issued related to stock purchase plan issuances, stock option exercises and the vesting of restricted stock awards. During the nine months ended September 30, 2016 and 2015, there were 710,026 and 271,166 shares, respectively, of common stock issued related to stock purchase plan issuances, stock option exercises and the vesting of restricted stock awards.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.