Weighted Average Shares Outstanding

12 Months Ended

Dec. 31, 2014

Weighted Average Number of Shares Outstanding Reconciliation [Abstract]

Weighted Average Shares Outstanding

Weighted Average Shares Outstanding

A reconciliation of the weighted average shares outstanding used in calculating basic and diluted net income (loss) per share in the accompanying consolidated statements of operations is as follows (in thousands):

Years Ended December 31,	2014	2013	2012
Weighted average shares outstanding:
Weighted average common stock outstanding	39,096	38,803	38,689
Less: weighted average unvested restricted stock outstanding	—	—	242
Total basic weighted average shares outstanding	39,096	38,803	38,447
Diluted weighted average shares outstanding:
Weighted average common stock outstanding, basic	39,096	38,803	38,447
Effect of dilutive securities:
Common stock options and restricted stock units1	699	—	629
Total weighted average shares outstanding assuming dilution	39,795	38,803	39,076

¹Due to the net loss for the year ended December 31, 2013, restricted stock units and common stock options representing approximately 862,000 have been excluded from the number of shares used in calculating diluted net loss per share, as their inclusion would be antidilutive.