Weighted Average Shares Outstanding

12 Months Ended

Dec. 31, 2012

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,	2012	2011	2010
Weighted average shares outstanding:
Weighted average common stock outstanding	38,689	38,677	38,750
Less: weighted average unvested restricted stock outstanding	242	560	930
Total basic weighted average shares outstanding	38,447	38,117	37,820
Diluted weighted average shares outstanding:
Weighted average common stock outstanding, basic	38,447	38,117	37,820
Effect of dilutive securities:
Common stock options and restricted stock units1	629	356	—
Total weighted average shares outstanding assuming dilution	39,076	38,473	37,820

¹Due to the net loss for the year ended December 31, 2010, common stock options and restricted stock units representing 161,000 shares were excluded from the number of shares used in calculating diluted loss per share for that period, as their inclusion would be antidilutive.