Share-based Compensation (Notes)

6 Months Ended

Jun. 30, 2013

Share-based Compensation [Abstract]

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

Share-based Compensation

During the six months ended June 30, 2013, the Company granted 82 stock options, 48 shares of restricted stock and restricted stock units, 19 performance units and 22 leveraged restricted share units. Non-employee directors received 3 stock awards with a fair value of $188. During the six months ended June 30, 2013, participants in the Company's stock option plans exercised options to purchase 280 shares of the Company's common stock.

Stock options vest ratably over a four year period. Restricted stock and restricted stock units generally vest ratably over a three year period, and performance units and leveraged restricted share units vest at the end of a three-year performance period based on the achievement of certain performance and market conditions. During the six months ended June 30, 2013, 80 restricted stock and restricted stock units vested while 1 restricted stock and restricted stock units were forfeited.

Share-based compensation expense was $2,511 and $5,075 for the three and six months ended June 30, 2013, respectively, and $1,676 and $4,181 for the three and six months ended June 30, 2012, respectively. As of June 30, 2013, total share-based compensation of $13,146 is expected to be recognized over the weighted-average period of approximately 2.4 years assuming units are earned at their maximum payout potential.