Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2011

Share-based Compensation [Abstract]

Fair value of the restricted stock awards, restricted stock units and stock options

			Weighted-average
	Number		grant date		Aggregate		Vesting
	of shares		fair value		fair value		period
Common stock		28	$	32.54	$	920		—
Restricted stock awards		289		31.22		9,023	3-5 years
Restricted stock units		65		30.25		1,952	4 years
Stock options		179		7.36		1,317	1-5 years