Stock-Based Compensation Plans (Tables) (Restricted stock)

3 Months Ended

Mar. 31, 2013

Restricted stock

Stock-based compensation plans

Summary of activity under the 2007 Plan

	Shares
Restricted stock at December 31, 2010	575,791
Granted in 2011 (vesting over 4 years)	324,924
Granted in 2011 (vesting on first anniversary from date of issuance)	22,100
Cancelled in 2011	(27,477	)
Vested in 2011	(244,044	)
Restricted stock at December 31, 2011	651,294
Granted in 2012 (vesting over 4 years)	283,000
Granted in 2012 (vesting on first anniversary from date of issuance)	28,040
Cancelled in 2012	(8,988	)
Vested in 2012	(270,692	)
Restricted stock at December 31, 2012	682,654
Granted in 2013	—
Cancelled in 2013	—
Vested in 2013	(43,750	)
Restricted Stock at March 31, 2013	638,904